Cryptology ePrint Archive: BibTeX Citation of Report 2015/256

    author = {Yang Lu, Quanling Zhang, Jiguo Li},
    title = {Cryptanalysis of Three Certificate-Based Authenticated Key Agreement Protocols and a Secure Construction},
    howpublished = {Cryptology ePrint Archive, Report 2015/256},
    year = {2015},
    note = {\url{}},

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.

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