@misc{cryptoeprint:2005:278,
author = {Katja Schmidt-Samoa},
title = {A New Rabin-type Trapdoor Permutation Equivalent to Factoring and Its Applications},
howpublished = {Cryptology ePrint Archive, Report 2005/278},
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.