信息系统安全技术中，关于信息认证、加密、数字签名的描述，正确的是 （ ） 。
- A.数字签名具备发送方不能抵赖、接收方不能伪造的能力
- B.数字签名允许收发双方互相验证其真实性，不准许第三方验证
- C.认证允许收发双方和第三方验证
- D.认证中用来鉴别对象真实性的数据是公开的
正确答案及解析
正确答案
解析
完善的数字签名体系应满足以下3个条件:
（1）签名者事后不能抵赖自己的签名。
（2）任何其他人不能伪造签名。
（3）如果当事的双方关于签名的真伪发生争执，能够在公正的仲裁者面前通过验证签名来确认其真伪。
认证又称鉴别、确认,它是证实某事是否名副其实或是否有效的一个过程。
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