LEADER 01087nam a2200289 i 4500 001 991002739269707536 008 070801s2005 flua b 001 0 eng d 020 $a1584884703 035 $ab13572842-39ule_inst 040 $aDip.to Matematica$beng 082 04$a005.82$222 084 $aAMS 94-01 084 $aLC QA76.9.A25M67 100 1 $aMollin, Richard A.$065944 245 10$aCodes :$bthe guide to secrecy from ancient to modern times /$cRichard A. Mollin 260 $aBoca Raton :$bChapman & Hall/CRC,$cc2005 300 $axx, 679 p. :$bill., ports ;$c24 cm 440 0$aDiscrete mathematics and its applications 504 $aIncludes bibliographical references (p. 605-626) and index 650 0$aComputer security 650 0$aData encryption (Computer science) 907 $a.b13572842$b28-01-14$c01-08-07 912 $a991002739269707536 945 $aLE013 94-XX MOL11 (2005)$g1$i2013000206066$lle013$op$pE72.80$q-$rl$s- $t0$u4$v4$w4$x0$y.i14566102$z27-09-07 996 $aCodes$91219284 997 $aUNISALENTO 998 $ale013$b01-08-07$cm$da $e-$feng$gflu$h0$i0