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Systems and methods using cryptography to protect secure computing environments    
United States Patent6157721   
Link to this pagehttp://www.wikipatents.com/6157721.html
Inventor(s)Shear; Victor H. (Bethesda, MD); Sibert; W. Olin (Lexington, MA); Van Wie; David M. (Sunnyvale, CA)
AbstractSecure computation environments are protected from bogus or rogue load modules, executables and other data elements through use of digital signatures, seals and certificates issued by a verifying authority. A verifying authority--which may be a trusted independent third party--tests the load modules or other executables to verify that their corresponding specifications are accurate and complete, and then digitally signs the load module or other executable based on tamper resistance work factor classification. Secure computation environments with different tamper resistance work factors use different verification digital signature authentication techniques (e.g., different signature algorithms and/or signature verification keys)--allowing one tamper resistance work factor environment to protect itself against load modules from another, different tamper resistance work factor environment. Several dissimilar digital signature algorithms may be used to reduce vulnerability from algorithm compromise, and subsets of multiple digital signatures may be used to reduce the scope of any specific compromise.
   














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Drawing from US Patent 6157721
Systems and methods using cryptography to protect secure computing environments - US Patent 6157721 Drawing
Systems and methods using cryptography to protect secure computing environments
Inventor     Shear; Victor H. (Bethesda, MD); Sibert; W. Olin (Lexington, MA); Van Wie; David M. (Sunnyvale, CA)
Owner/Assignee     InterTrust Technologies Corp. (Santa Clara, CA)
Patent assignment
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Publication Date     December 5, 2000
Application Number     08/689,754
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     August 12, 1996
US Classification    
Int'l Classification    
Examiner     Buczinski; Stephen C.
Assistant Examiner    
Attorney/Law Firm     Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
Address
Parent Case     CROSS REFERENCE TO RELATED APPLICATION This application is related to commonly assigned copending application Ser. No. 08/388,107 of Ginter et al., filed Feb. 13, 1995, entitled "SYSTEMS AND METHODS FOR SECURE TRANSACTION MANAGEMENT AND ELECTRONIC RIGHTS PROTECTION". We incorporate by reference, into this application, the entire disclosure of this prior-filed Ginter et al. patent application just as if its entire written specification and drawings were expressly set forth in this application.
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Patent Tags     methods cryptography protect secure computing environments
   
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