C＃对SSPI的调用失败，请参阅内部exception – 无法联系本地安全机构
我写了一个C＃程序来连接MySql服务器和’ Mysql Connector / Net ‘。 我使用ssl选项的安全连接。 我太正确地制作了服务器证书和客户端pfx证书。 但是当我试图连接到服务器时，我得到了这个例外。
System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. ---> System.ComponentModel.Win32Exception: The Local Security Authority cannot be contacted --- End of inner exception stack trace --- at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, Exception exception) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessReceivedBlob(Byte[] buffer, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) 我使用的MySql Connector / Net版本支持MySql服务器版本（5.5）（6.9）。
重要提示：它适用于早期的Windows 10，但不适用于Windows 10中的最新版本。 我的朋友在Windows 7和8.1中成功测试了它。 也许Windows更新搞砸了什么。
我在这里读到一个解决方案：必须编辑注册表，但它不起作用。
我遇到了同样的问题，我认为它与Windows 10的最新安全更新有关。当我更改连接字符串以转换为我的连接的SSL加密时，错误消失…编辑：更新mysql后错误解决 – 服务器5.5