Known-plaintext attack

Glossary 3DES (Triple DES): An enhancement to the original DES algorithm that uses multiple keys to encrypt plaintext. See also DES. AAA: Shorthand for the system controls authentication, authorization, and accountability. Abstraction: A process of viewing an application from its highest-level functions, which makes lower-level functions abstract. Access control: The ability to permit or deny the use of an object (a passive entity such as a system or file) by a subject (an active entity

can be dangerous because with the several hack attacks that a key can be broken. So I have proposed a new mechanism that will replace the text key with the image pixels and can gain high security which cannot be easy to break without prior knowledge. 2. Introduction For the decades to keep data secure and to convey the

and study in securing communication between parties in presence of potential adversaries. A cryptographic algorithm or cipher is a mathematical function used in a plaintext in the encryption and decryption process. A cryptographic algorithm works in combination with a key (number, word, or phrase) to encrypt the plaintext. The same plaintext also

and study in securing communication between parties in presence of potential adversaries. A cryptographic algorithm or cipher is a mathematical function used in a plaintext in the encryption and decryption process. A cryptographic algorithm works in combination with a key (number, word, or phrase) to encrypt the plaintext. The same plaintext also

Everything we use in our daily lives, from devices such as phones, tablets, and computers, to cars, gas stations, and electrical plants, is run by computers. This puts millions and billions of people at risk with impending security attacks just a keystroke away. The threat of an attack or breach in a system puts information security at a premium for many organizations and individuals. Therefore the onus is on businesses and organizations to ensure the confidentiality of information in their possession. Securing

Abstract As known today, Cryptography is the transformation of message under the control of secret key and keeping information secure. The first major event in this history was the definition of the concept of public-key cryptography. What we call public key cryptography was the major issue which was presented in 1976.[1] According to the history of cryptography, Diffie Hellman and Merkle Have become famous as cryptographers who explored the concept of public-key cryptography, while Rivest, Shamir

Techniques for privacy preserving data mining Introduction Data mining techniques provide good results only if input data is accurate. But data collected from users are often inaccurate.Users may deliberately enter inaccurate information if they are asked to provide personal information because of their worry that information may be misused by organisation to harass them. So we need to find data mining techniques that encourages the user to provide accurate information by ensuring them that data

1.0 Introduction Cloud computing is a virtual pool of resources and it provides these resources to users via internet. But it comes with few problems like data privacy, security and reliability etc. The most important problem in all these is security and privacy. Securing the cloud means protecting the databases. We are going to discuss about different security issues occurred in cloud and different cryptographic algorithms which are used to provide security. Due to cloud computing even though the

reflect patterns in the original plaintext. Encryption Algorithm The nature of the algorithm used to combine the key and the plaintext is important. Secrecy is not necessary for strength. Indeed, the procedures used by the most accepted and widely used encryption algorithms are publicly available. Their strength is due not to the secrecy of their procedures, but to the fact that they have been rigorously tested and demonstrated to resist brute-force guessing attacks. Therefore, organizations should

encryption and decryption methods known as a Symmetric key and Public key cryptography. Symmetric key has set of algorithms such as Blowfish, two fish, DES, 3DES, AES etc and on the other hand Asymmetric key has set of an algorithm such as Elliptic curve, Diffie-Hellman, DSA, RSA etc. These symmetric and asymmetric keys have its own advantages and disadvantages. Hybrid cryptography is one of most famous cryptography