🤔🧐😳
OK, you had me going there for a moment...
April fools, eh?
Asymmetric encryption is foundational to both bitcoin AND nostr!
Today I learned that if you do many signatures with the same private key then it's very possible for an attacker to uncover it using these signatures and your public key: https://cdn.satellite.earth/f2daa984ce219112102ec783574df3ea612d51031e653479c903e95cfb3c70d7.mp3
Discussion
Bitcoin rotates keys.
So, how real/serious is the re-use risk in the context of nostr?
Should nostr be improved to use something like bitcoin's BIP-32 protocol to give each user deterministic keypair chains?🤔
That's one of the first improvements I've wanted to see on nostr, but I have no idea if the re-use risk is going to matter. Keychains would also help with the risk of entering keys into all the different apps and devices people use