清单6中的示例使用非对称加密技术签署所有消息，提供图书信息。
The Listing 6 example USES asymmetric encryption to sign all the messages providing book information.
非对称加密技术是一种新的加密技术，数字签名是其最重要的应用。
A symmetric cryptography is a new cryptography. Digital signature is the most important application of asymmetric cryptography.
目前有几种加密技术如对称密钥密码系统和非对称密钥密码系统。
Several technologies exist for encryption, such as symmetric key cryptography and asymmetric key cryptography.
目前有几种加密技术如对称密钥密码系统和非对称密钥密码系统。
Several technologies exist for encryption, such as symmetric key cryptography and asymmetric key cryptography.
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