This Paper presents a systolic architecture for Advanced Encryption standard (AES). Use of systolic architecture has improved the hardware complexity and the rate of encryption/decryption. Similarities of encryption and decryption are used to provide a high performance using an efficient architecture. The efficiency of the design is quite high due to use of short and balanced combinational path...

We show that any encryption/decryption system can be converted to an algorithm which uses roughly three machine operations per bit. We prove that our technique yields an encryption/decryption system which is as secure as the original system provided the plaintext has full-entropy. We then show how to remove the full-entropy assumption. Our techniques speed up software implementations of RSA by ...

Pure position permutation image encryption algorithms, commonly used as image encryption investigated in this work are unfortunately frail under known-text attack. In view of the weakness of pure position permutation algorithm, we put forward an effective decryption algorithm for all pure-position permutation algorithms. First, a summary of the pure position permutation image encryption algorit...

This paper describes very efficient attacks on plain RSA encryption as usually described in textbooks. These attacks exploit side channels caused by implementations that, during decryption, incorrectly make certain assumption on the size of message. We highlight different assumptions that are easily made when implementing plain RSA decryption and present corresponding attacks. These attacks mak...