Cryptology ePrint Archive: BibTeX Citation of Report 2012/344

@misc{cryptoeprint:2012:344,
    author = {Masao KASAHARA},
    title = {Construction of New Classes of Knapsack Type Public Key Cryptosystem Using Uniform Secret Sequence, K(II)$\Sigma\Pi$PKC, Constructed Based on Maximum Length Code},
    howpublished = {Cryptology ePrint Archive, Report 2012/344},
    year = {2012},
    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.