There are finding characteristics of a effectiveness encryption in 64-bites computer systems in this note. This encryption based on nested substitution-permutation networks and use 16-bites substitution boxes. The lenght of this network is 128 bites. The characteristics of the effectiveness encryption finding as a function of a cryptographic security and a number of operations for implementation this transformation in computer systems.
cryptographic security, nested substitution-permutation network, substitution box, maximal distance code