000 00298nam a2200109Ia 4500
008 230222s9999 xx 000 0 und d
100 _aSumita Tyagi
245 0 _aCryptography and Network Security 2nd Ed
250 _a2
260 _bDhanpat Rai Publications Pvt Ltd, New Delhi
_c2011
942 _cBK
999 _c36344
_d36344