Nov 13, 2019 The BitLocker setup process enforces the creation of a recovery key at the time of activation. If you are unable to locate a required BitLocker recovery key and are unable to revert and configuration change that might have cause it to be required, you’ll need to reset your device using one of the Windows 10 recovery options. Resetting your.
Discus and support Recover BitLocker key from Key ID in Windows 10 Installation and Upgrade to solve the problem; Hi,I have a device listed on my Microsoft account and it confirms that this device is protected with a BitLocker key, but it doesn't retrieve me the.. Discussion in 'Windows 10 Installation and Upgrade' started by VictorWirz, Mar 8, 2019.
Applies to
You can unlock removable data drives by using a password, a smart card, or you can configure a SID protector to unlock a drive by using your domain credentials. After you've started encryption, the drive can also be automatically unlocked on a specific computer for a specific user account. System administrators can configure which options are available for users, as well as password complexity and minimum length requirements. To unlock by using a SID protector, use Manage-bde:
Manage-bde -protectors -add e: -sid domainusername
For tables that list and describe elements such as a recovery password, recovery key, and PIN, see BitLocker key protectors and BitLocker authentication methods.
The recovery password and recovery key for an operating system drive or a fixed data drive can be saved to a folder, saved to one or more USB devices, saved to your Microsoft Account, or printed.
Sins of the solar empire. For removable data drives, the recovery password and recovery key can be saved to a folder, saved to your Microsoft Account, or printed. By default, you cannot store a recovery key for a removable drive on a removable drive.
A domain administrator can additionally configure Group Policy to automatically generate recovery passwords and store them in Active Directory Domain Services (AD DS) for any BitLocker-protected drive.
You can use the Manage-bde.exe command-line tool to replace your TPM-only authentication mode with a multifactor authentication mode. For example, if BitLocker is enabled with TPM authentication only and you want to add PIN authentication, use the following commands from an elevated command prompt, replacing 4-20 digit numeric PIN with the numeric PIN you want to use:
manage-bde –protectors –delete %systemdrive% -type tpm
manage-bde –protectors –add %systemdrive% -tpmandpin 4-20 digit numeric PIN
New hardware that meets Windows Hardware Compatibility Program requirements make a PIN less critical as a mitigation, and having a TPM-only protector is likely sufficient when combined with policies like device lockout. For example, Surface Pro and Surface Book do not have external DMA ports to attack.For older hardware, where a PIN may be needed, it’s recommended to enable enhanced PINs that allow non-numeric characters such as letters and punctuation marks, and to set the PIN length based on your risk tolerance and the hardware anti-hammering capabilities available to the TPMs in your computers.
BitLocker is designed to make the encrypted drive unrecoverable without the required authentication. When in recovery mode, the user needs the recovery password or recovery key to unlock the encrypted drive.
Important
Store the recovery information in AD DS, along with your Microsoft Account, or another safe location.
While this is technically possible, it is not a best practice to use one USB flash drive to store both keys. If the USB flash drive that contains your startup key is lost or stolen, you also lose access to your recovery key. In addition, inserting this key would cause your computer to automatically boot from the recovery key even if TPM-measured files have changed, which circumvents the TPM's system integrity check.
Yes, you can save a computer's startup key on multiple USB flash drives. Right-clicking a BitLocker-protected drive and selecting Manage BitLocker will provide you the options to duplicate the recovery keys as needed.
Yes, you can save BitLocker startup keys for different computers on the same USB flash drive.
You can generate different startup keys for the same computer through scripting. However, for computers that have a TPM, creating different startup keys prevents BitLocker from using the TPM's system integrity check.
You cannot generate multiple PIN combinations.
Raw data is encrypted with the full volume encryption key, which is then encrypted with the volume master key. The volume master key is in turn encrypted by one of several possible methods depending on your authentication (that is, key protectors or TPM) and recovery scenarios.
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The full volume encryption key is encrypted by the volume master key and stored in the encrypted drive. The volume master key is encrypted by the appropriate key protector and stored in the encrypted drive. If BitLocker has been suspended, the clear key that is used to encrypt the volume master key is also stored in the encrypted drive, along with the encrypted volume master key.
This storage process ensures that the volume master key is never stored unencrypted and is protected unless you disable BitLocker. The keys are also saved to two additional locations on the drive for redundancy. The keys can be read and processed by the boot manager.
The F1 through F10 keys are universally mapped scan codes available in the pre-boot environment on all computers and in all languages. The numeric keys 0 through 9 are not usable in the pre-boot environment on all keyboards.
When using an enhanced PIN, users should run the optional system check during the BitLocker setup process to ensure that the PIN can be entered correctly in the pre-boot environment.
It is possible that a personal identification number (PIN) can be discovered by an attacker performing a brute force attack. A brute force attack occurs when an attacker uses an automated tool to try different PIN combinations until the correct one is discovered. For BitLocker-protected computers, this type of attack, also known as a dictionary attack, requires that the attacker have physical access to the computer.
The TPM has the built-in ability to detect and react to these types of attacks. Because different manufacturers' TPMs may support different PIN and attack mitigations, contact your TPM's manufacturer to determine how your computer's TPM mitigates PIN brute force attacks.After you have determined your TPM's manufacturer, contact the manufacturer to gather the TPM's vendor-specific information. Most manufacturers use the PIN authentication failure count to exponentially increase lockout time to the PIN interface. However, each manufacturer has different policies regarding when and how the failure counter is decreased or reset.
You can determine your TPM manufacturer in Windows Defender Security Center > Device Security > Security processor details.
The following questions can assist you when asking a TPM manufacturer about the design of a dictionary attack mitigation mechanism:
Yes and No. You can configure the minimum personal identification number (PIN) length by using the Configure minimum PIN length for startup Group Policy setting and allow the use of alphanumeric PINs by enabling the Allow enhanced PINs for startup Group Policy setting. However, you cannot require PIN complexity by Group Policy.
For more info, see BitLocker Group Policy settings.