@misc{cryptoeprint:2004:012, author = {Maria Isabel Gonzalez Vasco and Rainer Steinwandt }, title = {Pitfalls in public key cryptosystems based on free partially commutative monoids and groups }, howpublished = {Cryptology ePrint Archive, Report 2004/012}, year = {2004}, url = {http://eprint.iacr.org/2004/012}, }