It is not well known, but you can perform a collaborative ECDH with the key shares. I have an example in the @cmdcode/frost library.
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Very interesting. Can you do an example with NIP-44? I'd love to get NIP-17 DMs working with FROSTR if possible.
That's interesting. How would you combine that with a symmetric cipher?
Ah hah. Earlier I tried 0xchat when logged in via nsec.app bunker, no go for redeem, but revert to nsec and all good—so what you said tracks. Wonder if a collaborative ECDH via Frost would do it?
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