Why am I being asked for a Passkey? How do I turn off passkeys?

You've been using a passkey to login to Windows since you enabled Windows Hello to perform Face, Fingerprint or PIN login methods, since they' re an integral part of that system. They simply weren't as visible in the past, since the Passkey Management and using them for 3rd-party apps or websites weren't yet supported.

As usual, the problem is there are many documents available covering these and some confusing differences between the Azure Business-based systems using something called Entra for authentication and the consumer version of these related to your Microsoft Personal account. I'll include documents from both here in case you are more technically interested but tell you which I'm providing.

The first is an overview for consumer accounts and should help you understand how crucial they are to Microsoft's future authentication systems intended to remove the need for passwords, so trying to escae them is utterly pointless.

New passkey support for Microsoft consumer accounts | Microsoft Security Blog

This next one has more technical detail and in the first sections describes in general how they work, while a later section is specific to the Microsoft implementation and shows how these functions relate to Windows Hello, the Edge browser and other similar portions of Windows. I wouldn't typically provide this to the average consumer, but it really makes their operation on Windows clear for those wanting to understand them more deeply.

WebAuthn APIs - Windows Security | Microsoft Learn

I think I'll stop there for the moment to make sure you want more iformation, since upon quick review, these two documents cover the basics, while there are many others that provide the How-to explanations for individual portions of passkey operation.

Rob

< EDIT > BTW, here's a FAQ document with some common questions about passkeys, the last of which is titled; How can I provide feedback about my experience with passkeys?

Passkeys frequently asked questions (FAQ) - Microsoft Support

If you click the question to view the answer, you'll find a link to the Windows Feedback where you can submit your comments directly to Microsoft. Anything you post in this forum will only be seen by those who browse here, while virtually no Microsoft employees ever do and so your posts here are only really seen by us volunteer or a few contract helpers.

I appreciate your response. If a password and the multi-authentication code is not sufficient, what does a 'passkey' do?

Why doesn't Microsoft provide some easy-to-understand explanation of what a 'passkey' is and why it is different for every site?

I provided that information in a previous reply (page 11) but here are those and some more links by Microsoft with explanations.

• What is a passkey?
• What are passkeys? How do they work and how do they relate to FIDO2
• Passkeys Overview & Management
• Introduction to passkeys
• Support for passkeys in Windows
• Passkeys FAQs
• WebAuthn APIs for passwordless authentication on Windows

Passkeys Authentication Across Platforms - How Passkeys Registration and Authentication Work Across Devices and Platforms

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To combat such risks, phishing-resistant Passwordless authentication methods, including enhanced support for Microsoft Authenticator, have become critical.

Just for the record...Microsoft has long been a proponent of passwordless authentication for years so this is nothing new. Other industries have been moving in that direction too. .

• Microsoft introduces passkeys for consumer account

In a nutshell...Passkeys are stored as secrets locally on a device and use a device's unlock mechanism such as Windows Hello biometrics (fingerprint or facial recognition) or PIN sign-In options to authenticate them before signing in. Passkeys can be used without the need for other sign-in challenges, making the authentication process faster and more convenient. A passkey is invisible, virtual and employ public-key cryptography (keypair concept: a private key and a public key). The passkey is purposely hidden from access inside the TPM (Trusted Platform Module).
 
A TPM chip is an embedded crypto-processor in laptops and is designed to provide hardware-based, security-related functions (carry out cryptographic operations. The TPM is isolated from the main processor and functions as a vault (a lockbox for keys) so in the event of malware attack or breach, sensitive user data remains secure.