IDX10503: Signature validation failed after updating to Owin.Security v 4.0.0
问题 As per subject, I updated the Owin.Security.WsFederation and dependent packages to version 4.0 and I get the error. I did not make any code changes other than changing using Microsoft.IdentityModel.Protocols; to using Microsoft.IdentityModel.Protocols.WsFederation; where is the WsFederationConfiguration class seems to be now. Here is my StartupAuth : public void ConfigureAuth(IAppBuilder app) { app.UseCookieAuthentication( new CookieAuthenticationOptions { AuthenticationType =