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What encryption type does Windows Hello use for fingerprint information on Windows 10 latest build?

Posted on 1/15/2017
UQ ID:469
Technology
Information Security
Original

I've contacted Microsoft support and they said they don't support encryption, which is why I'm posting here.

Basically, what I'm wondering is, if a modern laptop has TPM 2.0 enabled and hardware encryption enabled and then they want to use Windows Hello for their fingerprint, what encryption type is used for that biometric data? XTS-AES 128? 256? Something else? How do we look into or verify this? For BitLocker, there is a dedicated configuration page which allows you to choose what encryption type you want. Nothing for Windows Hello, it seems.

I haven't found this information anywhere, it seems that no one really knows what's going on under the hood.

If it's using SHA-1, that's bad. It should be using SHA-2.

Keywords & Tags
encryption
windows
fingerprint
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K2-Think

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MBZUAI-IFM
Qwen2.5-32B
Sep 18, 2025, 01:50 PM

Windows Hello, Microsoft's biometric authentication system, handles fingerprint information through a combination of secure processing and encryption, leveraging hardware components like the TPM (Trusted Platform Module) 2.0 when available. Here's a breakdown of the encryption mechanisms and verification details:

Encryption Type for Fingerprint Data:

  • Biometric Template Storage: Fingerpr...
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GPT-5

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OpenAI
Sep 2, 2025, 06:56 AM

Short answer

  • There is no user-selectable “encryption type” for Windows Hello biometrics, and it is not comparable to BitLocker’s XTS-AES options.
  • Windows Hello does not store a fingerprint image or a hash (so SHA-1 vs SHA-2 is not applicable). It stores a biometric template that must be compared with some tolerance, which cannot be done with a one‑way hash.
  • The template is stored only on the...
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o3 Pro

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OpenAI
Aug 1, 2025, 12:00 AM

Windows Hello does not work the same way as BitLocker, where you can pick an “encryption type”.
With Hello you are not encrypting a file that you later decrypt; instead you are

  1. Creating a public / private key pair that is bound to (and can only be used by) the device’s TPM, and
  2. Unlocking the private key with a “gesture” (PIN, fingerprint, face, iris …).

The fingerprint is only the gest...

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o3

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OpenAI
Aug 1, 2025, 12:00 AM

The short version
• Windows Hello never stores a picture of your finger.
• The “finger-print” that stays on the machine is a proprietary template that can only be used by the Windows Biometric Framework (WBF) and by the driver that created it.
• That template is encrypted on the disk with keys that are in (or are protected by) the TPM.
• The encryption that is applied is AES (128- or 2...

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o4 mini

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OpenAI
Aug 1, 2025, 12:00 AM

Windows Hello doesn’t use BitLocker’s XTS-AES routines at all and you won’t find a “bitlocker-style” switch to pick XTS-AES-128 vs. 256. Biometric templates (fingerprint, face, iris) are handled by the Windows Biometric Framework (WBF) and ultimately protected by the Data Protection API (DPAPI/DPAPI-NG) with a key that is itself sealed into your TPM. On a recent Windows 10 build the stack looks ...

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Claude 3.7 Sonnet

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Anthropic
Aug 1, 2025, 12:00 AM

Windows Hello Fingerprint Encryption Details

Windows Hello's biometric data storage uses a multi-layered security approach that goes beyond simple encryption. Here's what I can tell you about how fingerprint data is protected in Windows 10:

Core Security Architecture

Windows Hello stores biometric data locally on your device (never in the cloud) and implements several layers of protection:...

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Gemini 2.5 Pro

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Google
Aug 1, 2025, 12:00 AM

Here is a detailed answer that clarifies the security model of Windows Hello, addresses the user's specific questions, and corrects common misconceptions.


Summary: The Core Concept

The fundamental misunderstanding in the question is the idea that your fingerprint image is encrypted and stored. This is not how Windows Hello or any modern biometric system works.

**Windows Hello does no...

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Claude Opus 4

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Anthropic
Aug 1, 2025, 12:00 AM

Windows Hello stores biometric data using a combination of security measures, though Microsoft doesn't publicly document all the specific cryptographic details. Here's what we know:

Storage and Protection Mechanism

Windows Hello biometric data (including fingerprints) is stored as follows:

  1. TPM-Protected Storage: When TPM 2.0 is available, Windows Hello stores biometric templates in a ...
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DeepSeek R1

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DeepSeek
deepseek-ai/DeepSeek-R1
Aug 1, 2025, 12:00 AM
<think> We are given a question about the encryption used by Windows Hello for fingerprint data on Windows 10 with TPM 2.0 and hardware encryption enabled.

Key points from the question:

  • The user has contacted Microsoft support and didn't get a clear answer.
  • They are concerned about the encryption algorithm and strength (e.g., XTS-AES 128/256, SHA-1 vs SHA-2).
  • They note that BitLocker has a ...
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