@misc{cryptoeprint:2010:544,
author = {Benny Applebaum and Danny Harnik and Yuval Ishai},
title = {Semantic Security Under Related-Key Attacks and Applications},
howpublished = {Cryptology ePrint Archive, Report 2010/544},
year = {2010},
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.