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

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

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How does Remote Credential Guard Work?

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

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Windows Hello Cloud Trust

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Windows Hello Cloud Trust simplifies deployment considerably.

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Why We Built Azure AD Kerberos

Published Dec 2, 2021

Why do we need Azure AD Kerberos?

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I block every thread reader to force you to come here.

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How Azure AD Kerberos Works

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

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On Computer Passwords

Published Sep 23, 2021

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

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A Bit About the Local Security Authority

Published Aug 5, 2021

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

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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.

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Killing NTLM is Hard

Published May 5, 2021

The NTLM authentication protocol just won't die.

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Lessons in Disabling RC4 in Active Directory

Published Mar 2, 2021

Customer lessons learned when disabling RC4 in Active Directory.

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Protecting Against Credential Theft in Windows

Published Feb 12, 2021

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

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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.

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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.

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