Graphic illustrating the “addition” operation on elliptic-curve points as used in asymmetric cryptography. For an explanation, consult the linked blog piece.

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   Tim Bray (timbray@cosocial.ca)'s status on Tuesday, 05-Nov-2024 05:13:47 JST Tim Bray

   I recommend this for anyone who's interested in modern cryptography, not frightened of a little math, but not actually a professional: https://www.amazon.science/blog/better-performing-25519-elliptic-curve-cryptography

   There are a lot of reasons to like the “25519” key technology, and while this talks about interesting work at AWS to make it safer and faster, it also has maybe the best basic intro to elliptic-curve math that I’ve read anywhere.