What triggers BitLocker?

Microsoft highlights several scenarios that may necessitate BitLocker recovery. One such scenario involves an attacker modifying a computer, particularly those equipped with a Trusted Platform Module (TPM). The TPM plays a crucial role in ensuring the integrity of boot components during the startup process.

When a BitLocker-protected drive is connected to a new computer, the TPM or other hardware-based security features may not recognize the new environment as trusted. This triggers the recovery process, requiring the user to provide a recovery key or other authentication methods to access the encrypted data.

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When an attacker gains unauthorized access to a computer and makes changes to its system files or boot components, it can compromise the security of the device. In such cases, BitLocker, a security feature designed to protect data on Windows operating systems, may enter recovery mode to prevent unauthorized access to encrypted drives.

For computers with TPM, the recovery process is triggered when the TPM detects inconsistencies in the boot components during startup. This mechanism ensures that only trusted and unmodified components are used to boot the system, thereby maintaining the security of the encrypted drives.