Chin Ji-Jian, Tan Syh-Yuan, Heng Swee-Huay, Phan Raphael C-W
Faculty of Engineering, Multimedia University, 63100 Cyberjaya, Selangor, Malaysia.
Faculty of Information Science and Technology, Multimedia University, Jalan Ayer Keroh Lama, 75450 Bukit Beruang, Melaka, Malaysia.
ScientificWorldJournal. 2014;2014:170906. doi: 10.1155/2014/170906. Epub 2014 May 26.
Security-mediated cryptography was first introduced by Boneh et al. in 2001. The main motivation behind security-mediated cryptography was the capability to allow instant revocation of a user's secret key by necessitating the cooperation of a security mediator in any given transaction. Subsequently in 2003, Boneh et al. showed how to convert a RSA-based security-mediated encryption scheme from a traditional public key setting to an identity-based one, where certificates would no longer be required. Following these two pioneering papers, other cryptographic primitives that utilize a security-mediated approach began to surface. However, the security-mediated identity-based identification scheme (SM-IBI) was not introduced until Chin et al. in 2013 with a scheme built on bilinear pairings. In this paper, we improve on the efficiency results for SM-IBI schemes by proposing two schemes that are pairing-free and are based on well-studied complexity assumptions: the RSA and discrete logarithm assumptions.
安全介导密码学最初由博内等人于2001年提出。安全介导密码学背后的主要动机是能够通过要求安全调解人在任何给定交易中进行合作，即时撤销用户的秘密密钥。随后在2003年，博内等人展示了如何将基于RSA的安全介导加密方案从传统公钥设置转换为基于身份的设置，在此设置下不再需要证书。在这两篇开创性论文之后，其他采用安全介导方法的密码原语开始出现。然而，安全介导的基于身份的识别方案（SM-IBI）直到2013年才由秦等人提出，其方案基于双线性配对构建。在本文中，我们通过提出两种无配对且基于经过充分研究的复杂性假设（RSA和离散对数假设）的方案，改进了SM-IBI方案的效率结果。
