The recovery key is unique per encrypted disk. Should the user alter their computer hardware or the TPM module malfunctions, Windows will prompt for an all-digits recovery key. Windows developers designed an alternative way of gaining access to encrypted data in case of emergencies. If the computer is equipped with a TPM2.0 module or its emulation (Intel PTT or AMD fTPM), a password attack would be meaningless: the protector is stored in the TPM module, and one cannot extract it from there. However, BitLocker drive encryption, if enabled, effectively blocks access to encrypted data. Imaging physical disks installed in the computer is a mandatory first step in forensic analysis. In this article we’ll discuss the available options for extracting BitLocker keys from authenticated sessions during live system analysis. Live system analysis is the easiest and often the only way to access encrypted data stored on BitLocker-protected disks.
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