Lecture Notes in Computer Science 3006 CommencedPublicationin1973 FoundingandFormerSeriesEditors: GerhardGoos,JurisHartmanis,andJanvanLeeuwen EditorialBoard: TakeoKanade CarnegieMellonUniversity,Pittsburgh,PA,USA JosefKittler UniversityofSurrey,Guildford,UK JonM.Kleinberg CornellUniversity,Ithaca,NY,USA FriedemannMattern ETHZurich,Switzerland JohnC.Mitchell StanfordUniversity,CA,USA OscarNierstrasz UniversityofBerne,Switzerland C.PanduRangan IndianInstituteofTechnology,Madras,India BernhardSteffen DortmundUniversity,Germany DemetriTerzopoulos NewYorkUniversity,NY,USA DougTygar UniversityofCaliforniaatBerkeley,CA,USA MosheY.Vardi RiceUniversity,Houston,TX,USA 3 Berlin Heidelberg NewYork HongKong London Milan Paris Tokyo Mitsuru Matsui Robert Zuccherato (Eds.) Selected Areas in Cryptography 10th Annual International Workshop, SAC 2003 Ottawa, Canada, August 14-15, 2003 Revised Papers 1 3 VolumeEditors MitsuruMatsui MitsubishiElectricCorporation 5-1-1Ofuna,Kamakura,Kanagawa,247-8501Japan E-mail:[email protected] RobertZuccherato EntrustInc. 1000InnovationDrive,Ottawa,Ontario,CanadaK2K3E7 E-mail:[email protected] LibraryofCongressControlNumber:2004102410 CRSubjectClassification(1998):E.3,D.4.6,K.6.5,F.2.1-2,C.2.0,H.4.3 ISSN0302-9743 ISBN3-540-21370-8Springer-VerlagBerlinHeidelbergNewYork Thisworkissubjecttocopyright.Allrightsarereserved,whetherthewholeorpartofthematerialis concerned,specificallytherightsoftranslation,reprinting,re-useofillustrations,recitation,broadcasting, reproductiononmicrofilmsorinanyotherway,andstorageindatabanks.Duplicationofthispublication orpartsthereofispermittedonlyundertheprovisionsoftheGermanCopyrightLawofSeptember9,1965, initscurrentversion,andpermissionforusemustalwaysbeobtainedfromSpringer-Verlag.Violationsare liableforprosecutionundertheGermanCopyrightLaw. Springer-VerlagisapartofSpringerScience+BusinessMedia springeronline.com (cid:2)c Springer-VerlagBerlinHeidelberg2004 PrintedinGermany Typesetting:Camera-readybyauthor,dataconversionbyDA-TeXGerdBlumenstein Printedonacid-freepaper SPIN:10996386 06/3142 543210
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