基于授權(quán)的多服務(wù)器可搜索密文策略屬性基加密方案

張玉磊; 劉文靜; 劉祥震; 張永潔; 王彩芬

doi:10.11999/JEIT180944

基于授權(quán)的多服務(wù)器可搜索密文策略屬性基加密方案

doi: 10.11999/JEIT180944 cstr: 32379.14.JEIT180944

1.
西北師范大學計算機科學與工程學院 ??蘭州 ??730070
2.
甘肅衛(wèi)生職業(yè)學院 ??蘭州 ??730070

基金項目: 國家自然科學基金(61163038, 61262056, 61262057)，甘肅省高等學?？蒲许椖?2017A-003, 2018A-207)

詳細信息

作者簡介:
張玉磊：男，1979年生，博士，副教授，研究方向為密碼學與信息安全

劉文靜：女，1994年生，碩士生，研究方向為密碼學與信息安全

劉祥震：男，1994年生，碩士生，研究方向為密碼學與信息安全

張永潔：女，1978年生，碩士，副教授，研究方向為密碼學與信息安全

王彩芬：女，1963年生，博士，教授，博士生導(dǎo)師，研究方向為密碼學與信息安全

通訊作者:
劉文靜　lwj19940212@qq.com

中圖分類號: TP309
計量
- 文章訪問數(shù): 2199
- HTML全文瀏覽量: 740
- PDF下載量: 87
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2018-10-10
- 修回日期: 2019-01-19
- 網(wǎng)絡(luò)出版日期: 2019-02-18
- 刊出日期: 2019-08-01

Searchable Multi-server CP-ABE Scheme Based on Authorization

1.
College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China
2.
Gansu Health Vocational College, Lanzhou 730070, China

Funds: The National Natural Science Foundation of China (61163038, 61262056, 61262057), The Higher Educational Scientific Research Foundation of Gansu Province (2017A-003, 2018A-207)

摘要

摘要: 針對現(xiàn)有屬性基可搜索加密方案缺乏對云服務(wù)器授權(quán)的服務(wù)問題，該文提出一種基于授權(quán)的可搜索密文策略屬性基加密(CP-ABE)方案。方案通過云過濾服務(wù)器、云搜索服務(wù)器和云存儲服務(wù)器協(xié)同合作實現(xiàn)搜索服務(wù)。用戶可將生成的授權(quán)信息和陷門信息分別發(fā)送給云過濾服務(wù)器和云搜索服務(wù)器，在不解密密文的情況下，云過濾服務(wù)器可對所有密文進行檢測。該方案利用多個屬性授權(quán)機構(gòu)，在保證數(shù)據(jù)機密性的前提下能進行高效的細粒度訪問，解決數(shù)據(jù)用戶密鑰泄露問題，提高數(shù)據(jù)用戶對云端數(shù)據(jù)的檢索效率。通過安全性分析，證明方案在提供數(shù)據(jù)檢索服務(wù)的同時無法竊取數(shù)據(jù)用戶的敏感信息，且能夠有效地防止數(shù)據(jù)隱私的泄露。
- 云存儲 /
- 授權(quán)服務(wù)器 /
- 可搜索加密 /
- 密文策略屬性基加密 /
- 多屬性授權(quán)機構(gòu)
Abstract: Considering that the existing attribute-based searchable encryption scheme lacks the authorization service to the cloud server, a multi-server searchable Ciphertext Polity Attribute Base Encryption (CP-ABE) scheme is proposed based on authorization. The scheme implements search services through a cloud filter server, cloud search server and cloud storage server cooperation mechanism. The users send the authorization information to the cloud filter server at once, then the server creates the authorization information; The cloud search server creates the trapdoor information based on the trapdoor information sent by the users. Without decrypting the cipher text, the cloud filter server can detect all the cipher texts. Multiple attribute authorities can be used to ensure efficient and fine-grained access under the premise of ensuring data confidentiality, solving the problem of leakage of data user keys. It can improve the data retrieval efficiency when people use the cloud server. Through security analysis, it is proved that the scheme can not steal sensitive information of data users while providing data retrieval services, and it can effectively prevent the leakage of data privacy.
- Cloud storage /
- Authorization server /
- Searchable encryption /
- Attribute-based cipher text policy encryption /
- Multi-attribute authority

HTML全文

圖 1 基于授權(quán)的可搜索CP-ABE模型

下載: 全尺寸圖片幻燈片

圖 2 加密算法及解密算法運算開銷

下載: 全尺寸圖片幻燈片

表 1 不同方案功能對比

方案	支持細粒度訪問	中央授權(quán)機構(gòu)	屬性授權(quán)機構(gòu)	支持多服務(wù)器	支持授權(quán)服務(wù)器
文獻[16]	是	有	單	否	否
文獻[17]	否	無	無	是	否
本文方案	是	無	多	是	是

下載: 導(dǎo)出CSV

表 2 計算開銷表

方案	加密運算量	陷門檢測運算量	解密運算量
文獻[16]	3+P(2n+5)E+(3n+3)M	4P+6E+6M	(n+5)P+(3n+3)E+(5n+4)M
本文方案	+P+(2n+1)E+(2n+1)M	①3+P+(4n+2)E+(4n+2)M②4+P+(8n+4)E+(2n+3)M	2+P+(2n+5)E+(n+1)M

下載: 導(dǎo)出CSV

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