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Expired Canadian patentCanada

System and method for generating encryption seed values

CA 2491702 C · Owner: Eaton, Jason · Inventors: Eaton, Jason; Shankar, Vishnu

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method for generating a seed value for use in symmetric encryption includes creating and storing a first data set and generating a hashed value based on the first data set. A replacement position in the first data set is selected and at least a portion of the hashed value is written into the first data set at the replacement position. A seed portion of the first data set is selected as the seed value. By varying a number of iterations a balance can be struck , between performance (fewer iterations) and security (more iterations).

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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 July 15, 2003 and granted February 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2023.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 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.
FiledJuly 15, 2003
GrantedFebruary 12, 2013
Term endedJuly 15, 2023
Patent numberCA 2491702 C
Classification (IPC)H04L9/18 +1 more

Timeline

Timeline From CIPO dates

2004200620082010201220142016201820202022Application filedJuly 15, 2003Patent grantedFeb 12, 2013Term endedJuly 15, 2023

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.