上公，汉语词汇，拼音shànɡ ɡōnɡ，三公之上为上公。
辫子群上公钥密码系统的安全性不能仅仅依靠共轭问题的难解性。
The security of a braid public key cryptosystem can't depend only on the hardness of conjugacy problems.
本文以昆明市掌鸠河引供水工程上公山隧洞TBM施工为例，阐述了双护盾隧洞掘进机（TBM） 在不良地质条件下施工所遇到的典型问题。
This paper takes the TBM Application in Shanggongshan tunnel as an example, expatiates the typical problems and difficulties encountered during the course of double-shield TBM construction.
发布您的密钥到一个公钥服务器上。
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