Executing a monitor on a platform, the monitor capable of providing exclusive, secure access to an audio I/O device of the platform, executing a first partition on the platform, providing an audio device model in the first partition by directly mapping the audio I/O device from the monitor to the first...http://www.google.fr/patents/US7971057?utm_source=gb-gplus-shareBrevet US7971057 - Exclusive access for secure audio program