000			00397 a2200157 4500
020			_a8178086050
082			_a005.82 _bSTA
090			_c324 _d361
100			_aStallings, William
245			_aCryptography and network security _bprinciples and practice
250			_a2nd
260			_aNew Delhi _bPearson _c1999 _g1999
300			_axvii, 569p. _c23cm.
650			_aDATA SECURITY
942			_cSR
999			_c29527 _d29527