000 00343nam a2200169Ia 4500
100 _aMartin/Keith M
650 _aCryptography
942 _cBK
366 _f25
654 _acryptography
245 _aEveryday cryptography
260 _bOxford
_c2012
082 _bMAR
300 _a530
546 _aENGLISH
_cComputers
999 _c27880
_d27880