Modification and customization of cryptographic algorithms

摘要

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