| Summary: | 碩士 === 國立交通大學 === 資訊科學與工程研究所 === 96 === In peer-to-peer network system, services usually fail to provide security and robustness due to the absence of information security. The security weakness is rooted in the server-less architecture and demand for ad-hoc operation scenario. Besides, they also stop us from using scalable key management by traditional symmetric/ asymmetric cryptographic techniques.. We have found that hierarchical identity-based cryptography and distributed key generation scheme provide us possible solution to this problem. In this paper, we present the design of Halo, a hierarchical identity-based public key infrastructure that uses these novel technologies to perform recursive instantia¬tion of private key generators and establish a trust hierarchy with unlimited number of levels. Therefore, The PKI thus enables the employment of hierarchical identity-based public key encryption, signature, and signcryption operation. In addition, pair-wise authenticated key agreement also provided for the protection of peer-to-peer applications.
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