Several variants of new digital signature schemes (DSS) based on the discrete logarithm and factorization problems have been proposed. Considered DSS are characterized in that a novel mechanism of the signature generation is used, in which two parameters of the (k, S) or (R, S) signature are defined after solving a system of two congruences. In the case of composite modulus additional restrictions conditions have been introduced for selection of the public key.
Alexander A. Moldovyan, Dmitriy N. Moldovyan, L. V