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Security assurances of bitlocker auto-unlock feature

Agna EA 1 Reputation point
2022-08-10T12:36:36.613+00:00

We are working based on a project requirement to use Bitlocker Auto-Unlock feature in a FIPS-GPO-enabled environment. Unlocking the bitlocked devices with passwords, in a FIPS-enabled environment will make them write-protected. Using a recovery key or a recovery password does not opt for our requirement.
But we can make use of this Auto-unlock feature to overcome the present situation.
So, before enabling the auto-unlock, want to know the details regarding the following queries.

1) How do windows securely manages this auto-unlock feature and how does it work internally?
2) Also, What are the security assurances of using auto-unlock feature for portable devices?

Any help would be appreciated.
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Developer technologies | Windows Forms
Windows for business | Windows Client for IT Pros | Devices and deployment | Configure application groups
Windows for business | Windows Client for IT Pros | User experience | Other
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  1. Limitless Technology 39,926 Reputation points
    2022-08-11T15:46:24.157+00:00

    Hi there,

    You can configure BitLocker to automatically unlock volumes that do not host an operating system. After a user unlocks the operating system volume, BitLocker uses encrypted information stored in the registry and volume metadata to unlock any data volumes that use automatic unlocking.

    BitLocker can use a TPM to verify the integrity of early boot components and boot configuration data. This helps ensure that BitLocker makes the encrypted drive accessible only if those components have not been tampered with and the encrypted drive is located in the original computer.

    For an overview of BitLocker, see BitLocker Drive Encryption Overview on TechNet

    https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc732774(v=ws.11)?redirectedfrom=MSDN

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