Projection of trustworthiness from a trusted environment to an untrusted environment
CA 2473487 C · Owner: Kaplan, Keith · Inventors: Kurien, Varugis; Kaplan, Keith; England, Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a single machine that has entities running in an unfrosted environment and entities running in a trusted environment the trustworthiness of the entities in the trusted environment is projected to the entities in the unfrosted environment. This is applicable for example, to Microsoft®'s Next Generation Secure Computing Base (NGSCB) where a regular operating system (e.g. the Windows® operating system) hosts a secure operating system (e.g. the nexus).
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 12, 2004 and granted September 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.