某Web网站向CA申请了数字证书。用户登录过程中可通过验证（作答此空）确认该数字证书的有效性，以（）。
- A.CA的签名
- B.网站的签名
- C.会话密钥
- D.DES密码
正确答案及解析
正确答案
解析
用户可以使用CA的公钥对证书上的签名进行验证，一旦验证通过，该证书就被认为是有效的，从而该验证网站的真伪。
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