令牌以密码和公共/私有密钥对加密和签名，然后存储在 HTTP cookie 中，最后包括在配置的 SSO 域中的所有请求中。

The token is encrypted and signed by use of a password and a public/private key pair, stored in an HTTP cookie, and included in all requests for the configured SSO domain.

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首先介绍了数据加密的基本原理，包括密钥和两种密码体制然后，给出自行开发的交谈系统作为示例。

First, it introduces the basic principle of the encryption of data, including key and two kinds of cipher system. Then, the chat system developed by us is given as an example.

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第二章介绍基本的应用密码学算法和密码协议，包括对称加密算法、非对称加密算法、散列函数、数字签名技术和密钥管理协议。

In chapter 2, the basic algorithms and protocol of applied cryptography are introduced here, including symmetric-key cryptography, public-key cryptography, hash functions and key management protocols.

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