Category Security
Secure Angular application using Auth0 and ASP.NET Core with BFF
The article shows how an Angular nx Standalone 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 cookie and anti-forgery tokens […]
Use multiple Microsoft Entra Verified ID credentials in a verification presentation
This post shows how a Microsoft Entra ID verified employee credential can be used together with a self attestation credential to unlock a door. Using this, a person can prove they know a code and prove their employee status. Code: https://github.com/swiss-ssi-group/EntraEmployeeUnlockDoor Get your Verified Employee credential To use this app, the Microsoft Entra employee credential […]
Securing APIs using ASP.NET Core and OAuth 2.0 DPoP
This article shows how an ASP.NET Core application can access an ASP.NET Core API using OAuth Demonstrating Proof-of-Possession (DPoP). This is a really powerful security enhancement which is relatively easy to support. The access tokens should only be used for what the access tokens are intended for. OAuth DPoP helps force this. This solution was […]
Trust phishing resistant MFA for cross tenant users
This article shows how to force phishing resistant authentication for external B2B users using a cross tenant trust. The external users are from a separate tenant and the local tenant needs to trust the multiple factor authentication (MFA) from the other known tenants. This prevents the user having to authenticate again and setup more MFA. […]
Application security context models
This article looks at a new concept for creating application security context models for modern solutions using best practice security. By using security context models in projects, a qualitative and secure authentication solution can be produced quicker and more efficient. At present, too many solution architects try to patch the security architecture after the application […]
Provision Azure IoT Hub devices using DPS and X.509 certificates in ASP.NET Core
This article shows how to provision Azure IoT hub devices using Azure IoT hub device provisioning services (DPS) and ASP.NET Core. The devices are setup using chained certificates created using .NET Core and managed in the web application. The data is persisted in a database using EF Core and the certificates are generated using the […]
Use multiple identity providers from a Blazor WASM ASP.NET Core App secured using BFF
This post shows how to implement a Blazor WASM UI hosted in an ASP.NET Core application using multiple identity providers to authenticate. Two confidential OpenID Connect code flow clients with PKCE are used to implement the Blazor authentication. The Blazor WASM and the ASP.NET Core application are a single security context. This is implemented using […]
Use multiple Azure AD access tokens in an ASP.NET Core API
This article shows how to setup an ASP.NET Core application to authorize multiple access tokens from different Azure AD App registrations. Each endpoint can only accept a single AAD access token and it is important that the other access tokens do not work on the incorrect API. ASP.NET Core Schemes and Policies are used to […]
Switch tenants in an ASP.NET Core app using Azure AD with multi tenants
This article shows how to switch between tenants in an ASP.NET Core multi-tenant application using a multi-tenant Azure App registration to implement the identity provider. Azure roles are added to the Azure App registration and this can be used in the separate enterprise applications created from the multi-tenant Azure App registration to assign users and […]
Is scanning QR Codes for authentication safe?
This article explains why cross device authentication has security issues as it is subject to phishing attacks unless further authentication is used in the client. Scanning QR Codes for authentication does not protect against phishing and leaves the users open to having their session stolen. Phishing There a many forms of phishing and this is […]
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