000 00309nam a2200121Ia 4500
999 _c30131
_d30131
020 _a9788178089027
100 _aWilliam Stallings.
245 _aCryptography and Network security: Principles and Practice
250 _a3
260 _c2005
_bPEARSON EDUCATION
_aNew Delhi
300 _a xiv+681
942 _cBB