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Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 439519 itfreetraining
Image Encryption Using AES Algorithm
 
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Get the project at http://nevonprojects.com/image-encryption-using-aes-algorithm/ This project makes use of advanced encryption algorithm AES to encrypt images and transfer them securely as text files for secure image transfer through internet.
Views: 14524 Nevon Projects
Image Encryption and Decryption using Chaotic Key Sequence
 
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Image Encryption and Decryption using Chaotic Key Sequence Generated by Sequence of Logistic Map and Sequence of States of Linear Feedback Shift Register This video project is done by: Potcharaphol Chat-anan (Aung) Tan Wei Jie, Chester Feng Wei Nicholas Koh Ming Xuan Jonathan Liem Zhuan Kim Chia Su Chi Faith
Views: 10584 Potcharaphol Chat-anan
A Survey on Ring-LWE Cryptography
 
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The Ring Learning-with-Errors problem, proposed by Lyubashevsky, Peikert and Regev in 2010, is a variant of the traditional Learning-with-Errors problem, and is an active research area in lattice based cryptography. It has drawn increased attention due to the important application to constructing homomorphic encryption schemes. The security of RLWE problems relies on the hardness of certain standard problems over ideal lattices. In the first part of the talk, I will review the basics of RLWE problems, the hardness proofs, and major RLWE encryption schemes. Then I will survey different attacks to RLWE, including our new attacks to non-dual RLWE in sub-cyclotomic fields and small error dual RLWE on prime cyclotomic fields. I will end by summarizing the security situation for various RLWE problems. This is joint work with Kristin Lauter and Katherine Stange.
Views: 1628 Microsoft Research
SSL Certificate Explained
 
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Views: 815289 dtommy1979
Multi image integration and Encryption Algorithm for security applications
 
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This project focuses on implementing a secure image technique that enables to select one of the several images displayed simultaneously with a unique security key for each image. This process involves applying block based interleaving, followed by integrating the image matrix using the pixel based integration technique and encrypting the images with Advanced Encryption Algorithm. With the key specifically generated for the image, the original image is decrypted from multiple images. This method is useful when access permissions needs to be restricted to certain viewers.
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 601216 Art of the Problem
SECURE BANKING APPLICATION USING VISUAL CRYPTOGRAPHY AGAINST FAKE WEBSITE AUTHENTICITY THEFT
 
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Core banking is a set of services provided by a group of networked bank branches. Bank customers may access their funds and perform other simple transactions from any of the member branch offices. The major issue in core banking is the authenticity of the customer. Due to unavoidable hacking of the databases on the internet. To solve this problem of authentication, we are proposing an algorithm based on image processing, i.e. visual cryptography. Visual Cryptography is a special encryption technique to hide information in images in such a way that it can be decrypted by the human visual system. But the encryption technique needs cryptographic computation to divide the image into a number of parts let n. In our paper we have proposed a new k-n secret sharing scheme for color image where encryption (Division) of the image is done using Random Number generator. Total number of shares to be created is depending on the scheme chosen by the bank. When two shares are created, one is stored in the Bank database and the other is kept by the customer. The customer has to present the share during all of his transactions. This share is stacked with the first share to get the original image. Then decoding method is used to take the hidden password on acceptance or rejection of the output and authenticate the customer.
Views: 391 ITEducations
Secure Boot with ATECC608A
 
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Learn how to architect a secure boot with Microchip secure element ATECC608A. It offers a strong security implementation by verifying the signed boot image of a small microcontroller with a truly immutable public key kept in the secure element. Check out our use case on http://www.Microchip.com/atecc608a
Views: 1053 Microchip Technology
Password based Encryption / Decryption on Android with AES Algorithm
 
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Learn to Encrypt and Decrypt data on Android Applications with the Advanced Encryption Standard (AES) Algorithm. Note that this tutorial has been made by Tamil for the SSaurel's Channel. If you want to collaborate on the SSaurel's Channel, don't hesitate to send me your ideas for further details. ► Discover all the Android Apps offered by SSaurel Mobile Apps : https://play.google.com/store/apps/dev?id=6924401024188312025 ► Learn to create Android Apps step by step on the SSaurel's Blog : https://www.ssaurel.com/blog ► Enter in the Bitcoin and cryptocurrency World : https://www.toutsurlebitcoin.fr
Views: 24669 Sylvain Saurel
MATLAB Application For Encrypt And Decrypt Text Data In Images
 
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http://latestembedded.blogspot.in/2015/07/matlabapplication-for-encrypt-and.html In This Project I designed One GUI Interface( Application ) on MATLAB for Hiding Data In image and Then This encrypted Image Add As Watermark into other image .Also you retrieve data from that encrypted image Using Other GUI Interface ( Application ) . Main Advantage of this Project Is u can send this encrypted Image One PC to Another PC using Serial port throw wired or Wireless connection
Views: 16234 Embedded Projects
Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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Those who are all need IEEE 2015-2016 Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography with full implementation in C#.Net mail to [email protected] or contact +91 8870791415
Lossless and Reversible Data Hiding in Encrypted Images with  Public Key Cryptography
 
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Views: 210 Clickmyproject
Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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To get IEEE 2015-2016 IEEE 2015 Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography in .Net or Java mail to [email protected] or contact +91 8870791415 IEEE 2015-2016 Project Videos: https://www.youtube.com/channel/UCyK6peTIU3wPIJxXD0MbNvA/videos?flow=grid&view=0&sort=p
Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography We develop projects in following technology JAVA/J2EE NS2 DOTNET ANDROID HADOOP / BIG DATA MATLAB ieee projects are available ready to purchase We are providing projects at low cost with good support. Please call us for further enquiry --------------------------------------------------------------------------------------------- Regards Priya (0) 9600095047 Data Alcott Systems Ph: 044- 43314035 Mobile: (0) 9600095046 / 47 https://www.finalsemprojects.com https://www.facebook.com/ieeeprojects
Views: 353 finalsemprojects
21. Cryptography: Hash Functions
 
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MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas covers the basics of cryptography, including desirable properties of cryptographic functions, and their applications to security. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 65542 MIT OpenCourseWare
Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography Do Your Projects With Technology Experts To Get this projects Call : 9566355386 / 99625 88976 Web : http://www.lemenizinfotech.com Web : http://www.ieeemaster.com Blog : http://ieeeprojectspondicherry.weebly.com Blog : http://www.ieeeprojectsinpondicherry.blogspot.in/ Youtube:https://www.youtube.com/watch?v=eesBNUnKvws Mail : [email protected]
Views: 116 Nageswaran A
Encryption and Decryption of Data in C#.net Visual Studio 2013
 
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In this tutorial I will show you how you can use cryptostream and Rijandial Algorithm for encryption and decryption of data in C#.net programming. If you have any questions feel free to leave a comment. Thanks for watching :) -~-~~-~~~-~~-~- Please watch: "How to use android glide library to efficiently load images in your android application" https://www.youtube.com/watch?v=FOYdcq86NpU -~-~~-~~~-~~-~- keywords: md5 encryption c#.net sha1 encryption c#.net encryption using c#.net aes encryption c#.net url encryption c#.net blowfish encryption c#.net encryption c# asp.net encryption decryption c#.net encryption algorithms in c#.net encryption code in c#.net encryption c#.net md5 encryption c# asp.net c# net encryption and decryption c# .net aes encryption example c# net aes encryption c# .net asymmetric encryption c# .net des encryption c# .net data encryption c# .net encryption example c# .net file encryption encryption in c#.net encryption decryption in c#.net encryption method in c#.net encryption string in c#.net encryption class in c#.net encryption in asp.net c# pgp encryption in c#.net md5 encryption in c#.net symmetric key encryption c# .net asp net c# md5 encryption encryption of password in c#.net c# .net password encryption c# .net pgp encryption c# .net rsa encryption c# .net rijndael encryption rc4 encryption in c#.net asp.net c# rsa encryption c# .net simple encryption c# .net string encryption .net c# symmetric encryption xor encryption in c#.net aes 256 encryption c#.net c# aes encryption .net 2.0 c# .net 3des encryption c# .net 4.5 encryption encryption and decryption in c#.net decryption in c#.net decrypt md5 c#.net password encryption and decryption in c#.net aes encryption and decryption in c#.net md5 encryption and decryption in c#.net simple encryption and decryption in c#.net image encryption and decryption in c#.net file encryption and decryption in c#.net string encryption and decryption in c#.net encryption and decryption in c#.net decryption in c#.net decrypt md5 c#.net password encryption and decryption in c#.net aes encryption and decryption in c#.net md5 encryption and decryption in c#.net simple encryption and decryption in c#.net image encryption and decryption in c#.net file encryption and decryption in c#.net string encryption and decryption in c#.net encryption and decryption in c#.net decryption in c#.net decrypt md5 c#.net password encryption and decryption in c#.net aes encryption and decryption in c#.net md5 encryption and decryption in c#.net simple encryption and decryption in c#.net image encryption and decryption in c#.net file encryption and decryption in c#.net string encryption and decryption in c#.net encryption and decryption in c# asp.net encryption and decryption in c#.net aes encryption and decryption in c#.net md5 encryption and decryption in c#.net simple encryption and decryption in c#.net image encryption and decryption in c#.net file encryption and decryption in c#.net string encryption and decryption in c#.net data encryption and decryption in c#.net rsa encryption and decryption in c#.net data encryption and decryption in c#.net encryption and decryption in c#.net password encryption and decryption in c#.net aes encryption and decryption in c#.net md5 encryption and decryption in c#.net simple encryption and decryption in c#.net image encryption and decryption in c#.net file encryption and decryption in c#.net string encryption and decryption in c#.net data encryption and decryption in c#.net rsa encryption and decryption in c#.net decrypt aes - c# .net from openssl file encryption and decryption in c#.net xml file encryption and decryption in c#.net encryption and decryption in c#.net decryption in c#.net password encryption and decryption in c#.net aes encryption and decryption in c#.net md5 encryption and decryption in c#.net simple encryption and decryption in c#.net image encryption and decryption in c#.net file encryption and decryption in c#.net string encryption and decryption in c#.net data encryption and decryption in c#.net md5 encryption and decryption in c#.net md5 decryption in c#.net c# .net pgp decryption password encryption and decryption in c#.net rsa encryption and decryption in c#.net rc4 decryption in c#.net simple encryption and decryption in c#.net string encryption and decryption in c#.net xml file encryption and decryption in c#.net
Views: 19552 Software Dev
Fully Homomorphic Encryption over the Integers with Shorter Public Keys
 
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At Eurocrypt 2010 van Dijk {\sl et al.} described a fully homomorphic encryption scheme over the integers. The main appeal of this scheme (compared to Gentry's) is its conceptual simplicity. This simplicity comes at the expense of a public key size in ${\cal \tilde O}(\lambda^{10})$ which is too large for any practical system. In this paper we reduce the public key size to ${\cal \tilde O}(\lambda^{7})$ by encrypting with a quadratic form in the public key elements, instead of a linear form. We prove that the scheme remains semantically secure, based on a stronger variant of the approximate-GCD problem, already considered by van Dijk {\sl et al}. We also describe the first implementation of the resulting fully homomorphic scheme. Borrowing some optimizations from the recent Gentry-Halevi implementation of Gentry's scheme, we obtain roughly the same level of efficiency. This shows that fully homomorphic encryption can be implemented using simple arithmetic operations.
Views: 506 Microsoft Research
Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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How to Backup and Restore your File Encryption Key
 
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Step by step guide on how to Export and Import the O.S Self Signed Certificate (File Encryption Key)
Views: 3399 Peyman Tech Media
Image encryption and embedding in image Matlab
 
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This code reads raw text from an input notepad. It is then encrypted using RSA encryption algorithm. This encrypted text is then hidden in the 8 bit planes of an input grayscale image. This image is then read back, embedded encrypted text from the bit planes are read back, it is then decrypted, then the resulting raw text is displayed. MSE PSNR between original image and encrypted text embedded image is shown. Code will work for any amount of text in the input notepad. There is no limitation. Code can be modified based on customer requirements. If you are interested in buying this code, please drop an email to [email protected], or please visit matlabz.com
Views: 7689 Matlabz T
LOSSLESS AND REVERSIBLE DATA HIDING IN ENCRYPTED IMAGES WITH PUBLIC KEY CRYPTOGRAPHY
 
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Views: 36 KI Tech Solutions
Using Putty Gen to generate Key Pair and login to AWS Image
 
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This video shows how to use Putty Gen to create a Key Pair, upload Public Key into AWS Cloud, use that Public Key to launch an instance, and use the private key to access the VM instance.
Views: 10353 Mohammad Zaman
IEEE 2015-2016 Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography
 
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Those who are all need IEEE 2015-2016 Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography in Asp.Net with full implementation mail to [email protected] or contact +91 8870791415
IEEE 2015 MATLAB LOSS LESS AND REVERSIBLE DATA HIDING IN ENCRYPTED IMAGE IN PUBLIC KEY CRYPTOGRAPHY
 
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To get IEEE 2015-2016 MATLAB LOSS LESS AND REVERSIBLE DATA HIDING IN ENCRYPTED IMAGE IN PUBLIC KEY CRYPTOGRAPHY in MATLAB mail to [email protected] or contact +91 8870791415
Image Cryptography
 
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This dissertion helps people in making image more secure
Views: 492 vinay verma
Cryptography Constructions (Public Key Encryption from trapdoor permutations)
 
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Constructions (Public Key Encryption from trapdoor permutations) To get certificate subscribe: https://www.coursera.org/learn/crypto ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e ======================== About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 85 intrigano
Position-based Cryptography [1/2]
 
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We consider what constitutes identities in cryptography. Typical examples include your name and your social-security number, or your fingerprint/iris-scan, or your address, or your (non-revoked) public-key coming from some trusted public-key infrastructure. In many situations, however, where you are defines your identity. For example, we know the role of a bank-teller behind a bullet-proof bank window not because she shows us her credentials but by merely knowing her location. In this paper, we initiate the study of cryptographic protocols where the identity (or other credentials and inputs) of a party are derived from its geographic location. We explore the possibility of Position
Views: 159 Microsoft Research
VHDL Implementation of Cryptography based Image encryption using Reversible data  LSB algorithm
 
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This paper proposes a lossless, image encryption and decryption using LSB algorithm, and combined reversible data hiding schemes for cipher text images encrypted by public key cryptosystems with probabilistic and homomorphic properties. In the lossless scheme, the cipher text pixels are replaced with new values to embed the additional data into several LSB-Planes of ciphertext pixels by multi-layer images. Then, the embedded data can be directly extracted from the encrypted domain, and the data embedding operation does not affect the decryption of original plaintext image. In the reversible scheme, a pre-processing is employed to shrink the image histogram before image encryption, so that the modification on encrypted images for data embedding will not cause any pixel oversaturation in plaintext domain. Although a slight distortion is introduced, the embedded data can be extracted and the original image can be recovered from the directly decrypted image. Due to the compatibility between the lossless and reversible schemes, the data embedding operations in the two manners can be simultaneously performed in an encrypted image. With the combined technique, a receiver may extract a part of embedded data before decryption, and extract another part of embedded data before decryption, and extract another part of embedded data and recover the original plain text image after decryption. The proposed architecture of this paper will be planned to implement in video and also analysis the logic size, area and power consumption using Xilinx 14.2.
An advanced XOR encryption for image  | Image Processing #9 | HBY coding academic
 
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This video introduces an encryption technique === XOR encryption === the main concept is described below key ⊕ secret = cipher cipher ⊕ key = secret If you have any questions or suggestions Welcome to comment below~ 這支影片將介紹一個加密的技術 === XOR 加密 === 其主要概念如下: 鑰匙⊕秘密=祕文 祕文⊕鑰匙=秘密 如有任何問題或意見,歡迎在下方留言討論~
Views: 103 HBY coding academic
Public Key Cryptosystems: Stronger Security from General Assumptions
 
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Public key encryption (PKE) allows parties that had never met in advance to communicate over an unsafe channel. The notion was conceived in the 1970s, followed by the discovery that one could provide formal definitions of security for this and other cryptographic problems, and that such definitions were achievable by assuming the hardness of some computational problem (e.g., factoring large numbers). For PKE, the most basic security definition -- semantic security -- guarantees privacy, namely that it is infeasible to learn anything about the plaintext from its encryption. However, as cryptographic applications grew more sophisticated, this level of security is often not sufficient, since it does not protect against active attacks arising in networked environments. In this talk I will review some of my work aimed at achieving stronger security notions for public key encryption, including protections against adaptive corruptions, man-in-the-middle attacks (non-malleability), chosen ciphertext security, and, if time allows, tampering attacks. The emphasis of this line of work is on achieving the stronger notion from as general an assumption as possible (e.g., directly from semantically secure PKE), as well as achieving a black box construction, namely using the underlying scheme as a subroutine, without assuming it has any special structure or algebraic properties. This allows for more efficient cryptosystems that can be instantiated with a larger set of assumptions. Based on several joint works with different coauthors. The main part of the talk will be based on joint works with Seung Geol Choi, Dana Dachman-Soled, and Hoeteck Wee.
Views: 76 Microsoft Research
C# Tutorial - Encrypt and Decrypt a String | FoxLearn
 
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How to Encrypt and Decrypt a String in C#. The C# Basics beginner course is a free C# Tutorial Series that helps beginning programmers learn the basics of the C# Programming Language. This is the best way to Learn C# for beginners Encrypt your passwords with MD5 hashing in C# C# Salting & Hashing Passwords C# encrypting and decrypting using AES CBC, safe storing the encrypted data visual C# Adding AES encryption to C# application Forms Application encryption encrypt- decrypt with AES using C# Forms Application Advanced Encryption Standard Rijndael cipher Forms Application C# - Simple AES encryption using Visual C# cryptographic encrypt my 128 bit string using AES encryption cryptography C#
Views: 30493 Fox Learn
PixelEncrypt™ - Simple and Fast Image Encryption
 
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Simple and fast image encryption software optimized for automated use. Available for Windows, Mac OS X or Linux (64-bit). Please visit homepage for trial download: http://www.pixelize.org/pixelencrypt Protect your sensitive images with a simple key combination. In contrast to other encryption softwares, PixelEncrypt is capable of encrypting or decrypting multiple images simultaneously, where decryption is lossless, restoring the complete image in every detail.
A Cryptographic Image Encryption Technique For Facial-Blurring Of Images
 
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A Cryptographic Image Encryption Technique For Facial-Blurring Of Images To get this project in Online or through training sessions Contact: Chennai Office: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai – 83. Landmark: Next to Kotak Mahendra Bank / Bharath Scans. Landline: (044) - 43012642 / Mobile: (0)9952649690 Pondicherry Office: JP INFOTECH, #37, Kamaraj Salai, Thattanchavady, Puducherry – 9. Landline: (0413) - 4204066 / (0)9952649690 Email: [email protected], Mobile: (0)9952649690, Website: http://www.jpinfotech.org Protection of faces in pictures and videos of people in connection with sensitive information, activism, abused cases and others on public broadcasting media and social net-works is very important. On social networks like YouTube, Facebook, Twitter and others, videos are being posted with blurring techniques of which some of them cannot be recoverable. Most blurring techniques used can easily be recoverable using off-the-shelf software. The ones that are difficult to be recovered also can easily be used by abusers and other wrong doers. This paper proposes an image encryption technique that will make it possible for selected facial area to be encrypted based on RGB pixel shuffling of an m*n size image. This will make it difficult for off-the-shelf software to restore the encrypted image and also make it easy for the law enforcement agencies to reconstruct the face back in case the picture or video is related to an abuse case. The implementation of the encryption method will be done using MATLAB. At the end, there will be no change in the total size of the image during encryption and decryption process.
Views: 79 jpinfotechprojects
Visual Cryptography
 
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Hiding your images in style since 1994. Copyright Protection Scheme for Digital Images Using Visual Cryptography and Sampling Methods Ching-Sheng Hsu Young-Chang Hou July 2005 RIT, IMGS-362 Image Processing & Computer Vision II
Views: 25553 Matt Donato
RSA Cipher Explained
 
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Euclid's Algorithm Link: [Coming Soon] in the mean time use this link: http://www.asakusuma.com/euclidean/euclidean.php Another animated attempt of explaining the RSA cipher (public key cryptography aka asymmetric key cryptography). This tutorial includes rules of the cipher followed by an example to clear things up. This video talks mostly about encrypting blocks size of two text and will briefly skim over the methods in encrypting larger block sizes. This was a part of my final year project to create a learning aid. I decided to upload this so the animation won't go to waste. All feedbacks welcome. Do note: this video is meant for people who already have basic knowledge of the RSA cipher and is a part of an application created for my dissertation. Special thanks for Olivia Beck for creating the background image Facebook: http://tinyurl.com/kennyplaysguitar Twitter: https://twitter.com/kenwinlam
Views: 43404 Kenny Luminko
Homomorphic encryption Presentation
 
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Presentation regarding a Masters thesis on Homomorphic encryption and applications. Please refer to https://qdm12.github.io/hbc/ for more information
Views: 1340 Quentin McGaw
WhatsApp Database Encrypt Decrypt Key for WhatsApp Viewer | WhatsApp Tricks & Tweaks
 
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How to Read WhatsApp Database Crypt5 Crypt7 Crypt8.how to read someone's whatsapp messages using WhatsApp database decrypt key.whatsapp messages are saved in database file in msgstore.db format and encrypted in the whatsapp crypt,whatsapp crypt 5,whatsapp crypt 7 and whatsapp crypt 8 (on latest version whatsapp) format. you can find a database files but you can't find key which is requires to decrypt someone messages. here i m going to show you how to anyone's whatsapp database messages on pc. Step to Get WhatsApp Database Decrypt Key connect the phone to the pc browse to phone memory - whatsapp - database and select all and copy it to your pc here we can't able to open this encrypted database to open this database we need whatsapp viewer (whatsapp crypt-db converter) dowload and install the whatsapp viewer the link is given below in the description box now open whatsapp viewer go to file select decrypt.crypt8 and browse the database file which we have copied from the victims phone here the database is encrypted to read the messages we need a key which can decrypt the database files so stay with me i will show you how to get it go to play store and download the ES File Explorer application open the app go to tools and turn on the root explorer to get the root permission for ES Explorer android phone must be rooted now go to local select device browse to data-data-com.whatsapp-files-key copy that key (whatsapp crypt key) to memory card and from external sd card copy it to your pc now use this key to whatsapp viewer to decrypt your database files to view the messages your decrypted database (decrypt whatsapp crypt7,decrypt whatsapp crypt8,decrypt whatsapp database) file is located at the folder where you have save the key drag and drop the decrypted database file to whatsapp viewer and now you are able to read whatsapp crypt8,read whatsapp database crypt8,read whatsapp database messages thanks for watching how to read your whatsapp crypt7 database on your pc using whatsapp viewer. Download WhatsApp Viewer http://andreas-mausch.github.io/whatsapp-viewer/ also watch Latest Android 5.1 Lollipop Features Review 2015 https://youtu.be/FcqehJhq98Y how to use WhatsApp without number https://youtu.be/vNc8uX-meNA how to to upgrade samsung galaxy grand duos gt-i9082/gt-i9082 to android lollipop 5.1 unofficial Cynagonmod CM 12.1 https://youtu.be/KJxeqN5wcvs A New Way to type on android Phone or TAB write using your Handwriting https://youtu.be/IdftXTUJz3Q How to Root Cyanogenmod CM 12.1 Custom ROM https://youtu.be/uLQkJobrM6I How to Install CWM Recovery and Root Android Phone How to Root Almost Any Android Phone CWM Recovery https://youtu.be/B-_K9h4wnR0 How to ROOT Android Phone | Easy Simple Fast https://youtu.be/Rk7BIaUhpQs whatsapp database encrypt decrypt key for whatsapp viewer | WhatsApp Tricks and Tweaks https://youtu.be/bXZuYQ6gdM0 how to use 2 whatsapp in one phone https://youtu.be/EpKunbF784k like comment share subscribe to my channel " Local Guy " https://twitter.com/LocalGuy5 https://www.facebook.com/LocalGuy05 PS :- if you have any queries,suggestions or found any error /mistake regarding tutorial please notice me in the comment section.i will answer all your questions / queries. Thanks. Local Guy A YouTube Channel for Technology,Internet,IT,Software,Programming,Developer,Linux,Networking,Computer,Android,Iphone,iOS,IT Analyst,Data Analyst
Views: 223406 local guy
How the RSA algorithm works, including how to select d, e, n, p, q, and φ (phi)
 
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This video explains how to compute the RSA algorithm, including how to select values for d, e, n, p, q, and φ (phi).
Views: 193141 Anthony Vance
VHDL Implementation of Lossless and Reversible Data Hiding in Encrypted Images with Public Key
 
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VHDL Implementation of Lossless and Reversible Data Hiding in Encrypted Images with Public Key Cryptography Wide Damping Region for LCL-Type Grid-Connected Inverter with an Improved Capacitor-Current-Feedback Method To get this project in ONLINE or through TRAINING Sessions, Contact:JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83. Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry -9. Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com This paper proposes a lossless, a reversible, and a combined data hiding schemes for ciphertext images encrypted by public key cryptosystems with probabilistic and homomorphic properties. In the lossless scheme, the ciphertext pixels are replaced with new values to embed the additional data into several LSB-planes of ciphertext pixels by multi-layer wet paper coding. Then, the embedded data can be directly extracted from the encrypted domain, and the data embedding operation does not affect the decryption of original plaintext image. In the reversible scheme, a preprocessing is employed to shrink the image histogram before image encryption, so that the modification on encrypted images for data embedding will not cause any pixel oversaturation in plaintext domain. Although a slight distortion is introduced, the embedded data can be extracted and the original image can be recovered from the directly decrypted image. Due to the compatibility between the lossless and reversible schemes, the data embedding operations in the two manners can be simultaneously performed in an encrypted image. With the combined technique, a receiver may extract a part of embedded data before decryption, and extract another part of embedded data and recover the original plaintext image after decryption.
Views: 104 jpinfotechprojects
What is Cryptography
 
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www.hiteshChoudhary.com www.newdemy.com What is Cryptography? Cryptography is a very interesting science of information security. The word Cryptography is derived from Greek kryptos, meaning hidden. Cryptography is not alone word or one word for all related information security science. Words like cryptanalysis, cipher and cryptology are always included in this science. Cryptography includes techniques such as microdots, merging words with images, and other ways to hide information in storage or transit. However, in today's computer-centric world, cryptography is most often associated with scrambling plaintext (ordinary text, sometimes referred to as clear text) into cipher text (unreadable text obtained after a process called encryption), then back again (known as decryption). Individuals who practice this field are known as cryptographers. There is also a word, Cryptosystem that you will see a lot in this video course. Procedures and protocols that are used in cryptography makes up a system that is known as cryptosystem. Cryptosystem are mostly referred as computer programs or protocols but I would like it to extend to a much wider plot. It also include human behavior as social engineering is still one of the fastest technique to compromise a system or application. Things like choosing typical password, logging off unused systems, protecting sensitive files also plays a vital role in cryptosystem. Although, it is considered that 1st use of modern cryptography was by Julius Caesar, who did not trust his messenger when communicating with his governors. But I think the need of encryption came in high demand after the invention of radio as one can tune into your frequency range and intercept your message. But if the transmission is encrypted then things get changed. In recent times, cryptography has turned into a battleground of some of the world's best mathematicians and computer scientists. The ability to securely store and transfer sensitive information has proved a critical factor in success in war and business. To understand more about cryptography, let’s call our friends Alice and Bob. Now Alice wants to transfer some information to Bob but wants to do it securely. Alice decided that instead of transferring information in clear text form, I’ll encrypt this text with some algorithm and key. Then I’ll pass this cipher text. Now bob should also have the key and decryption algorithm to read the information. The two major problems are secure transfer of key and knowledge about algorithm. Things like degree of complexity of algorithm and its randomness also plays a vital role in cryptography. This course is going to be a detailed overview about all these things.
Views: 3546 Hitesh Choudhary
Crypto.cat
 
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cc4d73605e19217bf2269a08d22d8ae2 http://creativecommons.org/licenses/by-nc-nd/3.0/ A client-side 4096-bit Diffie-Hellman-Merkle public key agreement engine. A client-side AES-256 implementation is used to encrypt data. HMAC message integrity verification. The identity of chatters can be confirmed via key fingerprints, à la OTR. Uses the Fortuna secure pseudo-randomness generator. Send encrypted .zip files and images. Includes a mobile website compatible with iPhone, Android and BlackBerry. Cryptocat Chrome, a Chrome app that loads all code locally, and is secure from being served compromised code. Chats are securely deleted after one hour of inactivity. Easily invite your Facebook contacts to join your Cryptocat session. Send private messages that can only be seen by a single recipient. A sleek design with time-stamping, optional audio notifications, fluid-window mode, and mobile support. Translations available for French, Catalan, Basque, Italian, German, Portuguese, Russian and Swedish. http://xdtfje3c46d2dnjd.onion/ https://crypto.cat/
Views: 3195 CiphersSon
Lattice-Based Cryptography
 
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We will give a survey of recent work on lattice-based cryptography, mainly focusing on the so-called Learning with Errors (LWE) problem. This problem has turned out to be an amazingly versatile basis for cryptographic constructions, with tens of applications, including the recent celebrated work on fully homomorphic encryption. In addition to applications, we will also mention very recent work providing a better understanding of the security of the problem. The talk does not require any prior knowledge in cryptography or in lattices.
Views: 3293 Microsoft Research
A hybrid genetic algorithm and chaotic function model for image encryption
 
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A hybrid genetic algorithm and chaotic function model for image encryption
Views: 398 Sadique Nayeem
RSA Encryption Matlab code
 
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=================================================== Get the code from here: https://gum.co/vefiy =================================================== This code implements RSA encryption algorithm in matlab which depend on generating very large prime numbers (there is an implemented function to generate the prime numbers randomely), these numbere are used as encryption and decryption keys using the RSA algorithm for encryption and by seperating keys as private and public as explained in the video. The code takes a text file as an input and use the content as the message to be encrypted and then the sent encrypted message along with its decryption is printed. Author: Ahmed Abu Bakr Contact me: email: [email protected] List of all my codes: https://gumroad.com/ahmedsaleh =================================================== Hire me directly on freelancer: https://www.freelancer.com/u/AhmedSobhiSaleh ===================================================
Views: 471 Ahmed Saleh

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