基于屬性的可驗(yàn)證的代理重加密VerifiableAB-PREforSecurePublicCloudDataSharing_第1頁
基于屬性的可驗(yàn)證的代理重加密VerifiableAB-PREforSecurePublicCloudDataSharing_第2頁
基于屬性的可驗(yàn)證的代理重加密VerifiableAB-PREforSecurePublicCloudDataSharing_第3頁
基于屬性的可驗(yàn)證的代理重加密VerifiableAB-PREforSecurePublicCloudDataSharing_第4頁
基于屬性的可驗(yàn)證的代理重加密VerifiableAB-PREforSecurePublicCloudDataSharing_第5頁
已閱讀5頁，還剩35頁未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡介

VerifiableAB-PREforSecurePublicCloudDataSharingContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions02ContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions03DataStoragePrivacyIntactnessApplicabilityAccessControlLargeServersThinClients

Achievingdataprivacyandfine-grainedaccesscontrol.Applyingtothinclients.Updatingtheaccesscontrol.Tosolvethefollowingissues:Introduction04ContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions05ORANDBobUnionHospitalChiefPhysiciansEncryption:Specifythequalifiedusersbyanaccesspolicyorasetofattributes.Keygeneration:Associatedwithusers’attributecharacteristic.Decryption:Accomplishedonlyifattributesandtheaccesspolicyarematched.UserAUserB

UnionHospitalChiefPhysician

BobAttribute-basedEncryption(ABE)06ORANDBobUnionHospitalUserAUserB

BobAttribute-basedEncryption(ABE)

UnionHospitalChiefPhysician

Bobisinanemergency.AlltheChiefPhysiciansareunavailable.Scenario:ChiefPhysiciansHowtoderiveBob’smedicalrecords?MedicalRecords07ProxyRe-encryption(PRE)UserAUserBProxy

Theproxycannotseetheplaintext.TheproxycannotderivethesecretkeyofUserA.SecurityRequirements:08Attribute-basedPRE(AB-PRE)

Updatingaccesscontrolfromdelegation.Theproxycannotderivetheplaintextandtheprivatekey.AB-PREisdividedintoCP-AB-PREandKP-AB-PRE.09Attribute-basedPRE(AB-PRE)

Liangetal.(ASIACCS’09):ThefirstCP-AB-PRE.Luoetal.(ICICS’10):CP-AB-PREwithmulti-valuepositiveattributes.Yuetal.(INFOCOM’10):KP-AB-PREforuserrevocation.Yuetal.(ASIACCS’10):CP-ABE-PREforattributerevocationbutnotcollusionresistant.Liangetal.(FGCS2014):CCAsecureCP-AB-PREbasedonLSSS.Liangetal.(TIFS2015):CCAsecuresearchableKP-AB-PREintherandomoraclemodel.Assumingtheproxyissemi-trusted!10ContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions11Non-interactiveVerifiableComputation

Gennaroetal.(Crypto’10):VerifyingarbitrarydelegatingcomputationbasedonaFHEscheme.Chungetal.(Crypto’10):ImprovedGennaroetal’sscheme.Parnoetal.(TCC’12):PublicdelegationandpublicverifiabilityfromABEschemes.Goldwasseretal.(Eprint’12):Publicverifiableandsecretdelegatingcomputationforgeneralfunctions.Notsufficientlyefficientandimpractical!12VerifiableOutsourcedComputationforABEGreenetal.(USENIX’11):OutsourcingthedecryptionofABEbykeyblindingtechnique.Laietal.(TIFS2013):VerifiableoutsourceddecryptionforABEwhichdoublesthecomputationandcommunicationcostscomparedtotheunderlyingABEscheme.Linetal.(TIFS2015):GenericconstructionofVO-ABEwheretheinstantiationimprovedtheefficiencyofLaietal.’sscheme.13Disadvantage:Exposureofthekeyblindingfactordirectlyrevealstheprivatekey.ApplyingtoAB-PRE?ContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions14VerifiableAttribute-basedPRE(AB-VPRE)

Updatingaccesscontrolfromdelegation.Theproxycannotderivetheplaintextandtheprivatekey.AB-PREisdividedintoCP-AB-PREandKP-AB-PRE.Verification15ContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions16OurTechniques

CombiningacommitmentschemeandaKDFduringtheencryption.Verificationincludestwosteps:(1)Invarianttest;(2)Correctdetection.Ourtechniques:Theproxyisuntrusted!Verification17ContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREOutlineofourconstructionAlgorithmdescriptions1819AB-KEMSKE+CommitmentKDFKEMDEM+VerifiabilityOutlineofOurConstructionSKRKAB-PREABEKeyblindingmultiplierNewaccesspolicy/attributessetABE20AB-KEMSKE+CommitmentKDFKEMDEM+VerifiabilitySKRKABEKeyblindingmultiplierNewaccesspolicy/attributesetCTRKCT’ProxyAB-PREABEOutlineofOurConstruction21CTRKCSSRCS(proxy)CTCT’CT’Ver:1Ver:2Ver:1CheckingfortheinvariantcomponentsofCT.Ver:2ExaminingthecalculationcorrectnessofCT’.AB-VPREOutlineofOurConstruction22AB-KEMSKE+CommitmentKDFKEMDEM+VerifiabilityEncryptionProxyRe-encryptionDecryptionKeyblindingAccesscontrolUpdateVerificationOutlineofOurConstructionContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREOutlineofourconstructionAlgorithmdescriptions2324AB-KEMSKE+CommitmentKDFKEMDEM+VerifiabilityEncSK=(K,L)RK=(K,L’,Enc’(D,I’_enc))RKGenABEKeyblindingmultiplierDNewaccesspolicy/attributesetREncCT_{I_enc}CT_{I’_enc}RKAlgorithmDescriptions25Ver2+RDecCT_{I_enc},CT_{I’_enc}b=0orb=1?Ver:1⊥b=0RDec(SK’,CT_{I’_enc},b)b=1Pass?⊥NoVer:2MYesVer1AlgorithmDescriptionsContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPRESecurityanalysis

Dataprivacyandverificationsoundness.

WeakMasterkeysecurity.2627SemanticallysecureComputationalhiding+bindingIND-CPAKDFsecureIND-CPA+VerificationSoundnessSecurityAnalysisforAB-VPREAB-KEMSKECommitment

Dataprivacyandverificationsoundness.AB-VPRE28SecurityAnalysisforAB-VPRE

WeakMasterkeysecurity.SelectivelyWeakMasterKeySecuritySelectivelyIND-CPACDHAssumptionAB-VPRENote:ExposureofthekeyblindingmultiplierprovidesnohelpforrevealingtheprivatekeyduetotheCDHAssumption.ContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions2930AB-KEMOne-timepad+PedersenCommitmentKDFKEMDEM+VerifiabilityInstantiationsofAB-VPRESchemesAB-KEMAccesspolicyAB-VPRE-1CP(Liang’09)Non-monotonicAB-VPRE-2CP(Waters’11)LSSSAB-VPRE-3KP(Goyal’06)LSSSContentsIntroductionVerifiableattribute-basedPRE(AB-VPRE)ABE,PRE,AB-PREVerifiableoutsourcedcomputationOurtechniquesOurconstructionofAB-VPREInstantiationsSecurityanalysisAdvantagesofourAB-VPREschemesConclusions3132AdvantagesofOurAB-VPRESchemesFunctionsRe-encryptionverifiability(non-interactive)Accesscontrolupdatefromuntrustedprox

溫馨提示

  • 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 人人文庫網(wǎng)僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

評(píng)論

0/150

提交評(píng)論