Method and apparatus for exponentiation in an rsa cryptosystem
CA 2470422 C · Owner: Antipa, Adrian · Inventors: Antipa, Adrian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of computing an exponent of a message m in an RSA cryptosystem having a private key d a public key a and system parameters p q where p and q are primes and ed = 1 mod (p-1) (q-1). The method comprises the steps of obtaining a value r and exponentiating the value r to the power e to obtain an exponent r e mod p combining said exponent r e with the message m to obtain a combined value r e m and mod p; selecting a value s and obtaining a difference (d-s) exponentiating the combined value with said difference to obtain an intermediate exponent (r e m) d-s multiplying the intermediate exponent by a value m s to obtain a resultant value equivalent to r l-es m d and multiplying the …
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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 June 9, 2004 and granted January 15, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2026.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.