VERFAHREN UND VORRICHTUNG ZUM VERSCHLÜSSELN UND ENTSCHLÜSSELN VON MIKROPROZESSORSERIENNUMMERN

摘要

A method and apparatus for encrypting and decrypting a microprocessor serial number. First and second encryption keys and a serial number are provided in microprocessor machine specific registers. The serial number is encrypted using the first key. The encrypted serial number is encrypted using the second key. The first encryption key may be encrypted along with the serial number using the second key. The double encrypted serial number is then stored in memory provided for that purpose.