Author Archives: damienbod

Securing OAuth Bearer tokens from multiple Identity Providers in an ASP.NET Core API

This article shows how to secure and use different APIs in an ASP.NET Core API which support OAuth access tokens from multiple identity providers. Access tokens from Azure AD and from Auth0 can be be used to access data from the service. Each API only supports a specific token from the specific identity provider. Microsoft.Identity.Web […]

Present and Verify Verifiable Credentials in ASP.NET Core using Decentralized Identities and MATTR

This article shows how use verifiable credentials stored on a digital wallet to verify a digital identity and use in an application. For this to work, a trust needs to exist between the verifiable credential issuer and the application which requires the verifiable credentials to verify. A blockchain decentralized database is used and MATTR is […]

Create an OIDC credential Issuer with MATTR and ASP.NET Core

This article shows how to create and issue verifiable credentials using MATTR and an ASP.NET Core. The ASP.NET Core application allows an admin user to create an OIDC credential issuer using the MATTR service. The credentials are displayed in an ASP.NET Core Razor Page web UI as a QR code for the users of the […]

Securing an ASP.NET Core app and web API using windows authentication

This post shows how an ASP.NET Core Web API and an ASP.NET Core Razor page application can be implemented to use windows authentication. The Razor page application uses Javascript to display an autocomplete control which gets the data indirectly from the service API which is protected using windows authentication. The Razor Page application uses the […]

Securing multiple Auth0 APIs in ASP.NET Core using OAuth Bearer tokens

This article shows a strategy for security multiple APIs which have different authorization requirements but the tokens are issued by the same authority. Auth0 is used as the identity provider. A user API and a service API are implemented in the ASP.NET Core API project. The access token for the user API data is created […]

Securing Blazor Web assembly using Cookies and Auth0

The article shows how an ASP.NET Core Blazor web assembly UI hosted in an ASP.NET Core application can be secured using cookies. Auth0 is used as the identity provider. The trusted application is protected using the Open ID Connect code flow with a secret and using PKCE. The API calls are protected using the secure […]

Creating Verifiable credentials in ASP.NET Core for decentralized identities using Trinsic

This article shows how verifiable credentials can be created in ASP.NET Core for decentralized identities using the Trinsic platform which is a Self-sovereign identity implementation with APIs to integrate. The verifiable credentials can be downloaded to your digital wallet if you have access and can be used in separate application which understands the Trinsic APIs. […]

Getting started with Self Sovereign Identity SSI

The blog is my getting started with Self Sovereign identity. I plan to explore developing solutions using Self Sovereign Identities, the different services and evaluate some of the user cases in the next couple of blogs. Some of the definitions are explained, but mainly it is a list of resources, links for getting started. I’m […]

The authentication pyramid

This article looks at the authentication pyramid for signing into different applications. I only compare flows which have user interaction and only compare the 2FA, MFA differences. A lot of incorrect and aggressive marketing from large companies are blurring out the differences so that they can sell their products and so on. When you as […]