这是最新的openssl学习的材料，是源代码，相信朋友们以前看过的都知道，这在网络方面很有用的。-This is the latest openssl learning opnenssl, is the source code, I believe that friends who have seen before, all know that this very useful in networking.

The Protocols secure networking

物联网与数据标签的经典材料，通俗易懂，每一章，每一个知识点都有详细的说明。特别适合初学者学习，进步和提高。-Networking and data labels classic material, easy to understand, each chapter, each knowledge has a detailed descr iption. Particularly suitable for beginners to learn, progress and improvement.