For symmetric encryption algorithms, you can use either AES128 or AES256.

对于对称加密算法，您可以使用AES128或AES256。

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It mainly includes symmetric encryption algorithms and asymmetric cryptographic algorithms and protocols.

密码技术主要包括对称密码算法和非对称密码算法及协议。

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It can be divided into two sorts as stream cipher mode and block cipher mode by encrypting mode. The most commonly used symmetric encryption algorithms are almost based on block cipher mode.

对称加密算法从加密模式上可分为流密码(序列密码)和分组密码(块密码)两大类，几乎当前使用的所有对称加密算法都是基于分组密码模式。

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