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Trusted operating system with emulation and process isolation

  • US 7,549,165 B2
  • Filed: 07/17/2006
  • Issued: 06/16/2009
  • Est. Priority Date: 06/17/2002
  • Status: Expired due to Term
First Claim
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1. Computer program product stored on tangible computer readable media, the computer program product comprising:

  • a trusted operating system executable by a processor on a computing system, the trusted operating system emulating another operating system by allowing an application program written for the other operating system to execute on the trusted operating system without requiring changes to the application program, the trusted operating system further comprising code for enforcing a set of security rules designed to protect a first process from unauthorized access by a second process, the second process having a security level different than that of the first process.

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