Misunderstanding? Intel's patch is what fixed this for x86-64 P-256. Was broken before. Still broken for other curves & platforms.
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Replying to @BRIAN_____ @bascule
Was Intel the one who discovered P-256 arithmetic wasn't correctly reducing mod p? It was Intel's code originally.
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Replying to @stevecheckoway @bascule
Depending on what you're talking about, that was probably me who found that.
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Replying to @BRIAN_____ @bascule
I thought that was you. Was there some other issue with P-256 recently?
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Replying to @stevecheckoway @bascule
Besides the reduction issue, I also reported issues with handling the point at infinity.
9:16 AM - 5 Jan 2017
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