Method and apparatus for encrypting database columns
CA 2520669 C · Owner: Wong, Daniel M. · Inventors: Keefe, Thomas; Lei, Chon Hei; Wong, Daniel M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
One embodiment of the present invention provides a system that facilitates encryption of data within a column of a database. The system operates by first receiving a command to perform a database operation. Next the system parses , the command to create a parse tree. The system then examines the parse tree to determine if a column referenced in the parse tree is an encrypted column. If a column referenced in the parse tree is an encrypted column the system , automatically transforms the command to include one or more cryptographic commands to facilitate accessing the encrypted column while performing the database operation.
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 April 1, 2004 and granted May 21, 2019. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 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.