00314pam a2200121 a 4500020002000000041000500020082001600025100001800041245007100059260002900130300001600159653001700175  a9783540691990c  h  a005.82bBAL  aBaldoni, M W.  aElementary Number Theory Cryptography and CodeshTextual Documents  aNew YorkbSpringerc2009  a522:c24cm.  aCryptography