然而，这个策略使用对称加密。

However, this policy USES symmetric encryption.

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对称和非对称加密间的差异

The difference between symmetric and asymmetric encryption

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分组对称加密算法的工作模式对于敏感信息的安全性至关重要。

The operation mode of block cipher algorithm is of vital importance for information security.

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但对称加密的密钥管理较困难，这会成为影响安全和效率的一个因素。

But the key is relatively difficult to manage, which will influence the security and efficiency.

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非对称的加密机制则使得数据加密更具安全性。

The asymmetric encryption mechanism made the encrypted data more secure.

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对称密钥是加密和解密都使用的一个密钥。

A symmetric key is one key that is used for both encryption and decryption.

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对称密钥是加密和解密都使用的一个密钥。

A symmetric key is one key that is used for both encryption and decryption.

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