Posted in Authentication

Understanding Windows Authentication

Published Jun 13, 2022 | Posted in Authentication

So, you want to understand all the fiddly bits about authentication in Windows? Read Article

About Steve Syfuhs

Steve Syfuhs is a developer on the Windows Cryptography, Identity, and Authentication team at Microsoft building authentication stuff for all your favorite operating systems.

Kerberos Event ID 27

Published Nov 24, 2022

Windows system Event 27 is raised when Kerberos can't find a key.

Read Article | Windows

How does Remote Credential Guard Work?

Published Feb 26, 2022

Remote Credential Guard is a secure way of connecting to RDP servers.

Read Article | Windows

Windows Hello Cloud Trust

Published Feb 22, 2022

Windows Hello Cloud Trust simplifies deployment considerably.

Read Article | Windows

Why We Built Azure AD Kerberos

Published Dec 2, 2021

Why do we need Azure AD Kerberos?

Read Article | Authentication

How Azure AD Kerberos Works

Published Dec 1, 2021

Azure AD Kerberos is a modern form of Kerberos for hybrid environments.

Read Article | Windows

On Computer Passwords

Published Sep 23, 2021

Computer accounts have passwords. Here's some facts about them.

Read Article | Authentication

A Bit About the Local Security Authority

Published Aug 5, 2021

The Local Security Authority is what oversees the security in Windows.

Read Article | Windows

MFA is Hard to do Right

Published May 7, 2021

MFA is critical to securing the world, but it's hard to do right. Here's why.

Read Article | Authentication

Killing NTLM is Hard

Published May 5, 2021

The NTLM authentication protocol just won't die.

Read Article | Windows

Protecting Against Credential Theft in Windows

Published Feb 12, 2021

Going passwordless is an integral part of eliminating credential theft. Here's why.

Read Article | Authentication

How Managed Service Accounts in Active Directory Work

Published Feb 4, 2021

Managed Service Accounts in Windows allow administrators to automate password management for accounts. Here's how they work.

Read Article | Active Directory

OPS108: Windows authentication internals in a hybrid world

Published Feb 2, 2021

I recently recorded a presentation on the internals of hybrid Windows authentication. Go watch it.

Read Article | Windows

Identity Delegation in Active Directory

Published Jan 26, 2021

Active Directory delegation is an often misunderstood technology. Here's an in-depth look at how it works.

Read Article | Security

Hybrid Authentication with FIDO

Published Jan 19, 2021

FIDO is how we're tackling passwordless authentication. Have you ever wondered how it works?

Read Article | Windows

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