000 00240nam a2200109Ia 4500
020 _a9814035890
082 _a005.82
100 _aSTALLING, WILLIAM
245 _aCRAPTROGRAPHIC AND NETWORK SECURITY
260 _aPHI
_b PHI
_c1999
942 _cBK
999 _c6798
_d6798