@misc{cryptoeprint:2006:134,
author = {K. Phani Kumar and G. Shailaja and Ashutosh Saxena},
title = {Identity Based Strong Designated Verifier Signature Scheme},
howpublished = {Cryptology ePrint Archive, Report 2006/134},
year = {2006},
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.