@misc{cryptoeprint:2013:161,
author = {Daniel Kraschewski},
title = {Completeness Theorems for All Finite Stateless 2-Party Primitives},
howpublished = {Cryptology ePrint Archive, Report 2013/161},
year = {2013},
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.