A method and system for providing copy-protection on a storage medium by randomizing locations upon write access, and a player and a storage medium for use in such a system
CA 2332008 A1 · Owner: Koninklijke Philips Electronics N.V. · Inventors: Staring, Antonius A. M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method for providing copy-protection services on storage medium the , locations where the data, preferably arranged in blocks are stored, are , chosen by a (preferably built-in) controller on a random basis. Using an encryption key which depends critically on the position of the data the storage medium, decrypting copied data is made virtually impossible.
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 March 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2022.
- 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.