The Advanced Encryption Standard (Rijndael) - ….ppt

TheAdvancedEncryptionStandard(Rijndael)Oldstandardinsecureagainstbrute-forceattacksStraightforwardfixesleadtoinefficientTripleDESimplementationsNewtrendsinfastsoftwareencryptionuseofbasicinstructionsofthemicroprocessorNewwaysofassessingcipherstrength•differentialcryptanalysis•linearcryptanalysisAES:WhyanewStandard?Speed-munityStimulatetheresearchonmethodsofconstructingsecureciphersAvoidbackdoortheoriesAES:WhyaContest?AES:GeneralFormEachteamsubmits:DetailedcipherdescriptionJustificationofdesigndecisionsTentativeresultsofcryptanalysisSourcecodeinCSourcecodeinJavaTestvectorsAES:RulesoftheGameRound1,June1998:15CandidatesfromUSA,Canada,Belgium,France,Germany,Norway,UK,Isreal,Korea,Japan,Australia,,SoftwareefficiencyRound2,August1999:5finalcandidatesMars,RC6,Rijndael,Serpent,TwofishSecurity,HardwareefficiencyOctober20001winner:RijndaelBelgiumAES:CandidatesUSA: Mars,RC6,Twofish,Safer+,anada:CAST-256,DealCostaRica:FrogAustralia:LOKI97Japan:E2Korea:CryptonBelgium:RijndaelFrance:DFCGermany:MagentaIsrael,GB,Norway:SerpentAmerica(8)Europe(4)Asia(2)Australia(1)AES:CandidatesSurveyfilledby104participantsoftheSecondAESConferenceinRome,March1999Middle-of-the--256-+--------85AES:CandidatesSurveyfilledby104participantsoftheSecondAESConferenceinRome,March1999OverwhelmingYES:++++++14AES:CandidatesUSAMars-,,’Avignon,,,,,’Connor,,,-RSADataSecurity,-,,-RSATwofish-,,,-Counterpane,-Hi/fn,-BerkeleyAES:Final5