用户A在CA申请了自己的数字证书I，下面的描述中正确的（ ）。
- A.证书I中包含了A的私钥，CA使用公钥对证书I进行了签名
- B.证书I中包含了A的公钥，CA使用私钥对证书I进行了签名
- C.证书I中包含了A的私钥，CA使用私钥对证书I进行了签名
- D.证书I中包含了A的公钥，CA使用公钥对证书I进行了签名
正确答案及解析
正确答案
B
解析
数字证书包含了A的公钥，CA使用自己的私钥对证书进行签名。
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