1. B. Barak, M. Prabhakaran, A. Sahai, Concurrent non-malleable zero-knowledge, Cryptology ePrint Archive, Report No. 2006/355, Extended abstract appears in FOCS 2006
2. M. Blum, Coin flipping by telephone, in: Proc. IEEE Spring COMPCOM, 1982, pp. 133–137
3. M. Blum, How to prove a theorem so no one else can claim it, in: Proceedings of the International Congress of Mathematicians, Berkeley, California, USA, 1986, pp. 1444–1451
4. On defining proofs of knowledge;Bellare,1992
5. M. Bellare, O. Goldreich, On probabilistic versus deterministic provers in the definition of proofs of knowledge, Electronic Colloquium on Computational Complexity, 13 (136), 2006, Available also from Cryptology ePrint Archive, Report No. 2006/359