The X-Wall Secure Key contains the DES/TDES “Secret Key” that is used by X-Wall to encrypt or decrypt data. Without the key, the protected disk drive cannot be booted and there is no access into the PC. Together the X-Wall Secure Key and X-Wall comprise an effective user authentication for access control and encryption for data protection. The X-Wall Secure Key serves as user authentication for access control while X-Wall encrypts and decrypts.