Cryptology ePrint Archive: BibTeX Citation of Report 2015/174

@misc{cryptoeprint:2015:174,
    author = {Chenyang Tu and Neng Gao and Zeyi Liu and Lei Wang and Zongbin Liu and Bingke Ma},
    title = {A Practical Chosen Message Power Analysis Method on the Feistel-SP ciphers with Applications to CLEFIA and Camellia},
    howpublished = {Cryptology ePrint Archive, Report 2015/174},
    year = {2015},
    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.