On Ciphers Coming to a Stationary State of Random Substitution
Gorbenko I.D., Lisitskiy K.E., Denisov D.S. · Universal Journal of Electrical and Electronic Engineering · 2014
A new method of determining the real number of round cipher transition to indicators of random substitution is proposed. It is based on the accounting of the minimal number only those S-boxes which are used at the first rounds of their transformations and permit to activate all bytes of the latter from the dynamic point of view to the random substitution of cycle transformation. The results of this technique application for evaluation of dynamic indicators of transition to the indicators of random substitution of a number of modern ciphers including the ciphers presented at one time to the Ukrainian competition on the choice of the applicant to the National standard of block cipher.