Cryptology ePrint Archive: BibTeX Citation of Report 2015/1005

@misc{cryptoeprint:2015:1005,
    author = {Wenbin Zhang and Chik How Tan},
    title = {Cryptanalysis of Yasuda, Takagi and Sakurai's Signature Scheme Using Invariant Subspaces},
    howpublished = {Cryptology ePrint Archive, Report 2015/1005},
    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.