@misc{cryptoeprint:2009:092,
author = {Jung Hee Cheon and Jeongdae Hong and Gene Tsudik},
title = {Reducing RFID Reader Load with the Meet-in-the-Middle Strategy},
howpublished = {Cryptology ePrint Archive, Report 2009/092},
year = {2009},
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.