有关公钥基础设施数字证书的签名及认证。有详尽的注释，代码分发送者和接受者两部分。-the public key infrastructure digital certificate authentication and signatures. Details on the Notes, code-sender and the recipient of two parts.

讲述了证书颁发，数字签名，节点与节点间的认证和通信等-About the Certificate, digital signature, between the node and the node authentication and communication, etc.