THE PROTOCOL OF CHAMELEON-SIGNATURE BASED ON THE STANDARD DSTU 4145-2002 USING CHAMELEON-HASH IN THE GROUP OF POINTS ON AN ELLIPTIC CURVE

K.A. Pogrebnyak, Ju.M. Lyenshyna

The protocol of chameleon-signature based on the national standard DSTU 4145-2002 using chameleon-hash in the group of points on an elliptic curve has the properties of non-transferability and message hiding is proposed. The choice of the hash function to a point on an elliptic curve required for the chameleon-signature based on the standard DSTU 4145-2002 is substantiated. Extended protocols of denial signatures for the cases to ensure properties of non-transferability and message hiding are provided. The resistance proof of the proposed chameleon hash protocol and chameleon signatures are provided.

Keywords: chameleon-hash, chameleon signature, the group of points on an EC, map function, digital signature.