@misc{cryptoeprint:2005:214,
author = {Sourav Mukhopadhyay and Palash Sarkar},
title = {TMTO With Multiple Data: Analysis and New Single Table Trade-offs},
howpublished = {Cryptology ePrint Archive, Report 2005/214},
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.