Word-based encryption algorithm using dictionary indexing with variable encryption key length

Message Based Random Variable Length Key Encryption Algorithm

Problem statement: A block ciphers provides confidentiality in cryptography but cryptanalysis of the classical block ciphers demonstrated some old weaknesses grabbing a partial key in any stage of encryption procedure leads to reconstructing the whole key. Exhaustive key search shows that key generation should be indeterminist and random for each round. Matching cipher-text attack shows that la...

A Key Dependent Encryption Algorithm Based on Multiple Bitwise-Shuffling and XOR Variable-Length Partitions

Email: [email protected] Abstract: This new algorithm employs shuffling procedures combined with variable-length key-dependent XOR and S-box substitutions to perform lossless image encryption. This algorithm was implemented and tested by performing different permutations of shuffling, XOR encryption and S-box substitution. Empirical analysis using different types of test images of different s...

Public–Key Encryption using Decoder Algorithm

With the ever increasing confidential data being sent on the fast spreading computer networks the security aspect has become the focal point. One of the methods that has been used for various applications is the public-key encryption technique, which has been used with fair success. However, sound public-key cryptosystems are yet to be developed and a lot of work is focused on to this aspect of...

Cryptanalysis of GSM encryption algorithm A5/1

The A5/1 algorithm is one of the most famous stream cipher algorithms used for over-the-air communication privacy in GSM. The purpose of this paper is to analyze several weaknesses of A5/1, including an improvement to an attack and investigation of the A5/1 state transition. Biham and Dunkelman proposed an attack on A5/1 with a time and data complexity of 239.91and 221.1, ...

A New Fast Data Encryption Algorithm (FDE)