What does BitLocker typically use to store the encryption key on a computer?

BitLocker typically uses the Trusted Platform Module (TPM) to store the encryption key on a computer. The TPM is a hardware-based security feature integrated into many modern computers that provides a secure environment for storing sensitive information, such as encryption keys. By using the TPM, BitLocker enhances the security of the encryption key, ensuring that it is protected from tampering or unauthorized access.

When the system is powered on, the TPM validates the integrity of the system and provides the decryption key to the BitLocker software, allowing the operating system to boot and access its encrypted files. This process helps to ensure that even if someone tries to bypass security measures, the encryption key remains safe and secure within the TPM.

Other methods, such as storing the encryption key on a hard drive, an external USB drive, or user account credentials, do not offer the same level of security as a TPM. For example, if the key were stored on the hard drive, a malicious user with access to the drive could potentially retrieve it. Similarly, while external USB drives can provide portability, they introduce risks if lost or stolen. User account credentials are useful for authentication but may not provide the same level of protection specifically for the encryption key itself.