【摘要】：隨著云存儲的快速普及以及公眾隱私保護(hù)意識的提升,越來越多的隱私數(shù)據(jù)被加密存儲在云上.因而,如何對密文數(shù)據(jù)特別是采用公鑰密碼體制加密的數(shù)據(jù)進(jìn)行高效檢索成為了一個(gè)重要研究內(nèi)容.帶密文等值判定的公鑰加密協(xié)議是其中一種檢索方法,它可以在不泄漏明文內(nèi)容的情況下判定2段密文對應(yīng)的明文是否相同.最近,一系列帶密文等值判定的公鑰加密協(xié)議被提出.然而,在這些協(xié)議中,只用了一個(gè)服務(wù)器來執(zhí)行等值判定操作,不能抵抗惡意服務(wù)器的內(nèi)部關(guān)鍵字猜測攻擊.為了解決這個(gè)問題,首次提出了基于雙服務(wù)器的帶密文等值判定的公鑰加密協(xié)議,并在隨機(jī)預(yù)言機(jī)模型下證明了它的安全性.同時(shí),也對設(shè)計(jì)的協(xié)議進(jìn)行了性能分析,分析表明:該協(xié)議適合資源受限的移動(dòng)設(shè)備.
[Abstract]:With the rapid popularization of cloud storage and the improvement of public privacy awareness, more and more privacy data are encrypted and stored in the cloud. Therefore, how to efficiently retrieve ciphertext data, especially those encrypted by public key cryptosystem, has become an important research content. The public key encryption protocol with ciphertext equivalence determination is one of the retrieval methods. It can determine whether the plaintext corresponding to two ciphertext sections is the same or not without revealing the contents of plaintext. Recently, a series of public-key encryption protocols with ciphertext equivalence decision have been proposed. However, in these protocols, only one server is used to perform the equivalent decision operation, which cannot resist the internal keyword guessing attack of the malicious server. In order to solve this problem, a public key encryption protocol with ciphertext equivalence judgment based on dual servers is proposed for the first time, and its security is proved under the stochastic oracle model. At the same time, the performance analysis of the designed protocol shows that the protocol is suitable for mobile devices with limited resources.
【作者單位】： 軟件工程國家重點(diǎn)實(shí)驗(yàn)室(武漢大學(xué));武漢大學(xué)計(jì)算機(jī)學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(61472287) 湖北省自然科學(xué)基金重點(diǎn)項(xiàng)目(2015CFA068)~~
【分類號】：TP309
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本文編號：2299175