@misc{cryptoeprint:2005:421, author = {Michael Backes and Birgit Pfitzmann and Andre Scedrov}, title = {Key-dependent Message Security under Active Attacks -- BRSIM/UC-Soundness of Symbolic Encryption with Key Cycles}, howpublished = {Cryptology ePrint Archive, Report 2005/421}, year = {2005}, url = {http://eprint.iacr.org/2005/421}, }