Geodesic
A randomized analog of Chaum --- van Antwerpen undeniable signature
Prikladnaâ diskretnaâ matematika, no. 3 (2022), pp. 40-51

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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.
Keywords: digital signature, undeniable signature, elliptic curve. 
@article{PDM_2022_3_a2,
     author = {P. A. Polyschuk and A. V. Cheremushkin},
     title = {A randomized analog of {Chaum} --- van {Antwerpen} undeniable signature},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {40--51},
     publisher = {mathdoc},
     number = {3},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2022_3_a2/}
}
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P. A. Polyschuk; A. V. Cheremushkin. A randomized analog of Chaum --- van Antwerpen undeniable signature. Prikladnaâ diskretnaâ matematika, no. 3 (2022), pp. 40-51. http://geodesic.mathdoc.fr/item/PDM_2022_3_a2/