对称算法将使用服务器的数字证书中的公钥。

The asymmetric algorithm USES the public key in the server's digital certificate.

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SSL使用数字证书为加密、服务器验证以及客户机验证(可选)提供密钥交换服务。

SSL USES digital certificates to exchange keys for encryption, server authentication, and optionally, client authentication.

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此时服务器还会发送自己的数字证书。

It's at this time that the server also sends its digital certificate.

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