First of all, the article discusses some normal kinds of encryption technology. Through the analysis of encryption, it introduces the basic principles of public key infrastructure and emphasizes on the RSA and its safety.

• 首先，本文对各种常见的加密技术进行了深入探讨，通过对对称加密和公开密钥加密的分析，介绍了公开密钥体系的基本原理，同时重点讨论了RSA公开密钥算法及其安全性。