@misc{cryptoeprint:2008:397,
    author = {Uttam Kr. Mondal , Satyendra Nath Mandal and  J. PalChoudhury},
    title = {A Framework for the Development Playfair Cipher Considering Probability of Occurrence of Characters in English Literature},
    howpublished = {Cryptology ePrint Archive, Report 2008/397},
    year = {2008},
    url = {http://eprint.iacr.org/2008/397},
}