以下关于Kerberos说法错误的有（28）。
- A.Kerberos以对称密码体制为基础。
- B.Kerberos的基本原理是在网络上建立一个集中保存用户名和密码的认证中心KDC（包含认证服务器AS和票证发放服务器TGS），进行用户的身份验证和授权。
- C.Kerberos认证协议是一个较为安全的身份识别协议。
- D.Kerberos认证协议无需第三方进行用户认证。
正确答案及解析
正确答案
解析
Kerberos是一种应用于分布式网络环境、以对称密码体制为基础，对用户及网络连接进行认证的增强网络安全的服务。
Kerberos的基本原理是在网络上建立一个集中保存用户名和密码的认证中心KDC（包含认证服务器AS和票证发放服务器TGS），进行用户的身份验证和授权。Kerberos认证协议是一个较为安全的身份识别协议。它是基于信任第三方，如同一个经纪人集中地进行用户认证和发放电子身份标识。
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