Randomization Based Block Cipher with Key Mapped S-Box Selection
Krishna Prasad Nandeti, Anshuman Singh, Mahmoud Yousef · International Journal on Cryptography and Information Security · 2017
This paper proposes a new system of Substitution-Permutation network along with Randomization Expansion of 240 bits of input data. System uses 16 S-Boxes which are selected randomly based on the subkey values throughout 64 rounds of substitution steps. 64 sub-keys are generated during the Substitution-Permutation process. The middletext is transposed based on decimal value of the sub-key generated during the each round.A CBC mode is the best associated with this system.