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.