@misc{cryptoeprint:2003:014,
author = {Palash Sarkar},
title = {Hiji-bij-bij: A New Stream Cipher with a Self-Synchronizing Mode of Operation},
howpublished = {Cryptology ePrint Archive, Report 2003/014},
year = {2003},
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.