Monthly Archives: August 2025

Reset Cookies and force new sign-in using ASP.NET Core Identity

August 18, 2025 · by · in Uncategorized · 3 Comments

This post looks at implementing a cookie reset in an ASP.NET Core application using Duende identity server which federates to Entra ID. Sometimes cookies need to be reset for end users due to size problems, or unknown remote authentication server errors. The cookies can be cleared and a new sign in can be forced. Code: […]

Use EdDSA signatures to validate tokens in ASP.NET Core using OpenID Connect

August 6, 2025 · by · in .NET Core, ASP.NET Core, OAuth2, OpenId, Security, Uncategorized · 1 Comment

Some identity providers use the EdDSA / ED25519 algorithm to sign and issue tokens. This post shows how to validate the tokens using the Nuget package from ScottBrady and ASP.NET Core. Using the default OpenID Connect setup, the keys are not read and the tokens cannot be validated. The error message could return something like […]

Issue and verify credentials using the Swiss Digital identity public beta, ASP.NET Core and .NET Aspire

August 4, 2025 · by · in ASP.NET Core, aspire, e-id, OAuth2, OpenId, Security, Self Sovereign Identity · 6 Comments

This post shows how to issue and verify identities (verifiable credentials) using the Swiss Digital identity and trust infrastructure, (swiyu), ASP.NET Core and .NET Aspire. The swiyu infrastructure is implemented using the provided generic containers which implement the OpenID for Verifiable Credential Issuance and the OpenID for Verifiable Presentations standards as well as many other […]