政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/54650

政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/54650

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政大機構典藏 > 資訊學院 > 資訊科學系 > 學位論文 > Item 140.119/54650

请使用永久网址来引用或连结此文件: https://nccur.lib.nccu.edu.tw/handle/140.119/54650

题名:	基於免憑證的定時釋出加密系統以及其在可認證電子郵件系統之應用 Certificateless timed-release encryption and its application to certified email system
作者:	林欣瑤
贡献者:	左瑞麟林欣瑤
关键词:	免憑證加密協定安全性證明 Certificateless Encryption System security analysis
日期:	2011
上传时间:	2012-10-30 11:28:19 (UTC+8)
摘要:	本論文提出了一個免憑證加密系統的方案，並且將此方案實作出來，使得此方案更具實用性。此方案主要架構為免憑證加密系統，利用此系統的特性消除傳統公開金鑰密碼系統中需要公開金鑰憑證認證的麻煩，也不會產生基於身分認證加密系統的私鑰託管問題，有效的結合了兩項系統的優點，並且提高了這兩種系統的安全性及方便性。本論文的協定中，在基於身分認證加密系統的公鑰部分還加入了階級以及時間戳記的概念，用以限制接收方取得部份私鑰的能力，並且也將接收方的部分公鑰加入其中，來增加部份私鑰的安全性。另外此協定也加入了提早解密金鑰的部分，可讓傳送方在傳出密文後更改解密時間，而不需要重新使用新的公鑰加密資訊，便可提早讓接收方取得相對應的明文資訊。 In this paper, we propose a new certificateless public key encryption system, and implement it for securing e-mail systems. Certificateless cryptography, which is in contrast to traditional public key crypto-systems, does not require the use of certificates to guarantee the authenticity of public key. It does rely on the use of a trusted third party (TTP) who is in possession of a master key, just like the identity-based public key cryptography. However, certificateless public key crypto-system does not suffer from the key escrow property, whereas, it is a problem in the identity-based public key crypto-systems. Moreover, in our system, we add some new properties like level and time-stamp to limit the ability of receivers and to promote the safety of the system. Time-stamp ensures that the ciphertext cannot be decrypted before the indicated time and a level ensures that only the user with the corresponding identity and level can decrypt the ciphertext. In addition, a new feature is also introduced which is called the time-release encryption. Time-release encryption allows the encrypter to publish a release key so that the ciphertext can be decrypted by the receiver before the time indicated in the time-stamp when necessary.
參考文獻:	[1] W. Diffie, M. E. Hellman, “New directions in cryptography”, Information Theory 22(6), IEEE Transactions on, pp.644-654 , 1976. [2] D. Boneh, M. K. Franklin, “Identity-based encryption from the weil pairing”, CRYPTO 2001, LNCS 2139, pp.213-229, 2001. [3] S. S. Al-Riyami, K. G. Paterson,”Certificateless public key cryptography”, ASIACRYPT 2003, Springer-Verlag, LNCS 2894, pp. 452-473,2003. [4] A. Shamir, ”Identity-based cryptosystems and signature schemes”, CRYPTO 1985, LNCS 196 ,pp.47-53, 1985. [5] M. Hou, Q. Xu, “Secure and efficient two-party authenticated key agreement protocol from certificateless public key encryption scheme”, NCM 2009, pp.894-897,2009. [6] A. Kihidis, K. Chalkias, G. Stephanides, “Practical implementation of identity based encryption for secure e-mail communication” Panhellenic Conference on Informatics 2010, pp.101-106,2010. [7] A. Shamir, “On the security of DES”. CRYPTO 1985,LNCS 218, pp.280-281,1985. [8] National Institute of standards and Technology, “The advanced encryption standard”, http://csrc.nist.gov/aes/ , 2000. [9] R. L. Rivest, A. Shamir, L. M. Adleman, “A method for obtaining digital signatures and public-key cryptosystems”, Communications, ACM 21(2), pp.120-126, 1978. [10] T. ElGamal,” A public-key cryptosystem and a signature scheme based on discrete logarithms”, CRYPTO 1985, LNCS 196, pp.10-18,1985. [11] Y. H. Hwang, D. H. Yum, P. J. Lee, “Timed-release encryption with pre-open capability and its application to certified e-mail system”, ISC 2005, LNCS 3650, pp.344-358, 2005. [12] M. Geng, F. Zhang, M. Gao, “A secure certificateless authenticated group key agreement protocol”, Multimedia Information Networking and Security 2009, International Conference on , pp. 342−346, 2009. [13] C. Wang, D. Long, Y. Tang, “An efficient certificateless signature from pairings”, Data, Privacy, and E-Commerce, 2007, The First International Symposium on, pp.236-238 ,2007. [14] M. Bellare, P. Rogaway, “Random oracles are practical: a paradigm for designing efficient protocols”, Computer and Communications Security 1993, ACM Conference on, pp.62-73, 1993. [15] 詹省三，可訊息回覆之免憑證簽章機制之研究，國立政治大學資訊科學系碩士論文，2011年 [16] 林欣瑤，左瑞麟，關於免憑證密鑰交換機制的一些安全性分析，全國計算機會議，2011年
描述:	碩士國立政治大學資訊科學學系 99753009 100
資料來源:	http://thesis.lib.nccu.edu.tw/record/#G0099753009
数据类型:	thesis
显示于类别:	[資訊科學系] 學位論文

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