Study of Identity-Based Public Key Cryptosystems

• Main Authors: Shu-Hui Kao, 高淑惠
• Other Authors: Tzong-Sun Wu
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/72918609214169502729

碩士 === 華梵大學 === 資訊管理學系碩士班 === 90 === With the prevalence of the Internet applications and the growth of electronic transactions, the government has devoted itself to the promotion of E-commerce. To make more profits from the market, more and more companies set up their Websites to enable shopping on-line. Consequently, many researchers have devoted themselves to the security issues over the distributed environment. In addition to the digital signature and encryption mechanism which achieve the requirements of confidentiality, data integrity, authenticity, and non-repudiation, user authentication in the Internet application is also vital. The traditional approach that a trust authority distributes the certificate to guarantee the authenticity of the user’s identifier or the public key is inefficient, which increase the costs of the communication, the computation complexity and storage space requirement. Therefore, an identity-based public key system which is referred to as an ID-based public key system is proposed. In such a system, each user’s public key is regarded as his identifier, e.g., the name or the network address which can be used to uniquely identify him. That is, the public key is not required to be verified. To strengthen the application of the ID-based public key system, this thesis proposes an ID-based public key system containing ID-based signature, key exchange and encryption schemes.