Modification Advanced Encryption Standard for Design Lightweight Algorithms

Abstract

The acknowledgment of IoT requires a colossal measure of sensor hubs which have limited battery power, memory, computational latency and communication bandwidth to obtain contributions from the associated objects. In the current developments of the resource constraint environments, the trend is shifted towards lightweight cryptographic algorithm. Many lightweight cryptographic algorithms have been developed and also existing algorithms are modified in terms of resource constraint environment. In this paper we analyzed a very popular block cipher AES-128 and tried to make it lightweight regarding energy consumption. In modified AES algorithm an execution of the AES mix columns operation is proposed, combine the add round - key operation with mix - columns to perform in one cycle, the shift - row operation has been modified to shift - rows and shift - columns and reduction in number of rounds to 6 rounds only for modified AES and compare the results of standard algorithm and modified algorithms. The proposed algorithms passed the statistical test suite, also the new algorithms faster than standard AES in term of implementation. In security term the modified algorithm for 6 round has more confusion and diffusion percent because of the modified in mix-columns and shift-rows operations.