| 摘要: |
| 为了解决目前云环境下用户与云端之间进行身份认证时所存在的安全问题和不足,将PTPM(portable TPM)和无证书公钥密码体制应用到云环境中,提出一种用于实现用户与云端之间双向身份认证的方案.与现有方案相比,新方案具有以下特点:在通过建立身份管理机制实现用户和云端身份唯一性的基础上,首先利用PTPM不仅确保了终端平台的安全可信和云端与用户之间认证结果的真实正确,而且支持用户利用任意终端设备来完成与云端的身份认证过程;其次,新方案基于无证书公钥签名算法实现了“口令+密钥”的双因子认证过程;最后,通过安全性理论证明和性能分析,证明所提方案在保证EUF-CMA安全性的同时,显著提高了用户和云端之间身份认证的计算效率. |
| 关键词: 云计算 身份认证 便携式TPM 无证书公钥密码 |
| DOI：10.13328/j.cnki.jos.004992 |
| 分类号: |
| 基金项目:国家自然科学基金(61502486) |
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| ID Authentication Scheme Based on PTPM and Certificateless Public Key Cryptography in Cloud Environment |
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WANG Zhong-Hua1, HAN Zhen1, LIU Ji-Qiang1, ZHANG Da-Wei1, CHANG Liang2
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1.School of Computer and Information Technology, Beijing Jiaotong University, Beijing 100044, China;2.Guangxi Key Laboratory of Trusted Software (Guilin University of Electronic Technology), Guilin 541004, China
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| Abstract: |
| To tackle the problems of security threat and the shortcomings in the process of ID authentication between user and cloud, this paper applies Portable TPM chip and certificateless public key cryptography for the first time to solve the issues in the cloud environment, and proposes a scheme for bidirectional ID authentication between user and cloud. Compared with previous authentication schemes, the proposed scheme has the several advantages. First, based on the unique identity of user and cloud by the identity management mechanism, portable TPM can not only achieves secure and trusted terminal platform, which ensures the authentication result between user and cloud is correct and valid, but also supports the objectives of ID authentication between user and cloud in user's any terminal device. Furthermore, Dual-factor ID authentication (password + key) is implemented with certificateless public key signature algorithm provided by the new scheme. Finally, security proof and performance analysis show that this proposed scheme has the security level of EUF-CMA, and the computation overhead of ID authentication between user and cloud is significantly improved. |
| Key words: cloud computing ID authentication PTPM certificateless public key cryptography |
