A symmetric key is dynamically created and used for encrypting a database backup image.

为数据库备份映像加密时，将动态创建并应用一个对称密匙。

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The process involves the sender generating the message digest, then encrypting the digest using its private key to create the digital signature.

这个过程包括发送方生成消息摘要，然后用其私钥对摘要加密以创建数字签名。

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Using private key-certificate pairs for signing and encrypting messages is more complex to configure than the simple UsernameToken example.

与简单的UsernameToken示例相比，使用私有密钥-证书对进行消息签名和加密的配置比较复杂。

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For example, encrypting data with the private key creates, a file that can be decrypted by anyone with the public key but that could only have been made by the private key holder.

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