A novel method of improvement in advanced encryption standard algorithm with dynamic shift rows, sub byte and mixcolumn operations for the secure communication

摘要

In this digital information era, data transmitted over internet is vulnerable to several types of attacks. To preserve our information over internet, it is necessary to use some cryptographic methods, advanced encryption standard is a strong symmetric, non-fiestel cryptographic algorithm which preserves the information transmitted in internet from piracy or attacks. In this research article, a new and an efficient key dependent AES algorithm is presented for securing the data over internet or digitally stored in any remote location. This proposed work gives better avalanche effect and strict avalanche effect on comparing with the original existing AES algorithm. Results of the proposed algorithm are obtained after testing 1000 pairs of samples of different secret key. And it shows that 58% of the times, new proposed algorithm have better avalanche effect than the existing algorithm.