云存儲環(huán)境下多服務(wù)器的密鑰聚合可搜索加密方案
doi: 10.11999/JEIT180418
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1.
西北師范大學(xué)計(jì)算機(jī)科學(xué)與工程學(xué)院 ??蘭州 ??730070
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2.
甘肅衛(wèi)生職業(yè)學(xué)院 ??蘭州 ??730070
Multi-server Key Aggregation Searchable Encryption Scheme in Cloud Environment
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1.
College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China
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2.
Gansu Health Vocational College, Lanzhou 730070, China
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摘要:
密鑰聚合可搜索加密不僅可以通過關(guān)鍵字檢索密文，還可以減少用戶密鑰管理的代價和安全風(fēng)險(xiǎn)。該文分析了一個可驗(yàn)證的密鑰聚合可搜索加密方案，指出該方案不滿足關(guān)鍵字猜測攻擊，未經(jīng)授權(quán)的內(nèi)部用戶可以猜測其他用戶的私鑰。為了提高原方案的安全性，提出了云存儲環(huán)境下多服務(wù)器的密鑰聚合可搜索加密方案。所提方案不僅改進(jìn)了原方案的安全性問題，還增加了多服務(wù)的特性，提高了上傳和存儲的效率，更適合一對多的用戶環(huán)境。
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關(guān)鍵詞:
- 密鑰聚合 /
- 可搜索加密 /
- 多服務(wù)器 /
- 關(guān)鍵字猜測
Abstract:Key aggregation searchable encryption can not only retrieve ciphertext through keywords, but also can reduce user key management costs and security risks. This paper analyzes a verifiable key aggregation searchable encryption scheme, noting that the scheme does not satisfy keyword guessing attacks, and that unauthorized internal users can guess the private keys of other users. In order to improve the security of the original scheme, a multi-server key aggregation searchable encryption scheme is proposed in the cloud environment. The new scheme not only improves the security of the original solution, but also adds multi-service features, and improves the storage and search efficiency. Therefore, it is more suitable for a one-to-many user environment.
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Key words:
- Searchable encryption /
- Key aggregation /
- Multiple servers /
- Keyword guessing
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表 1 基本運(yùn)算耗費(fèi)的時間(ms)
${T_{{\rm{sm}}}}$ ${T_{\rm a}}$ ${T_{\exp }}$ ${T_{{\rm{mul}}}}$ ${T_p}$ 0.756 0.267 3.756 0.185 3.611 
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表 2 效率對比
方案 加密 陷門生成 安全性 Liu等人方案 $2{T_{{\rm{sm}}}} + 2{T_{\rm a}} + 4{T_{\exp }} + 2{T_{{\rm{mul}}}}{\rm{ + }}3{T_{\rm p}} \ge 28.273$ ${T_{\rm a}} + {T_{{\rm{mul}}}} \ge 0.452$ 低 本文方案 $2{T_{{\rm{sm}}}} + 2{T_{\rm a}} + 5{T_{\exp }} + 6{T_{{\rm{mul}}}} \ge 21.{\rm{936}}$ ${T_{{\rm{sm}}}} + {T_{\rm a}} + 3{T_{\exp }} + 2{T_{{\rm{mul}}}} \ge 12.661$ 高
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