Development of improved speed aes based on key dependent intra-round operations

摘要

© 2021 Little Lion Scientific.The modern day technological evolution in field of communication, improves our life to significant extent. Most of recent evolution, in communication field is governed by internet; on the other hand, the use of internet puts big concern for data security. The crucial applications like surveillance, medical or military; demands secured image transmission storage. In order to provide security to the images during its transmission, multiple techniques have been developed, in last few decades. AES (Advanced Encryption Standard) is commonly used technique for image security. This work introduces, the development of AES; by making all the intra-round transformations (Sub-byte, Shift row Mix column); as a key dependent transformations, this key dependency of intra-round transformations, results modification in the values of propagation correlation as, 2-150 and 2-75 respectively; these value ensures protection against differential linear attacks. For the development of proposed algorithm, c to VHDL compilation framework based on loop unrolling technique is used. This loop unrolling technique provides higher degree of parallelism for reconfigurable architecture causing the significant increase in the speed of image encryption decryption. So the proposed AES provides high degree of security, that too at high speed but with cost of larger area requirement.