多选题CA机构，又称为证书授权（Certificate Authority）中心，对说法正确的有（）。A在SET交易中，CA对持卡人、商户发放证书，不能对获款的银行、网关发放证书BCA中心为每个使用公开密钥的用户发放一个数字证书，数字证书的作用是证明证书中列出的用户合法拥有证书中列出的公开密钥CCA机构的数字签名使得攻击者不能伪造和篡改证书D作为电子商务交易中受信任的第三方，承担公钥体系中公钥的合法性检验的责任
多选题
CA机构，又称为证书授权（Certificate Authority）中心，对说法正确的有（）。
A
在SET交易中，CA对持卡人、商户发放证书，不能对获款的银行、网关发放证书
B
CA中心为每个使用公开密钥的用户发放一个数字证书，数字证书的作用是证明证书中列出的用户合法拥有证书中列出的公开密钥
C
CA机构的数字签名使得攻击者不能伪造和篡改证书
D
作为电子商务交易中受信任的第三方，承担公钥体系中公钥的合法性检验的责任
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