Recently, a new scheme was proposed for deniable authentication. Its main originality lied on applying a chaos-based encryption-hash parallel algorithm and the semi-group property of the Chebyshev chaotic map. Although original and practicable, its insecurity and inefficiency are shown in this paper, thus rendering it inadequate for adoption in e-commerce.
Cite
@article{arxiv.nlin/0412023,
title = {Security problems with a chaos-based deniable authentication scheme},
author = {G. Alvarez},
journal= {arXiv preprint arXiv:nlin/0412023},
year = {2007}
}