资源描述：
《Privacy homomorphisms》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、PrivacyhomomorphismsRÉKALIMBEK,PÉTERSZIKLAIEötvösLorándUniversity,FacultyofNaturalSciences,DepartmentofInformationSystems,DepartmentofComputerSciencelreka@elte.hu,sziklai@cs.elte.huReviewedKeywords:datasecurity,calulation-anddata-delegation,codingCryptographichomomorphismsareusedtocha
2、rgeacompanywithperformingcalculationswherebothinputandoutputdataareconfidentandthereforecanbecommunicatedincryptographicwaysonly.Thisrequirestheuseofspecialcryptographysothatoperationscanbeperformedoncodeddataanddecodingtheresultsonegetsthesameresultasifthecalculationweremadewithuncod
3、eddata.Thisisthemainpointofthearticlewhichalsointroducesbasicmethodsandpossibleattacks.IntroductionDatadelegationtypicallyoccursinthecaseoforga-nisationshavingafederal-likestructure.Thestatead-PrivacyhomomorphismswereintroducedbyRivest,ministrationhasgenerallyastructurelikethis,butequ
4、-AdlemanandDertouzos[6]in1978tosolvethecom-allyadequateexamplesaretheEuropeanUnionortheputingdelegationprobleminthefirstinstance.Thistyp-UnitedStatesofAmerica.Eachmemberstatehasitsicallyoccurswhenthedataownerhasonlylimitedcom-owndata(budget,registrationofthepopulation,etc.),putingfaci
5、lities,i.e.eitherthecomputationtobeper-whichacentralorganisationwouldliketouseforana-formedistoocomplexoranunmanageablebulkoflysingpurposes.Inreturnforsupplyingthedatathedatamustbeprocessed.Inthiscase,theowneriscon-memberstatescanrequiretheopportunitytoanalysestrainedtodeliverhisdatat
6、oacomputercentre(datathecollecteddata.Becauseofdataprotectionconsid-manager)thatisabletoperformthenecessarycompu-erations,however,theyhavenopossibilitytostoreda-tations.Ifthedataaresensitive,i.e.ofaconfidentialtaofothermemberstates,andhaveneitherthecom-nature,thereistheobviousproblemt
7、hattheycouldputingcapacitytoperformthenecessaryoperations.Ingetintoanenvironmentwhichisnotnecessarilyreli-turn,thecentralorganisation,whichisnotfacinganyofable.theseproblems,hasnoexcesscapacitytoperformforThissituationemergesinrelationofagreatnumbereachmemberstatethecomputingtasktheyo
8、rdere
