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On devices with Windows' BitLocker disk encryption enabled, which corporations often use to increase security, fixing the problem was exacerbated because the 48-digit numeric Bitlocker recovery keys (unique to each system) required manual input, with additional challenges supplying the recovery keys to end users working remotely. Additionally ...
BitLocker originated as a part of Microsoft's Next-Generation Secure Computing Base architecture in 2004 as a feature tentatively codenamed "Cornerstone" [4] [5] and was designed to protect information on devices, particularly if a device was lost or stolen.
Key escrow (also known as a "fair" cryptosystem) [1] is an arrangement in which the keys needed to decrypt encrypted data are held in escrow so that, under certain circumstances, an authorized third party may gain access to those keys.
BitLocker is the combination of these features; "Cornerstone" was the codename of BitLocker, [85] [86] and BitLocker validates pre-boot firmware and operating system components before boot, which protects SYSKEY from unauthorized access; an unsuccessful validation prohibits access to a protected system.
A common purpose of cold boot attacks is to circumvent software-based disk encryption. Cold boot attacks when used in conjunction with key finding attacks have been demonstrated to be an effective means of circumventing full disk encryption schemes of various vendors and operating systems, even where a Trusted Platform Module (TPM) secure cryptoprocessor is used.
Some people using the BitLocker drive encryption software also risk losing their local disk data if the recovery key for their data was stored in OneDrive as per Microsoft's recommendations. It is reported that at least 100 users in Germany have been affected by this up to 2022.
This requires local administrator access and if the device was encrypted by BitLocker, also required a recovery key. [74] Microsoft reported that some customers were able to remediate the issue solely by rebooting impacted devices up to 15 times. [75]
Multiple keys: Whether an encrypted volume can have more than one active key. Passphrase strengthening: Whether key strengthening is used with plain text passwords to frustrate dictionary attacks, usually using PBKDF2 or Argon2. Hardware acceleration: Whether dedicated cryptographic accelerator expansion cards can be taken advantage of.
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