000 00313nam a2200121Ia 4500
020 _a9788178089027
100 _aWilliam Stallings
245 _aCryptography and Network Security Principles and Practices
250 _a3rd
260 _c2003
_bPearson Education Asia
_aNew Delhi
300 _axiv+681
942 _cBK
999 _c28248
_d28248