Azure posts

Cross-tenant token attacks are now harder in Azure AD

Posted on: 24-08-2019

Microsoft has improved the security of all APIs using Azure AD authentication and it's awesome, but it doesn't mean you can relax

Always check permissions in tokens in an Azure AD protected API

Posted on: 05-08-2019

Failing to check for permissions in Azure AD access tokens leads to your API being vulnerable

Why you should not put secrets in native applications

Posted on: 29-05-2019

The dangers of embedding secrets in native applications, and how to implement Azure AD authentication there without secrets

Keeping secrets out of version control in .NET applications

Posted on: 26-05-2019

Goes through methods of storing secrets in a way where they cannot end up in the shared code repository

Best practices for N-tenant Azure AD applications

Posted on: 21-05-2019

Some things to watch out for in your multi-tenant Azure AD applications that support a limited number of tenants

Resource Owner Password Credentials grant flow in Azure AD

Posted on: 05-05-2019

What is the OAuth ROPC flow, why it exists, and why you should not use it for most cases

Avoiding wildcard reply URLs with MSAL.js

Posted on: 02-05-2019

Some points on why using wildcards (asterisks) in Azure AD app reply URLs may be a bad idea, and how to do it better

Using groups vs using application roles for authorization in Azure AD apps

Posted on: 21-04-2019

Compares two approaches to high-level authorization in an application: groups and app roles

Using Azure Key Vault and Azure Storage to store Data Protection keys with ASP.NET Core

Posted on: 07-04-2019

A look at how ASP.NET Core's Data Protection can be setup in a good way using Azure services

Exploring the new .NET Cosmos DB SDK (v3)

Posted on: 25-01-2019

Since the new Azure Cosmos DB SDK for .NET is available, I thought I'd look into it and see what's changed.

Hi! My name is Joonas Westlin, I'm a software developer who blogs about ASP.NET, Azure, and Web development.

Azure MVP, Azure Solutions Architect Expert, Azure Developer Associate, MCSE: Cloud Platform and Infrastructure, MCSD: App Builder.