@misc{cryptoeprint:2014:335,
author = {John Almeida},
title = {SHADOW NUMBERS PUBLIC KEY ENCRYPTION},
howpublished = {Cryptology ePrint Archive, Report 2014/335},
year = {2014},
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.