@misc{cryptoeprint:2013:437,
author = {Salil Vadhan and Colin Jia Zheng},
title = {A Uniform Min-Max Theorem with Applications in Cryptography},
howpublished = {Cryptology ePrint Archive, Report 2013/437},
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.