A New DNA Based Approach of Generating Key Dependent Mix Columns Transformation

Abstract

The use of key-dependent MixColumns can be regarded as one of the applied techniques for changing the quality of a cryptographic algorithm. This article explains one approach for altering the MixColumns transformation engaged in the AES algorithm. The approach employed methods inspired from DNA processes and structure, which relied on the key.The parameters of the proposedMixCloumns have characteristics identical to those of the original algorithm AES besides increasing its resistance against attack.The original transformation uses single static MDS matrix while the proposed methods used dynamic MDS. The security of the new MixColumns was analyzed, and the NIST Test Suite tests were used to test the randomness for the block cipher that used the new transformation.