问题
多项选择题
关于数字证书的原理说法错误的是（）。
A.数字证书采用公钥体制，即利用一对互相匹配的密钥进行加密、解密
B.每个用户自己设定一把公有密钥，用它进行解密和签名
C.当发送一份保密文件时，发送方使用接收方的私钥对数据加密，而接收方则使用自己的私钥解密
D.设定一把公共密钥为一组用户所共享，用于加密和验证签名
答案
参考答案：B, C
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关于数字证书的原理说法错误的是（）。
A.数字证书采用公钥体制，即利用一对互相匹配的密钥进行加密、解密
B.每个用户自己设定一把公有密钥，用它进行解密和签名
C.当发送一份保密文件时，发送方使用接收方的私钥对数据加密，而接收方则使用自己的私钥解密
D.设定一把公共密钥为一组用户所共享，用于加密和验证签名
参考答案：B, C
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