發(fā)布時間：2018-04-23 12:19

  本文選題：密文策略屬性基加密 + 屬性撤銷　； 參考：《南京郵電大學(xué)》2017年碩士論文

【摘要】：迅速發(fā)展的物聯(lián)網(wǎng)、大數(shù)據(jù)、云計算等新技術(shù)不斷深入到學(xué)習(xí)、工作、生活等各個領(lǐng)域,隨之帶來的安全問題和困難挑戰(zhàn)也逐漸增多,傳統(tǒng)的密碼學(xué)技術(shù)已經(jīng)不能完全滿足人們在不同應(yīng)用場景下使用的需要,于是現(xiàn)代密碼學(xué)技術(shù)要求不斷改進和創(chuàng)新。本文從個人健康記錄系統(tǒng)面臨的實際應(yīng)用需求出發(fā),側(cè)重對密文策略屬性基加密方案加以分析與研究,旨在解決屬性撤銷、外包解密、權(quán)重屬性等方面的問題。主要成果如下:(1)通過對諸多密文策略屬性基加密方案的成果進行匯總與分析,從中選取了Waters提出的一個高效的加密方案,采納Ibraimi等人提出的基于中間人的算法思想,提出一個新的基于中間人的密文策略屬性基加密方案,使得該方案同時兼有屬性撤銷和外包解密的功能。該方案中中間人擔(dān)任很重要的角色:一方面,它可以幫助檢測用戶屬性的合法性,實現(xiàn)屬性的撤銷;另一方面,它可以協(xié)助完成大部分解密運算,使得用戶端達到輕量級計算。它的安全性證明是基于選擇明文攻擊的,并且應(yīng)用在個人健康記錄系統(tǒng)中較于其他方案有著更大的優(yōu)勢。(2)借鑒Hur等人提出的密鑰加密密鑰樹的性質(zhì)和馬華等人提出的密文更新和密鑰更新的算法,并引進劉西蒙等人首次提出的權(quán)重屬性的概念,對上面提出的密文策略屬性基加密方案進一步改進。改進后的方案不僅可以保留已有功能,而且可以支持更加細粒度和及時性的屬性撤銷以及良好的體現(xiàn)出屬性的不同權(quán)重,更加適合個人健康記錄系統(tǒng)。
[Abstract]:With the rapid development of the Internet of things, big data, cloud computing and other new technologies continue to penetrate into various fields, such as learning, work, life and so on. With this, the security problems and difficult challenges are also gradually increasing. Traditional cryptography technology can not fully meet the needs of people in different application scenarios, so modern cryptography technology needs to be improved and innovated. Based on the practical application requirements of personal health record system, this paper focuses on the analysis and research of ciphertext policy attribute base encryption scheme, aiming at solving the problems of attribute revocation, outsourcing decryption, weight attribute and so on. The main results are as follows: 1) by summarizing and analyzing the achievements of many ciphertext policy attribute based encryption schemes, we select an efficient encryption scheme proposed by Waters, and adopt the idea of middleman based algorithm proposed by Ibraimi et al. A new ciphertext policy attribute-base encryption scheme based on middleman is proposed, which makes the scheme have the functions of both attribute revocation and outsourcing decryption. The middleman plays a very important role in this scheme: on the one hand, it can help to detect the legitimacy of user attributes and realize the revocation of attributes; on the other hand, it can help to complete most decryption operations and make the client achieve lightweight computing. Its security is proven to be based on selective plaintext attacks, And the application in the personal health record system has more advantages than other schemes. (2) referring to the properties of key encryption key tree proposed by Hur et al and the ciphertext updating and key updating algorithm proposed by Ma Hua et al. The concept of weight attribute proposed by Liu Simon et al is introduced to further improve the encryption scheme of ciphertext policy attribute base proposed above. The improved scheme can not only retain the existing functions, but also support finer granularity and timeliness of attribute revocation and better reflect the different weights of attributes, which is more suitable for personal health record system.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN918.4

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本文編號：1791951