Exploring what is inside the ASP.NET Core cookies
What is inside the .AspNetCore.Cookies authentication cookie, the session and antiforgery cookies, how Data Protection encrypts them, and how to look inside.
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Debugging cookie problems in ASP.NET Core
How to debug cookie problems in ASP.NET Core: cookies the browser rejects, cookies missing from requests, lost cookies and the SameSite rules behind them.
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BearerToken: The new Authentication handler in ASP.NET Core 8
How the BearerToken authentication handler in ASP.NET Core 8 works, what its access and refresh tokens contain, and how it compares to Cookie and JwtBearer.
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Debugging JwtBearer Claim Problems in ASP.NET Core
Debug missing claims in ASP.NET Core JwtBearer: inspect the access token, MapInboundClaims, the name and role claim types, and a claims diagnostic endpoint.
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Debugging OpenID Connect Claim Problems in ASP.NET Core
How to fix missing OpenID Connect claims in ASP.NET Core: check the ID token and UserInfo, claim actions, claim mapping, and the name and role claims.
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Troubleshooting JwtBearer authentication issues in ASP.NET Core
How to troubleshoot JwtBearer authentication in ASP.NET Core APIs: 401 vs 403, middleware order, the WWW-Authenticate error details and the authentication logs.
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IdentityServer - IdentityResource vs. ApiResource vs. ApiScope
The difference between IdentityResource, ApiResource and ApiScope in IdentityServer, and how identity scopes, access scopes and API resources shape tokens.
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ASP.NET Core 6 - JwtBearer library: what’s new?
What changed in the ASP.NET Core JwtBearer library from 3.1 to 6: MapInboundClaims, a custom back-channel HttpClient, refresh intervals and token validation.
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How I built my own Sega Mega Drive hardware dev kit from scratch
How I built a Sega Mega Drive dev kit from scratch: reverse engineering the cartridge slot, a homemade logic analyzer, a RAM cartridge and boot firmware.
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TNValidate is now open source
TNValidate, a C# validation library with a fluent interface for defining validation rules, is now open source on GitHub. A short look at how to use it.
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