On Sun, 29 May 2022 13:07, Johan Wevers said: > Why do they do that? BTW, when I search for brainpool I only find > definitions and RFC's, I seem unable to find why they are needed (or why > they would be peferred) over other curves.
That is mostly a political issue: In Europe the use of NIST curves is not allowed due to security concerns. In the US the Brainpool curves are not yet part of the FIPS standard and thus may not be used by the government. However, Curve25519 is also not allowed by FIPS but still included in RedHat's Libgcrypt build. I am not aware of any patent issues with standard Weierstrass curves like NIST-P and Brainpool-P curves. All relevant patents expired a few years ago. Salam-Shalom, Werner -- The pioneers of a warless world are the youth that refuse military service. - A. Einstein
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