At the beginning of this study, we examine the different methods of
cryptographic algorithm modifications and we separate them into two major categories,
the “internal” and “external” modification. After this, we focus on external algorithm
modification and we propose a multiple encryption scheme for the weigh between
the performance and the security of the algorithm. And finally, we introduce
the concept of dynamic algorithm cascading with which we can increase the
security of multiple encryption.
Subject Classification: cryptographic algorithm, cryptanalytic