00485    a2200157   4500001000700000003000400007005001700011008004100028020001800069082001600087100002400103245008100127260003200208300001400240490007300254131538OSt20210914154745.0                                          a9781439825709  a005.82bM1I1 aMcAndrew, Alasdair 1 aIntroduction to cryptography with open source softwarecby Alasdair McAndrew  aBoca RatonbCRC Pressc2011  axv, 441p.  aDiscrete mathematics and its applications/edited by Kenneth H. Rosen