Quantum key distribution method and communication apparatus
CA 2499357 A1 · Owner: Matsumoto, Wataru · Inventors: Matsumoto, Wataru; Watanabe, Youdai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is possible to create a shared key whose safety is surely guaranteed while correcting a data error in the transmission path by using an error correction code having an extremely high characteristic. According to a quantum key distribution method, firstly, a communication device of the reception side corrects the data error of the reception data by using a parity inspection matrix for an ~Irregular-LDPC code~ which is determinate and has stable characteristic. The communication device of the reception side and the communication device of the transmission side discard a part of shared information according to the error correction information disclosed.
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 September 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 12, 2025.
- 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.