加解密模块的设计和实现部分主要给出了功能模块的端口和状态机的描述。

The introduction focuses on the description of the port and state machine of the function module.

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我们可以知道，程序要有加密模块、解密模块、子密钥生成模块，这三个模块构成DES算法。

We know that procedures have encryption module, decryption modules for key generating modules, which constitute three modules DES algorithm.

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并针对三种不同长度的密钥进行了加密解密测试，结果表明，所设计的AES算法的加密解密模块完全正确。

According to some tests with different lengths of the keys, the results show that the encryption and decryption module of the designed AES algorithm is completely correct.

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