Secure receipt-free electronic voting
CA 2176990 C · Owner: Kilian, Joseph J. · Inventors: Sako, Kazue; Kilian, Joseph J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A number-theoretic based algorithm provides for secure receipt-free voting. A vote generating center generates a choice of votes for each voter or vote chooser. The, votes are encrypted, shuffled and conveyed to a vote chooser along with information, regarding how the votes were shuffled without being intercepted enroute. The information is preferably sent along secure untappable channels. The method can, incorporate validification of generation and shuffling of the votes using chameleon, commitment and interactive proofs. The invention can be realized by currentgeneration, personal computers with untappable channels and access to an electronic bulletin board.
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 May 21, 1996 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2018.
- 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.