Abstract: Microcircuit means for the implementation of RSA encryption and decryption transformations are described, which consists of a plurality of units, to which external adders are attached, thereby incorporating the RSA function.
Abstract: In a method for the exponentiation in a finite field GF(2.sup.n) the squaring operation is carried out by constructing a vector, the components of which are in alternation the components of the vector to be squared and the number 0. An apparatus for exponentiation in a finite field GF(2.sup.n), is described.