A protocol for designated confirmer signatures based on RSA cryptographic algorithms

It's essential on algorithm design of designated confirmer signatures to construct proofs satisfying security requirements such as unforgetablility, non-transferability, invisibility and zero-knowledge. A designated confirmer signature protocol (RSA-DCSV) is proposed, based on RSA encryption and signature schemes in forms of RSA extended modular computations. Proofs for a designated verifier are considered. Security analysis on RSA-DCSV is also addressed.