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By Steve Syfuhs
Understanding Windows 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
Steve Syfuhs
About Steve Syfuhs

Steve Syfuhs is a developer on the Windows Authentication team at Microsoft.

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Kerberos Event ID 27

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?

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

Windows Hello Cloud Trust

Published Feb 22, 2022
Windows Hello Cloud Trust simplifies deployment considerably.
Read Article | Windows
Why We Built Azure AD Kerberos

Why We Built Azure AD Kerberos

Published Dec 2, 2021
Why do we need Azure AD Kerberos?
Read Article | Authentication
Why Thread Readers are Blocked

Why Thread Readers are Blocked

Published Dec 2, 2021
I block every thread reader to force you to come here.
Read Article | Twitter Thread
How Azure AD Kerberos Works

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

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

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

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

Killing NTLM is Hard

Published May 5, 2021
The NTLM authentication protocol just won't die.
Read Article | Windows
Lessons in Disabling RC4 in Active Directory

Lessons in Disabling RC4 in Active Directory

Published Mar 2, 2021
Customer lessons learned when disabling RC4 in Active Directory.
Read Article | Active Directory
Protecting Against Credential Theft in 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

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

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
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Copyright © 2023 Steve Syfuhs
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