When a user's identity is verified by the CA, the certificate uses the holder's public encryption key to protect this data.

当认证机构确认了用户的身份后，电子证书使用证书持有者的公共密钥来保护数据。

youdao

One of the more common security systems used is PKI (Public Key Infrastructure), an encryption used for PDA and smart-phone security.

使用的更公用安全性系统之一是PKI(公用密钥基础)，一种用于PDA和智能电话安全性的加密技术。

youdao

See Resources for links to more information on digital certificates and public-key encryption in general.

参见 参考资料 获得有关数字证书和公开密匙加密的更多信息的链接。

youdao

But for most encryption systems, especially the Public Key systems that are widely used by the banks, you need to know very sophisticated number theory, analytic number theory, elliptical theory.

NPR: The Math Behind Pellicano's Code

Whitfield Diffie, Martin Hellman, and Ralph Merkle developed public key cryptology, the basis of all Internet encryption.

FORBES: You've Never Heard of Them, but They've Changed Your Life