演示安全令牌已授权应用的一种方式是，添加采用相关联密钥（来自于占有证据令牌）的数字签名。
One way to demonstrate authorized use of a security token is to include a digital signature using the associated secret key (from a proof-of-possession token).
接下来，我们需要为Web服务安全性签名和加密创建密钥和证书。
Next we need to create the keys and certificates for the Web services security signatures and encryption.
密码学是安全技术的核心，其中的加密解密、数字签名、密钥交换等技术是起到保障作用的重要机制。
Cryptography is the core of security technologies, and encryption, decryption, digital signature, key exchange etc. are the important mechanisms to guarantee the safety.
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