CAJ | 학술논문

基于椭圆曲线和Weil配对数学理论发明了具体可实施的基于身份密码的技术方案,但其一大缺陷就是密钥更新问题.介绍了一种时间分层的基于身份密码技术的算法和系统,其采用多个主密钥分量,逐级更新用户私钥,与PKG对接的顶级中间设备的帮助密钥更新时间相对较长,而用户终端保存的用户私钥更新时间相对较短,这样既满足了用户私钥更新频度的需要,又不引起系统频繁更新用户私钥所造成的沉重负荷.
기우타원곡선화Weil배대수학이론발명료구체가실시적기우신빈밀마적기술방안,단기일대결함취시밀약경신문제.개소료일충시간분층적기우신빈밀마기술적산법화계통,기채용다개주밀약분량,축급경신용호사약,여PKG대접적정급중간설비적방조밀약경신시간상대교장,이용호종단보존적용호사약경신시간상대교단,저양기만족료용호사약경신빈도적수요,우불인기계통빈번경신용호사약소조성적침중부하.
A practical identity-based cryptography (IBC) scheme is respectively invented, based on elliptic curves and a mathematical construct called the Weil pairing, but a big limitation of it is the key update. Then an algorithm and system of IBC technology based on time hierarchy is introduced, which adopts a number of main key components and gradually updates user's private key. The help key of top middle equipment docking with PKG updates the relatively long time, while the user's private key updates the relatively short time, therefore this meets the user's private key update frequency needs and doesn't bring the heavy burden to the system.