Cryptology ePrint Archive: BibTeX Citation of Report 2005/023

@misc{cryptoeprint:2005:023,
    author = {Masao Kasahara},
    title = {A Construction of Public-Key Cryptosystem Using Algebraic Coding on the Basis of Superimposition and Randomness},
    howpublished = {Cryptology ePrint Archive, Report 2005/023},
    year = {2005},
    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.