标签: 高级加密标准

OneofthemostwidelyusedblockcipheralgorithmsistheDataEncryptionStandard(DES),adoptedin1977bytheAmericanNationalStandardsInstitute(ANSI).Aftermorethantwentyyearsofusewithcontinuousagingduetoadvancesincryptography,theNationalInstituteofStandardsandTechnology(NIST)onSep-tember12,1997,startedaprocesstostimulatethedevelopmentandsubmissionofalternativestotheDES.Twenty-onealgorithmswereanalyzedinthefirstroundandfivealgorithmswereanalyzedinthesecondround.OnOctober2,2000theNISTannouncedthatthenewencryptiontechnique,namedAdvancedEncryptionStandard(AES),wouldusetheRijndaelalgorithm,designedbytwowell-knownspecialists,JoanDaemenandVincentRijmenfromBelgium.ThenewAESwillbeusedtoprotectsensitiveinformationoffederalcomputersystems,aswellasmanyprivatebusinesses.AN821AdvancedEncryptionStandardUsingthePIC16XXXFUNDAMENTALENCRYPTIONAuthor:CaioGubelOVERVIEWMicrochipTechnologyInc.Throughouthistory,mankindhasfacedtheproblemofstoringandtransmittingsensitiveinformationinawaythatcouldguaranteebothreliableandeasyaccesstoINTRODUCTIONauthorizedpersonsandpreventundueandillegal……