@misc{cryptoeprint:2005:215,
author = {Jason E. Holt},
title = {Reconciling CA-Oblivious Encryption, Hidden Credentials, OSBE and Secret Handshakes},
howpublished = {Cryptology ePrint Archive, Report 2005/215},
year = {2005},
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.