【摘要】：針對用戶動態(tài)可撤銷需要新的數(shù)據(jù)管理員對其前任所管理的數(shù)據(jù)進行完整性驗證的問題,基于單向代理重簽名技術(shù)提出了具有隱私保護的支持用戶可撤銷的云存儲數(shù)據(jù)公共審計方案。首先,該方案中所采用的單向代理重簽名算法,其代理重簽名密鑰由當前用戶私鑰結(jié)合已撤銷用戶公鑰生成,不存在私鑰泄露問題,能夠安全實現(xiàn)數(shù)據(jù)所有權(quán)的轉(zhuǎn)移;其次,該方案證明了惡意的云服務(wù)器不能產(chǎn)生偽造的審計證明響應(yīng)信息來欺騙第三方審計者(TPA)通過審計驗證過程;更進一步,該方案采用了隨機掩飾碼技術(shù),能夠有效防止好奇的第三方審計者恢復(fù)原始數(shù)據(jù)塊。和Panda方案相比較,所提方案在增加抗合謀攻擊功能的基礎(chǔ)上,其審計過程中通信開銷與計算代價仍全部低于Panda方案。
[Abstract]:For users who dynamically undo the problem of requiring a new data administrator to verify the integrity of the data managed by his predecessor, Based on unidirectional proxy resignature technology, a public audit scheme with privacy protection is proposed to support user cancelable cloud storage data. First of all, the one-way proxy resignature algorithm is used in this scheme, whose proxy resignature key is generated by the current user's private key combined with the revoked user's public key, so there is no problem of private key leakage, so the transfer of data ownership can be realized safely. The scheme proves that the malicious cloud server can not produce false audit certificate response information to deceive the third-party auditor (TPA) to pass the audit verification process. Can effectively prevent curious third-party auditors from restoring raw data blocks. Compared with the Panda scheme, the communication overhead and computational cost of the proposed scheme are all lower than that of the Panda scheme.
【作者單位】： 電子科技大學計算機科學與工程學院;成都軍區(qū)聯(lián)勤部后勤信息中心;成都軍區(qū)總醫(yī)院信息科;
【基金】：國家自然科學基金重點資助項目(61370203) 四川省科技支撐計劃項目(2012SZ0162)~~
【分類號】：TP309;TP333
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本文編號：2273545