Enrolling/sub-enrolling a digital rights management(drm) server into a drm architecture
CA 2457938 C · Owner: Krishnaswamy, Vinay · Inventors: Kostal, Gregory; Bourne, Steve; Krishnaswamy, Vinay
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Digital Rights Management (DRM) system has a plurality of DRM servers performing DRM functionality and an entering DRM-E server is enrolled into the system by an enrolling DRM-R server such that the entering DRM-E server is to be trusted within the system. The DRM-E server sends an enrollment request to the DRM-R server including a proffering identification and a public key (PU-E). The DRM-R server validates the proffering identification and, if the request is to be honored, generates a digital enrollment certificate with (PU- E) for the DRM-E server to enroll such DRM-E server into the DRM system. The now- enrolled DRM-E server with the generated enrollment certificate is able to employ …
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 February 16, 2004 and granted October 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 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.