000 00300nam a2200121Ia 4500
999 _c33361
_d33361
020 _a9788177580112
100 _aWilliam Stallings
245 _aCryptography and Network Security Principles and Practices
250 _a3
260 _c2005
_bPEARSON EDUCATION
_aDelhi
300 _a686
942 _cREF