000 00294nam a2200121Ia 4500
020 _a9788131761663
100 _aWilliam Stallings
245 i _aCryptography and Network security: Principles and Practice
250 _a5th
260 _bPearson
_aNew Delhi
_c2013
300 _a743
942 _cBK
999 _c56963
_d56963