PGP (Pretty Good Privacy)是一种电子邮件加密软件包，它提供数据加密和数字签名两种服务，采用（ ）进行身份认证，使用（ ）（128位密钥）进行数据加密，使用（ ）进行数据完整性验证。
问题1选项
A.RSA公钥证书
B.RSA私钥证书
C.Kerboros证书
D.DES私钥证书
问题2选项
A.IDEA
B.RSA
C.DES
D.Diffie-Hellman
问题3选项
A.HASH
B.MD5
C.三重DES
D.SHA-1
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解析
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