Block Ciphers

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1、BlockCiphersRSALaboratoriesTechnicalReportTR-601Version2.0

2、August2,1995M.J.B.Robshawmatt@rsa.comRSALaboratories100MarineParkwayRedwoodCity,CA94065-1031cCopyright1995RSALaboratories,adivisionofRSADataSecurity,Inc.Allrightsreserved.003-903041-200-000-000iContents1Introduction11.1Notationan

3、dterminology::::::::::::::::::::22Design22.1Confusionanddiusion:::::::::::::::::::::22.2Productciphersanditeration::::::::::::::::::32.3Feistelcipher:::::::::::::::::::::::::::42.4Performanceissues::::::::::::::::::::::::53Cryptanalysis63.1Classesofcryptanalyticattack:::::::::::::::::63

4、.2Workeortandbruteforce:::::::::::::::::::83.3Exhaustivekeysearch::::::::::::::::::::::93.4Dierentialcryptanalysis:::::::::::::::::::::103.5Linearcryptanalysis:::::::::::::::::::::::123.6Otherconsiderations:::::::::::::::::::::::144DES154.1Background::::::::::::::::::::::::::::154.2Des

5、cription::::::::::::::::::::::::::::154.3Controversy::::::::::::::::::::::::::::164.3.1Keysize::::::::::::::::::::::::::164.3.2S-boxes::::::::::::::::::::::::::174.3.3Algebraicstructure::::::::::::::::::::194.3.4Weakkeys:::::::::::::::::::::::::204.4Status:::::::::::::::::::::::::::::::2

6、24.5Reducedroundversions:::::::::::::::::::::234.6Researchdirections::::::::::::::::::::::::245DESvariantsandLucifer265.1DESvariants:::::::::::::::::::::::::::265.2Lucifer:::::::::::::::::::::::::::::::286IDEA296.1Introduction::::::::::::::::::::::::::::296.2Design:::::::::::::::::::::::

7、::::::::306.3Cryptanalysisandstatus:::::::::::::::::::::30iiBlockCiphers7SAFERK-64317.1Introductionanddesign:::::::::::::::::::::317.2Status:::::::::::::::::::::::::::::::328RC5328.1Introductionanddesign:::::::::::::::::::::328.2Status:::::::::::::::::::::::::::::::339Skipjack349.1Introd

8、uction::::::::::::::::::::::::::::349.2Status:::::::::::::::::::::::::::::::3410Otherblockciphers3510.1RC2::::::::::::::::::::::::::::::::3510.2FEAL:::::::::::::::::::::::::::::::3510.3REDOC-II::::::::::::::::::::::::::::3610.4LOKI:::::::::::::::::::::::::::::::3610.5CAST