非对称密钥的一个缺点是加密消息要比对称密钥花费更长的时间，而且加密时间直接与消息的长短成正比。

One disadvantage of asymmetric keys is that they take much longer to encrypt a message than do symmetric keys, and the encryption time is directly proportional to the size of the message.

youdao

非对称密钥的一个缺点是加密消息要比对称密钥花费更长的时间，而且加密时间直接与消息的长短成正比。

One disadvantage of asymmetric keys is that they take much longer to encrypt a message than do symmetric keys, and the encryption time is directly proportional to the size of the message.

youdao