关于数字签名说法错误是“（ ）”。
- A.数字签名可保证信息传输过程中信息完整性
- B.数字签名提供信息发送者身份认证
- C.非对称密钥加密是实现数字签名主要技术
- D.数字签名是将数字摘要用发送者公钥加密，与原文一起传送给接收者
正确答案及解析
正确答案
解析
本题考查数字签名相关概念。利用非对称密钥加密技术可以实现数字签名技术。数字签名技术是发送方将报文摘要用自己私钥加密，并将加密报文摘要同原文一起发送给接收方，接收方只有用发送方公钥才能解密被加密摘要，然后对收到原文产生一个新报文摘要，并与解密摘要对比，如果相同，则说明收到信息是完整，在传输过程中没有被修改，否则说明信息被修改过。同时，由于发送者私钥无法仿冒，发送者不能否认用自己私钥加密发送信息，所以数字签名技术能够保证信息完整性和用户身份确定性。
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