对称算法要求消息的发送方和接收方使用同一个秘钥；这通常被称作秘钥密码术。

A symmetric algorithm requires that both the sender and receiver of the message use the same secret key; this is often referred to as secret key cryptography.

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现有两种主要的、相互竞争着的密码术，被称作秘钥（即对称）系统和明钥（即不对称）系统。

The two main competing cryptography schemes are known as the secret-key (symmetric) system and the public-key (asymmetric) system.

youdao

现有两种主要的、相互竞争着的密码术，被称作秘钥（即对称）系统和明钥（即不对称）系统。

The two main competing cryptography schemes are known as the secret-key (symmetric) system and the public-key (asymmetric) system.

youdao