A randomized analog of Chaum - van Antwerpen undeniable signature
Pavel A. Polyschuk, Alexandr V. Cheremushkin · PRIKLADNAYa DISKRETNAYa MATEMATIKA · 2022
We suggest an elliptic curve modification of the undeniable signature introduced by D. Chaum and H. van-Antwerpen. The signature generation algorithm is supplemented with a preliminary stage of randomization. For signature verification and disavowal protocols, two options are offered. Theorems showing that these protocols meet their purpose have been proven. A method for converting an undeniable signature into a regular digital signature is described, illustrated by the Schnorr electronic signature scheme as an example.