一種具有多級安全目標的動態(tài)對稱可搜索加密方案

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關(guān)鍵詞：動態(tài)對稱可搜索加密；多用戶；搜索模式隱藏；訪問模式隱藏；前后向安全；多級安全目標中圖分類號：TP309 文獻標志碼：A 文章編號：1001-3695（2025）07-033-2168-08doi：10.19734/j.issn.1001-3695.2024.10.0434

Abstract：Searchable encryption encryptsdata files before storingthemin the cloudand enables retrievaldirectlyover the ciphertext.Dynamic searchableencryptionfacilitates dynamic updates to cloud-storedfiles.Existing dynamic searchable encryptionschemesprimarilyfocusonaddressingforwardandbackwardsecurity，buttheytypicallysupportonlysingle-usersearches andfail to simultaneouslyprotect searchandaccesspaterns.Inresponse tothese limitations，this paper proposed adynamic symmetric searchable encryption scheme，TS-MDSSE，basedonoblivious key-value store （OKVS）technology.The scheme achieved forward security while hiding both search andaccesspatterns，meeting three security goals.Building on this，it enhanced theupdatealgorithm byemploying randomvaluesubstitution，achieving backward securityandintroducing FSMDSSE，which metfoursecuritygoals.Securityanalysisand experiments demonstrate thatthe proposed schemes fulfillmultilevel security requirements，support multi-user queries，and complete a single search in only O.O22 ms.

Key words：dynamic symmetric searchable encryption；multi-user;search patern privacy；access pattern privacy；forward andbackward security；multilevel securityobjective

0 引言

隨著云計算技術(shù)的廣泛應(yīng)用，個人和企業(yè)為了減輕存儲壓力，將大量的數(shù)據(jù)通過數(shù)據(jù)外包服務(wù)存儲到云服務(wù)器上[1]。（剩余23121字）