Cryptography, An Introduction (E-book)

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1、Cryptography:AnIntroduction(3rdEdition)NigelSmartPrefaceToThirdEditionThethirdeditioncontainsanumberofnewchapters,andvariousmaterialhasbeenmovedaround.•ThechapteronStreamCiphershasbeensplitintotwo.Onechapternowdealswiththegeneralbackgroundandhistoricalmatters,thesecondchapterdealswithmodernc

2、onstructionsbasedonLFSR’s.ThereasonforthisistoaccomodateamajornewsectionontheLorenzcipherandhowitwasbroken.ThiscomplimentstheearliersectiononthebreakingoftheEnigmamachine.IhavealsoaddedabriefdiscussionoftheA5/1cipher,andaddedsomemorediagramstothediscussiononmodernstreamciphers.•IhaveaddedCTR

3、modeintothediscussiononmodesofoperationforblockciphers.ThisisbecauseCTRmodeisbecomingmoreused,bothbyitselfandaspartofmorecomplexmodeswhichperformfullauthenticatedencryption.Thusitisimportantthatstudentsareexposedtothismode.•Ihavereorderedvariouschaptersandintroducedanewpartonprotocols,inwhic

4、hwecoversecretsharing,oblvioustransferandmulti-partycomputation.Thiscomplimentsthetopicsfromthepreviouseditionofcommitmentschemesandzero-knowledgeprotocols,whichareretainedamovedaroundabit.Thusthesecondedition’sPart3hasnowbeensplitintotwoparts,thematerialonzero-knowledgeproofshasnowbeenmoved

5、toPart5andthishasbeenextendedtoincludeothertopics,suchasoblivioustransferandsecuremulti-partycomputation.•ThenewchapteronsecretsharingcontainsacompletedescriptionofhowtorecombinesharesintheShamirsecret-sharingmethodinthepresenceofmaliciousadversaries.Toourknowledgethisisnotpresentedinanyothe

6、relementarytextbook,althoughitdoesoccurinsomelecturenotesavailableontheinternet.WealsopresentanoverviewofShoup’smethodforobtainingthresholdRSAsignatures.•Asmallsectiondetailingthelinkagebetweenzero-knowledgeandthecomplexityclassNPhasbeenadded.Thereasonforincludingextrasectionsetc,isthatweuse

7、thistextinourcoursesatBristol,andsowhenweupdateourlecturenotesIalsoupdatethesenotes.Inadditionatvariouspointsstudentsdoprojectswithus,anumberofrecentprojectshavebeenonmulti-partycomputationandhencethesestudentshavefoundasetofnotesusefulinstartingth