@misc{cryptoeprint:2010:095,
author = {Kenneth G. Paterson and Gaven J. Watson},
title = {Plaintext-Dependent Decryption: A Formal Security Treatment of SSH-CTR},
howpublished = {Cryptology ePrint Archive, Report 2010/095},
year = {2010},
note = {\url{http://eprint.iacr.org/}},
}
You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.