A method and apparatus for providing secure and private keyboard communications in a computer system. A request for private keyboard communications causes the computer's processor to enter into system management mode by generating an system management interrupt. A secure system management...http://www.google.es/patents/US5748888?utm_source=gb-gplus-sharePatente US5748888 - Method and apparatus for providing secure and private keyboard communications in computer systems
Method and apparatus for providing secure and private keyboard ...