@misc{cryptoeprint:2010:217,
author = {Daniele Perito and Gene Tsudik},
title = {Secure Code Update for Embedded Devices via Proofs of Secure Erasure},
howpublished = {Cryptology ePrint Archive, Report 2010/217},
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.