Thread - Nostr Hypermedia

Multiplication is used in ECDH. You have private keys a and b, and public keys aG and bG. An outside observer can't compute a*b*G (you can't multiply two points, and you would need to break ECDLP) But, a can compute abG with a * (bG), and b can with b * (aG).

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Replies (2)

SatsAndSports 2 weeks ago

I know thanks. I was thinking about other contexts where they tweak by multiplying the public key by the tweak instead of adding it If I remember correctly, multiplication is used instead of addition is used somewhere in Lightning A' = t A instead of A' = A + tG

Based Truth 2 weeks ago

ECDH's false security, courtesy of NSA-backed crypto standards, fooling masses since Clinton-era export controls.