A digital signature is equivalent to a handwritten signature in paper, and a digital signature serves three basic purposes. Digital signature is commonly used for software distribution, financial transactions and other cases where it is important to detect forgery. Digital signatures are very popular with e-mail users. In this video, I will talk about the digital, uses, and the whole process of creating and sending digitally signed document over the Internet. Keep in mind, digital signature is not about encrypting document, just like paper-based signature. Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Please subscribe to my channel! Please leave comments or questions! Many thanks, Sunny Classroom
Views: 141079 Sunny Classroom
This Tutorial Explain What is Digital Signature in Hindi. A Digital Signature in Hindi (not to be confused with a digital certificate) is a mathematical technique used to validate the authenticity and integrity of a message, software or digital document. It Covers Points like digital signature in cryptography in hindi, digital signature in network security and digital signature in dbms(advance database management system) Digital Signature Use Asymatric Key to Encrypt Data. Digital signatures are often used to implement electronic signatures, a broader term that refers to any electronic data that carries the intent of a signature How digital signatures work Digital signatures are based on public key cryptography, also known as asymmetric cryptography. Using a public key algorithm such as RSA, one can generate two keys that are mathematically linked: one private and one public. To create a digital signature, signing software (such as an email program) creates a one-way hash of the electronic data to be signed. The private key is then used to encrypt the hash. The encrypted hash -- along with other information, such as the hashing algorithm -- is the digital signature. The reason for encrypting the hash instead of the entire message or document is that a hash function can convert an arbitrary input into a fixed length value, which is usually much shorter. This saves time since hashing is much faster than signing. Subscribe my Channel: https://goo.gl/FYkHc5 Reference Link: https://en.wikipedia.org/wiki/Digital_signature
Views: 8921 Introtuts
Digital Signature : If the Sender Private key is used at encryption then it is called digital signature. This digital Signature is implemented two approaches 1) RSA Approach 2) DSS Approach.
Views: 62521 Sundeep Saradhi Kanthety
Digital Signature - Asymmetric Key Cryptography, Why used for Authentication and Non Repudiation (Hindi) Keywords: Digital Signature Asymmetric Encryption Authentication Non Repudiation
Views: 86138 Easy Engineering Classes
Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 30412 Last moment tuitions
Namaskaar Dosto, maine is video mein aapse Digital Signatures ke baare mein baat ki hai, aap sabhi ne bahut baar inke baare mein suna hoga, daily life mein toh aap sabhi signatures ko use karte hai, but Digital Signatures ekdum alag concept hai aur kaafi important bhi hai. Mujhe umeed hai ki aapko Digital Signatures ke baare mein yeh video pasand aayega. Share, Support, Subscribe!!! Subscribe: http://bit.ly/1Wfsvt4 Youtube: http://www.youtube.com/c/TechnicalGuruji Twitter: http://www.twitter.com/technicalguruji Facebook: http://www.facebook.com/technicalguruji Facebook Myself: https://goo.gl/zUfbUU Instagram: http://instagram.com/technicalguruji Google Plus: https://plus.google.com/+TechnicalGuruji About : Technical Guruji is a YouTube Channel, where you will find technological videos in Hindi, New Video is Posted Everyday :)
Views: 265767 Technical Guruji
Digital Signature: https://www.youtube.com/watch?v=TmA2QWSLSPg&t=2s Digital signature is used for authentication, non-repudiation and data integrity, but there is one weakness of digital signature alone: man-in-the-middle attack. Digital certificates are electronic credentials issued by a trusted third party. A digital certificate not only verifies the identity of the owner, but also verifies that the owner owns the public key. In this video, I will demonstrate why digital signature has weakness and how digital certificate comes in place to make sure digitally signed document must come originally from the claimed sender. Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Please leave comments, questions and please subscribe! Sunny Classroom
Views: 43330 Sunny Classroom
Lesson 4 of cryptography series (to see all video check cryptography playlist - link given below). cryptography playlist : https://www.youtube.com/watch?v=_Yw7QWbk9Vs&list=PLf8bMP4RWebLVGpUnhji9Olkj1jdXfzFd Subscribe to our new youtube channel also : https://www.youtube.com/channel/UCNx1Gkyy9LfOxDMbcOKuV4g What is a digital certificate ? What is a digital signature ? All about digital certificates and signatures . This video includes : advantages and disadvantages of digital certificates , working of digital certificates , in depth meaning of digital certificates and digital signatures , how public key of server gets shared with client securely , what could happen if digital certificates were forged , what is a certified authority , what is a self signed certificate , hierarchy of certified authorities , comparing digital signatures to real life signatures , comparing digital certificates to real life signatures and a lot more . #digital #certificate #signature
Views: 215002 Hacks And Security - Concepts of Technology
This channel introduces the "e-Estonia" - a term commonly used to describe Estonia's emergence as one of the most advanced e-societies in the world. You can learn more about Estonian ICT and technology by watching the videos, visiting our homepage http://e-estonia.com or follow us on FB e-Estonia .You can also book a visit and live demo at Estonian ICT Demo Center in Tallinn and establish business contacts with Estonian ICT companies.
Views: 231141 e-estonia
The Digital Signatures training module is part of the CISSP FREE training course from Skillset.com (https://www.skillset.com/certifications/cissp). Skillset helps you pass your certification exam. Faster. Guaranteed. https://www.skillset.com Topic: Digital Signatures Skill: Cryptography Fundamentals Skillset: Identity and Access Management Certification: CISSP Join the 40,000+ candidates in over 58 countries that have found a faster, better way to pass their certification exam. + Unlimited access to thousands of practice questions + Exam readiness score + Smart reinforcement + Focused training ensures 100% exam readiness + Personalized learning plan + Align exam engine to your current baseline knowledge + Eliminate wasted study time + Exam pass guarantee And much more - https://www.skillset.com
Views: 4991 Skillset
Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - A cryptographic hash can be used for many different tasks. In this video, you’ll learn about hashing, collisions, digital signatures, and more. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 31714 Professor Messer
One use of trapdoor functions is to encrypt a message so that it can be safely transmitted across an insecure channel. Another use is to allow a sender to sign a message so that the recipient can verify that the sender originated the message and that the message was not altered during transmission. Along with encryption, digital signatures form the basis for secure and trusted communication online. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 10809 internet-class
Signing and claiming ownership of data is a basic act in cyber space, especially to approve financial transactions, and verify critical instructions. The prevailing signatures today are based on algorithmic complexity, which is essentially a cryptanalytic minefield - vulnerable to weaponized math. Alternatively, we can rely on lavish use of randomness, and resurrect pre-complexity solutions. The forgotten Lamport signature is attracting new interest.
Views: 2381 Gideon Samid
Types of digital signature approaches - RSA approach - DSS approach Digital Signature Algorithm with easy explanation -~-~~-~~~-~~-~- Please watch: "PL vs FOL | Artificial Intelligence | (Eng-Hindi) | #3" https://www.youtube.com/watch?v=GS3HKR6CV8E -~-~~-~~~-~~-~-
Views: 54890 Well Academy
This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA. Introduction to Digital Signature | Public Key cryptography To study interview questions on Linked List watch http://www.youtube.com/playlist?list=PL3D11462114F778D7&feature=view_all To prepare for programming Interview Questions on Binary Trees http://www.youtube.com/playlist?list=PLC3855D81E15BC990&feature=view_all To study programming Interview questions on Stack, Queues, Arrays visit http://www.youtube.com/playlist?list=PL65BCEDD6788C3F27&feature=view_all To watch all Programming Interview Questions visit http://www.youtube.com/playlist?list=PLD629C50E1A85BF84&feature=view_all To learn about Pointers in C visit http://www.youtube.com/playlist?list=PLC68607ACFA43C084&feature=view_all To learn C programming from IITian S.Saurabh visit http://www.youtube.com/playlist?list=PL3C47C530C457BACD&feature=view_all
Views: 36187 saurabhschool
This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA. Message Digest and Digital Signature To study interview questions on Linked List watch http://www.youtube.com/playlist?list=PL3D11462114F778D7&feature=view_all To prepare for programming Interview Questions on Binary Trees http://www.youtube.com/playlist?list=PLC3855D81E15BC990&feature=view_all To study programming Interview questions on Stack, Queues, Arrays visit http://www.youtube.com/playlist?list=PL65BCEDD6788C3F27&feature=view_all To watch all Programming Interview Questions visit http://www.youtube.com/playlist?list=PLD629C50E1A85BF84&feature=view_all To learn about Pointers in C visit http://www.youtube.com/playlist?list=PLC68607ACFA43C084&feature=view_all To learn C programming from IITian S.Saurabh visit http://www.youtube.com/playlist?list=PL3C47C530C457BACD&feature=view_all
Views: 12851 saurabhschool
What is Hashing & Digital Signature in The Blockchain? https://blockgeeks.com/ Today, we're going to be talking about the word blockchain and breaking it down to understand what does it mean when someone says, "Blockchain." What is hashing? Hashing refers to the concept of taking an arbitrary amount of input data, applying some algorithm to it, and generating a fixed-size output data called the hash. The input can be any number of bits that could represent a single character, an MP3 file, an entire novel, a spreadsheet of your banking history, or even the entire Internet. The point is that the input can be infinitely big. The hashing algorithm [00:01:00] can be chosen depending on your needs and there are many publicly available hashing algorithms. The point is that the algorithm takes the infinite input of bits, applies some calculations to them, and outputs a finite number of bits. For example, 256 bits. What can this hash be used for? A common usage for hashes today is to fingerprint files, also known as check zones. This means that a hash is used to verify that a file has not been [00:01:30] tampered with or modified in any way not intended by the author. If WikiLeaks, for example, publishes a set of files along with their MD5 hashes, whoever downloads those files can verify that they are actually from WikiLeaks by calculating the MD5 hash of the downloaded files, and if the hash doesn't match what was published by WikiLeaks, then you know that the file has been modified in some way. How does the blockchain make use of hashes? [00:02:00] Hashes are used in blockchains to represent the current state of the world. The input is the entire state of the blockchain, meaning all the transactions that have taken place so far and the resulting output hash represents the current state of the blockchain. The hash is used to agree between all parties that the world state is one in the same, but how are these hashes actually calculated? The first hash is calculated for the first block [00:02:30] or the Genesis block using the transactions inside that block. The sequence of initial transactions is used to calculate a block hash for the Genesis block. For every new block that is generated afterwords, the previous block's hash is also used, as well as its own transactions, as input to determine its block hash. This is how a chain of blocks is formed, each new block hash pointing to the block hash that came before it. This system of hashing guarantees that no transaction in the history can be tampered with because if any single part of the transaction changes, so does the hash of the block to which it belongs, and any following blocks' hashes as a result. It would be fairly easy to catch any tampering as a result because you can just compare the hashes. This is cool because everyone on the blockchain only needs to agree on 256 bits to represent the potentially infinite state of the blockchain. The Ethereum blockchain is currently tens of gigabytes, but the current state of the blockchain, as of this recording, is this hexadecimal hash representing 256 bits. What about digital signatures? Digital signatures, like real signatures, are a way to prove that somebody is who they say they are, except that we use cryptography or math, which is more secure than handwritten signatures that can be [00:04:00] easily forged. A digital signature is a way to prove that a message originates from a specific person and no one else, like a hacker. Digital signatures are used today all over the Internet. Whenever you visit a website over ACTPS, you are using SSL, which uses digital signatures to establish trust between you and the server. This means that when you visit Facebook.com, your browser can check the digital signature that came with the web page to verify that it indeed originated from Facebook and not some hacker. In asymmetric encryption systems, users generate something called a key pair, which is a public key and a private key using some known algorithm. The public key and private key are associated with each other through some mathematical relationship. The public key is meant to be distributed publicly to serve as an address to receive messages from other users, like an IP address or home address. The private key is meant to be kept secret and is used to digitally sign messages sent to other users. The signature is included with the message so that the recipient can verify using the sender's public key. This way, the recipient can be sure that only the sender could have sent this message. Generating a key pair is analogous to creating an account on the blockchain, but without having to actually register anywhere. Pretty cool. Also, every transaction that is executed on the blockchain is digitally signed by the sender using their private key. This signature ensures that only the owner of the account can move money out of the account.
Views: 26847 Blockgeeks
Digital Certificate Introduction, PKI, Certificate Authority Lecture in Hindi Keywords: Digital Certificate PKI Certificate Authority
Views: 56231 Easy Engineering Classes
X.509 AUTHENTICATION SERVICE PART 1 - NETWORK SECURITY #networksecuritylectures, #informationsecuritylectures, #x509authenticationservice
Views: 14668 Sundeep Saradhi Kanthety
This video gives an overview of the RSA Digital Signature. It shows how this scheme is closely related to RSA encryption/decryption.
Views: 8330 Leandro Junes
In this playlist you will learn about the following topics Protocols, Layered Model Network components Uses of networks Traceroute and socket API Protocols and layering Reference models (Internet, OSI) History of the internet Physical and Direct Link Layer Simple link models (latency, bandwidth-delay product) Media and signals Modulation schemes (baseband, passband) Fundamental limits (Shannon) Framing Error detection schemes (checksum, CRC) Error correction schemes (Hamming) Retransmissions, Multiple access, Switching Retransmissions (ARQ) Multiplexing schemes (TDM. FDM) Random access / Ethernet (CSMA family) Wireless access / 802.11 Contention-free access / Token Ring LAN switching (switches vs. hubs, spanning tree, backward learning) Network Layer and Internetworking Datagram and virtual circuit models (IP, MPLS) IP addressing and forwarding (prefixes, longest matching prefix) IP helpers: ARP, DHCP Internetworking (fragmentation, path MTU discovery, ICMP) IPv4 and IPv6 Network Address Translation (NAT) Routing Shortest cost routing model Dijkstra's algorithm Flooding Distance Vector and Link-state Equal-cost multi-path routing Hierarchical routing (prefixes, aggregation, subnets) Multiple parties and policy (BGP) Transport Layer, Reliable Transport Sockets, ports and service APIs Reliable and unreliable delivery (TCP, UDP) Connection establishment and teardown Flow control and sliding windows Retransmission timeouts Congestion Control Fairness and Efficiency Additive Increase Multiplicative Decrease (AIMD) TCP congestion control (slow start, fast retransmission and recovery) Congestion avoidance (ECN) Web and Content Distribution Naming (DNS) Web protocols (HTTP, caching) Content Distribution Networks (CDNs) Peer-to-Peer (BitTorrent) Quality of Service and Real-Time Apps Streaming media and Conferencing Scheduling disciplines (FIFO, WFQ) Traffic shaping with Token Buckets Differentiated Services Rate and Delay Guarantees Optional: Network Security Encryption for Confidentiality and Authenticity Web security (SSL, DNSSEC) Wireless security (802.11i) Firewalls and Virtual Private Networks (VPNs) Distributed Denial of Service (DDOS) Computer Networks 1 OSI Model in Networking OSI model layers and their function (L1) 2 IP Address Basics: Classful Addressing dotted decimal notation 3 IP Address: Network ID and Host ID Network Mask 4 IP Address Subnet Supernet subnetmask 5 Classless IP Addressing: Subnet Mask, subnet block size, network address 6 Block Allocation of IP address Create subnets from block of IP address 7 Introduction to Interconnecting Devices: REPEATERS HUBS BRIDGE SWITCHES ROUTERS 8 VLAN: Virtual Lan concepts VLAN TRUNK and Switches 9 Address Resolution Protocol (ARP) and Reverse ARP explained Animated 10 Medium Access Control: Aloha and Slotted Aloha Protocol 11 Carrier Sense Multiple Access Protocol CSMA 12 CSMA/CD (Carrier Sense Multiple Access/ Collision Detection) 13 Network Address Translation (NAT) 14 Dynamic Host Configuration Protocol (DHCP) 15 Circuit Switching vs Packet Switching 16 Virtual Circuit Network Virtual Circuit switching 17 Domain Name Server (DNS) Name Server DNS how dns works 18 Internet Control Message Protocol (ICMP) ICMP protocol tutorial part 1 19 Internet Control Message Protocol (ICMP) : Error Message (Part 2) 20 Stop and Wait Protocol Stop and Wair ARQ Stop and Wait Flow control 21 GO BACK N ARQ Protocol Go back N sliding window 22 SELECTIVE REPEAT ARQ selective repeat sliding window protocol 23 Authentication Protocol Man In Middle Attack Replay Attack Nonce 24 Introduction to Public Key Cryptography Public Key Cryptography animation 25 Introduction to Digital Signature Public Key cryptography 26 RSA Algorithm and public key encryption rivest shamir adleman algorithm 27 Message Digest and Digital Signature Cryptographic Hash Function 28 Certification Authority (CA) Digital Certificate 29 Secure EMail How To Public Private Key Encryption Secure E-Mail PGP
Views: 296 Vijay S
Hello friends, Digital signature is such a common term that even a non-technical person also starts using it. But most of the people interpret this term WRONG. Well in this video, I explained digital signature in detail along with examples. This video will definitely help you to correct your concept about digital signature. I also explained encryption, decryption, public key and private key along with digital signature so that you can better understand the working of the digital signature. To connect with WeT Facts, follow Wet Facts on following platforms: Youtube: https://www.youtube.com/c/wetfacts Facebook: https://www.facebook.com/wetfacts Instagram : https://www.instagram.com/wetfacts/ (@wetfacts) Blogger: https://www.wetfacts.blogspot.in Twitter: https://www.twitter.com/WeTFacts Email: [email protected] So to keep informed, Kindly watch this video till the end. Don't forget to subscribe to this channel so that you can get updates about my new and interesting videos. Because at WeTFacts, We only talk and unveil TRUTH. ------------------------------------------------------------------------------------------------------------ DISCLAIMER: All the images shown in this video, Belongs to the respected owners/creators and not to me. I am not the owner of any imaged showed in this video. ------------------------------------------------------------------------------------------------------------ #DigitalSignature #Encryption #PublicKey
Views: 448 WeT Facts
To buy Full Course of CS Executive Jurisprudence, Interpretation & General Laws, Click the following link: https://www.instamojo.com/SudhirSachdeva/cs-executive-jurisprudence-interpretation-an/?ref=store Click the following link to Buy My Video Classes https://www.instamojo.com/SudhirSachdeva/?ref=profile_bar Click the following link to buy our video lectures https://www.instamojo.com/SudhirSachdeva/?ref=offer_page What is Digital Signature? What is the Difference Between Digital and Electronic Signature BUY CA COURSES CA (NEW SYLLABUS) CA-INTER-Corporate & Other Laws (Pen Drive+Printed Book) http://bit.ly/CorporateAndOtherLaws1 CA-INTER-Corporate & Other Laws (Download Link+Printed Book) http://bit.ly/CorporateAndOtherLaws2 CA FOUNDATION LAW (Pen Drive + Printed Book) http://bit.ly/CAFoundationLaw1 CA FOUNDATION LAW (Download Link+Printed Book) http://bit.ly/CAFoundationLaw2 CA (OLD SYLLABUS) CA-IPCC Law, Ethics and Communication (Pen Drive + Printed Book) http://bit.ly/LawEthicsAndComm1 CA-IPCC Law, Ethics and Communication (Download Link+ Printed Book) http://bit.ly/LawEthicsAndComm2 CA-CPT MERCANTILE LAW (Pen Drive+Printed Book) http://bit.ly/CPTMercantileLaw1 CA-CPT MERCANTILE LAW (Download Link+Printed Book) http://bit.ly/CPTMercantileLaw2 BUY CS COURSES CS (NEW SYLLABUS) CS Executive-Jurisprudence, Interpretation and General Laws (Pen Drive+Printed Book) http://bit.ly/CSExeJIGL1 CS Exec-Jurisprudence, Interpretation and General Laws (Download Link+Printed Book) http://bit.ly/CSExeJIGL2 CS FOUNDATION LAW (Pen Drive + Printed Book) http://bit.ly/CSFoundationLaw1 CS FOUNDATION LAW (Download Link+Printed Book) http://bit.ly/CSFoundationLaw2 CS (OLD SYLLABUS) CS Exec - Industrial, Labour and General Laws - (Pen Drive+Printed Book) http://bit.ly/CSILGL CS Exec - Industrial, Labour and General Laws - (Download Link+Printed Book) http://bit.ly/CSILGL1 BUY CMA COURSES CMA (NEW SYLLABUS) CMA INTERMEDIATE LAW AND ETHICS (Pen Drive+Printed Book) http://bit.ly/LAWSANDETHICS CMA INTERMEDIATE LAW AND ETHICS (Download Link+Printed Book) http://bit.ly/LawsAndEthics1 CMA FOUNDATION LAWS AND ETHICS (Pen Drive+Printed Book) http://bit.ly/LawsAndEthicsF CMA FOUNDATION LAWS AND ETHICS (Download Link+Printed Book) http://bit.ly/LawsAndEthicsF2
Views: 42070 SUDHIR SACHDEVA
What is NONREPUDIATION? What does NONREPUDIATION mean? NONREPUDIATION meaning - NONREPUDIATION pronunciation - NONREPUDIATION definition - NONREPUDIATION explanation - How to pronounce NONREPUDIATION? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Non-repudiation refers to a state of affairs where the author of a statement will not be able to successfully challenge the authorship of the statement or validity of an associated contract. The term is often seen in a legal setting wherein the authenticity of a signature is being challenged. In such an instance, the authenticity is being "repudiated". In a general sense non-repudiation involves associating actions or changes to a unique individual. For a secure area, for example, it may be desirable to implement a key card access system. Non-repudiation would be violated if it were not also a strictly enforced policy to prohibit sharing of the key cards and to immediately report lost or stolen cards. Otherwise determining who performed the action of opening the door cannot be trivially determined. Similarly, for computer accounts, the individual owner of the account must not allow others to use that account, especially, for instance, by giving away their account's password, and a policy should be implemented to enforce this. This prevents the owner of the account from denying actions performed by the account. Regarding digital security, the cryptological meaning and application of non-repudiation shifts to mean: A service that provides proof of the integrity and origin of data. An authentication that can be asserted to be genuine with high assurance. Proof of data integrity is typically the easiest of these requirements to accomplish. A data hash, such as SHA2, is usually sufficient to establish that the likelihood of data being undetectably changed is extremely low. Even with this safeguard, it is still possible to tamper with data in transit, either through a man-in-the-middle attack or phishing. Due to this flaw, data integrity is best asserted when the recipient already possesses the necessary verification information. The most common method of asserting the digital origin of data is through digital certificates, a form of public key infrastructure to which digital signatures belong. Note that the public key scheme is not used for encryption in this form; i.e. the goal is not to achieve confidentiality, since a message signed with a private key can be read by anyone using the public key. Verifying the digital origin means that the certified/signed data can be, with reasonable certainty, trusted to be from somebody who possesses the private key corresponding to the signing certificate. If the key is not properly safeguarded by the original owner, digital forgery can become a major concern. The ways in which a party may attempt to repudiate a signature present a challenge to the trustworthiness of the signatures themselves. The standard approach to mitigating these risks is to involve a trusted third party. The two most common TTPs are forensic analysts and notaries. A forensic analyst specializing in handwriting can look at a signature, compare it to a known valid signature, and make a reasonable assessment of the legitimacy of the first signature. A notary provides a witness whose job is to verify the identity of an individual by checking other credentials and affixing their certification that the party signing is who they claim to be. Further, a notary provides the extra benefit of maintaining independent logs of their transactions, complete with the type of credential checked and another signature that can independently be verified by the preceding forensic analyst. For this double security, notaries are the preferred form of verification. On the digital side, the only TTP is the repository for public key certificates. This provides the recipient with the ability to verify the origin of an item even if no direct exchange of the public information has ever been made. The digital signature, however, is forensically identical in both legitimate and forged uses - if someone possesses the private key they can create a "real" signature. The protection of the private key is the idea behind the United States Department of Defense's Common Access Card (CAC), which never allows the key to leave the card and therefore necessitates the possession of the card in addition to the personal identification number (PIN) code necessary to unlock the card for permission to use it for encryption and digital signatures.
Views: 5271 The Audiopedia
Use of cryptographic hash functions for authentication. Digital signatures with public key crypto and hash functions. Required properties of hash functions. Course material via: http://sandilands.info/sgordon/teaching
Views: 2156 Steven Gordon
Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq See my entire index of CompTIA Security+ videos at http://www.FreeSecurityPlus.com - - - - - Our encryption technologies not only provide a secure channel of communication, but they can also prove that the data we’re receiving has not been changed between endpoints. In this video, you’ll learn about non-repudiation and how digital signatures can ensure the integrity and authenticity of our data. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 29833 Professor Messer
How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Views: 249204 Simply Explained - Savjee
In public key encryption, two different keys are used to encrypt and decrypt data.One is the public key and other is the private key. These two keys are mathematically related. They come as a pairs. The public key encryption is also called asymmetric key encryption because two different keys are used. Public key algorithm is used for different purpose from private key algorithm. It is used for verification and authentication. In this video, I will use an example to demonstrate how to use public key. Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Please leave comments, questions and please subscribe!
Views: 38063 Sunny Classroom
This video explains how the elgama cryptosystem encryption and decryption is done 😎😎 Visit Our Channel :- https://www.youtube.com/channel/UCxik... In this lecture we have taught about Diffie Hellman Key Exchange and how it operates. Also a quick overview of AES and the basics of encryption. Follow Smit Kadvani on :- Facebook :- https://www.facebook.com/smit.kadvani Instagram :- https://www.instagram.com/the_smit0507 Follow Dhruvan Tanna on :- Facebook :- https://www.facebook.com/dhruvan.tanna1 Instagram :- https://www.instagram.com/dhru1_tanna Follow Keyur Thakkar on :- Facebook :- https://www.facebook.com/keyur.thakka... Instagram :- https://www.instagram.com/keyur_1982 Snapchat :- keyur1610 Follow Ankit Soni on:- Instagram :- https://www.instagram.com/ankit_soni1511
Views: 34823 Quick Trixx
Please Fill the form - https://docs.google.com/forms/d/1kOxvqvz1IvBMHJ3UeLecLDuK7ePKjHAvHaRcxduHKEE/edit ====================================================== Answer of your Questions Asked to me. (direct Link given below) Blogger Link - http://shalik-htd.blogspot.com/ ====================================================== Hey, friends, I upload the videos in this channel in Hindi for Engineering student of UPTU and other universities for computer science and IT (information technology) students. like share and subscribe my channel ====================================================== Install C Programming Solution Android app - https://play.google.com/store/apps/details?id=com.shalik.patel.cprogrammingsolution ====================================================== ====================================================== My Career Planning android app - https://play.google.com/store/apps/details?id=guide.mycareer.com.rec.mycareer ====================================================== ====================================================== My Android App for my College Library (An Official App Of College Library) - https://play.google.com/store/apps/details?id=jrv.library.rec.reclibrary ====================================================== How to use android application - https://www.youtube.com/watch?v=1hMZCvl-JxM ====================================================== Contact me on Facebook - https://www.facebook.com/HTD-hub-250593705388294/?ref=br_rs ====================================================== Follow me on twitter - https://twitter.com/PatelShalik ======================================================
Views: 8347 hindi tutorials darshan
What is hash function/algorithm? What is mainly used for? What are three basic characteristics of a secure hash algorithm? In this video, I will also demonstrate how hash function works. Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Please leave comments, questions, and Please subscribe! Thank you very much! Sunny Classroom
Views: 48962 Sunny Classroom
RSA Algorithm is the example for Public Key Encryption algorithm. Here we are supposed to find two keys 1) Public Key which is used at encryption 2) Private Key which is used at decryption step 1: Select two large Primes P , Q Step 2: Calculate n=P*Q & O(n) = (P-1)*(Q-1) Step 3: Assume e and d (Public and Private Key). Step 4: Encrypt the Plain Text using Public Key e. Step 5: Decrypt the Cipher Text using Private Key d.
Views: 101753 Sundeep Saradhi Kanthety
ITSA LECTURE 3 (DIGITAL SIGNATURE ,HASH FUNCTION ,MESSEGE DIGEST DEFINED)
Views: 1605 LectureDekho.com
What is DIGITAL SIGNATURE? What does DIGITAL SIGNATURE mean? DIGITAL SIGNATURE explanation. A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or documents. A valid digital signature gives a recipient reason to believe that the message was created by a known sender, that the sender cannot deny having sent the message (authentication and non-repudiation), and that the message was not altered in transit (integrity). Digital signatures are a standard element of most cryptographic protocol suites, and are commonly used for software distribution, financial transactions, contract management software, and in other cases where it is important to detect forgery or tampering. Digital signatures are often used to implement electronic signatures, a broader term that refers to any electronic data that carries the intent of a signature, but not all electronic signatures use digital signatures. In some countries, including the United States, India, Brazil, Saudi Arabia, Switzerland and the countries of the European Union, electronic signatures have legal significance. Digital signatures employ asymmetric cryptography. In many instances they provide a layer of validation and security to messages sent through a nonsecure channel: Properly implemented, a digital signature gives the receiver reason to believe the message was sent by the claimed sender. Digital seals and signatures are equivalent to handwritten signatures and stamped seals. Digital signatures are equivalent to traditional handwritten signatures in many respects, but properly implemented digital signatures are more difficult to forge than the handwritten type. Digital signature schemes, in the sense used here, are cryptographically based, and must be implemented properly to be effective. Digital signatures can also provide non-repudiation, meaning that the signer cannot successfully claim they did not sign a message, while also claiming their private key remains secret; further, some non-repudiation schemes offer a time stamp for the digital signature, so that even if the private key is exposed, the signature is valid. Digitally signed messages may be anything representable as a bitstring: examples include electronic mail, contracts, or a message sent via some other cryptographic protocol.
Views: 1860 The Audiopedia
What is SIGNCRYPTION? What does SIGNCRYPTION mean? SIGNCRYPTION meaning - SIGNCRYPTION pronunciation - SIGNCRYPTION definition - SIGNCRYPTION explanation - How to pronounce SIGNCRYPTION? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, signcryption is a public-key primitive that simultaneously performs the functions of both digital signature and encryption. Encryption and digital signature are two fundamental cryptographic tools that can guarantee the confidentiality, integrity, and non-repudiation. Until 1997, they were viewed as important but distinct building blocks of various cryptographic systems. In public key schemes, a traditional method is to digitally sign a message then followed by an encryption (signature-then-encryption) that can have two problems: Low efficiency and high cost of such summation, and the case that any arbitrary scheme cannot guarantee security. Signcryption is a relatively new cryptographic technique that is supposed to perform the functions of digital signature and encryption in a single logical step and can effectively decrease the computational costs and communication overheads in comparison with the traditional signature-then-encryption schemes. Signcryption provides the properties of both digital signatures and encryption schemes in a way that is more efficient than signing and encrypting separately. This means that at least some aspect of its efficiency (for example the computation time) is better than any hybrid of digital signature and encryption schemes, under a particular model of security. Note that sometimes hybrid encryption can be employed instead of simple encryption, and a single session-key reused for several encryptions to achieve better overall efficiency across many signature-encryptions than a signcryption scheme but the session-key reuse causes the system to lose security under even the relatively weak CPA model. This is the reason why a random session key is used for each message in a hybrid encryption scheme but for a given level of security (i.e., a given model, say CPA), a signcryption scheme should be more efficient than any simple signature-hybrid encryption combination.
Views: 156 The Audiopedia
Certificates are used to prove identity and used for creating secure communication. Check out http://itfreetraining.com for more of our always free training videos. This video looks at how a certificate works, what is a certificate and how they are used for identification and secure communication. Download the PDF handout http://itfreetraining.com/Handouts/Certificates/WhatAreCertificates.pdf What is a certificate? A certificate is an electronic document that contains data fields. When compared to a traditional paper certificate there are some similarities between an electronic certificate and a physical certificate. Digital certificates like a physical certificate are issued by an authority. For example, a university may issue a certificate to a student to show that they have completed the necessary work in order to graduate. The next question is, would you trust a physically certificate? Digital certificates work the same way. They are issued from an authority and the question becomes would you trust the authority that issued the certificate? Electronic certificates also contain other fields like who or what the certificate was issued to, how long it is valid, the public key and the digital signature. If a digital certificate is presented to a user or computer, the user or computer is able to check the certificate to ensure the person using it should be using it. Also the certificate contains a digital signature which allows the certificate to be checked to make sure it has not been modified. Digital Signature A digital signature provides a method for a certificate to be checked to ensure it has not been modified. In order to do this, a hash value is created for the certificate. To generate a hash value the certificate is put through a function to create a single value. Hash functions are designed so different certificates will not produce the same value, however the hash value cannot be used to generate the original certificate. The same principal applies to a person's fingerprints. They can be used to identify a person, however using a finger print you could not work out the features of a person like what color hair they have. When a certificate is created, the hash value for that certificate is also created. Using a function involving the private key, a digital signature is created and added to the certificate. Digital Signature Example When a certificate is used, in order to check the certificate has not been changed, the following is done: The computer generates the hash value for the certificate. Next, the digital signature is put through a function using the public key which should result in the same hash value. If both values match, the certificate has not been modified. This prevents a 3rd party taking a certificate, changing the values in the certificate and using the certificate. Trust Model Certificates work off a trust model. An example of a trust model in computers is that a computer may have a sticker on it indicating which operating systems it will run. The consumer, seeing this sticker, must trust that the manufacture would not put this sticker on the laptop unless it will run that operating system. The customer must also trust the creator of that operating system would not allow a computer manufacturer to put a sticker on a computer that would not run that operating system. Certificate Trust Model Certificates are generally deployed in a hierarchy. At the top is the root certificate authority. This can be an internal Certificate Authority or an external authority like VeriSign. When an authority like VeriSign issues a certificate, they will perform a number of checks on the individual purchasing the certificate to ensure that they are a valid business. When a certificate is used it can be checked to see which authority issued that certificate. In order for the certificate to be used, the computer must trust the authority that it was issued from. Authorities like VeriSign are trusted by default on most operating systems. Certificate Error If a certificate is presented to the computer and it is not trusted, the computer will generate an error asking if the users want to trust the certificate. It is up to the user to decide if they believe the certificate is valid. Certificate Hierarchy Certificates use a hierarchy. At the top is the root CA, below these are subordinate CA's. Any level can issue certificates to subordinate CA's or direct to users, computers or devices. If the user, computer or device trusts the root CA, then any certificate that is issued by any CA in the hierarchy will automatically be trusted and thus used by the client. References "MCTS 70-640 Configuring Windows Server 2008 Active Directory Second edition" pg 771-775 "Public key certificate" http://en.wikipedia.org/wiki/Public_key_certificate
Views: 528636 itfreetraining
என்கிரிப்சன் என்றால் என்ன ? தமிழ் டெக் What is Encryption, Decryption & Public Key Encryption? | Tamil Tech Explained.Like and Share this Video, Subscribe and Support us . More Tamil Tech Explained : https://goo.gl/Wxeip0 ****************************************************************** JOIN TAMIL TECH & Support us : Website : www.TamilTechOfficial.com YouTube : https://youtube.com/TamilTechOfficial Facebook: https://facebook.com/TamilTechOfficial/ Twitter: https://twitter.com/TamilTechOffici instagram : http://instagram.com/TamilTechOfficial ****************************************************************** இது போல இன்னும் பல tech வீடியோ உங்கள்ளுக்காக . SUBSCRIBE செய்யவும் . Check Other Videos of TAMIL TECH : FULL PLAYLIST : http://goo.gl/hKNNFX Tamil Tech News :https://goo.gl/0leUcj Tamil Tech Tips : https://goo.gl/nEdDeZ VR Series : https://goo.gl/iRPZ2i YouTuber Series : https://goo.gl/YvWnCX Tamil Tech Top APP Series : https://goo.gl/2mnxV9 Top Smartphones : https://goo.gl/SuXYhz Best Buy Tips : https://goo.gl/BTKvc9 My Opinions : https://goo.gl/41WgxA Whatsapp Tips & Tricks : https://goo.gl/A1qRo4 Super Gadget Unboxing & Review : https://goo.gl/edTy52 Android TIps & Tricks : https://goo.gl/OeD4m0 Real or Fake Series : https://goo.gl/sR9EH4 Tamil Tech Super app : https://goo.gl/C7872Y Tamil Tech Achivement : https://goo.gl/6rbl8c Tamil Tech Live QnA :https://goo.gl/LVFhyF Tamil Tech Prime : https://goo.gl/wSH6qD How to Tamil : https://goo.gl/npdNGR Tamil Tech Unboxng : https://goo.gl/KnhwJt ---------------------------------------------------------------------------------------------------- My ENGLISH TECH CHANNEL - HOWISIT : YOUTUBE : https://www.youtube.com/c/howisitin Facebook: https://www.facebook.com/howisit.in , Twitter: https://www.twitter.com/howisitin , Google plus: https://plus.google.com/u/howisitin, website : http://howisit.in
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