加密与数字签名解决了主动代码的完整性、机密性问题，这里使用解码绑定方式，实现了系统加密方法的可扩展。
The encryption and digital signature solve the problem in integrity and confidentiality of active code. The application of decode-binding realizes the scalability in systematic encryption methods.
加密与数字签名解决了主动代码的完整性、机密性问题，这里使用解码绑定方式，实现了系统加密方法的可扩展。
The encryption and digital signature solve the problem in integrity and confidentiality of active code. The application of decode-binding realizes the scalability in systematic encryption methods.
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