i think this could be useful on nostr too, especially in reddit like client like #substr where you may not want to disclose all your activity across different subs.

i think this would be possible on nostr also.

simple derived nsecs would work for the privacy:
uniqueprivkey = sha256(privkey + substr_name)

but then the problem is that the profiles are indeed distinct and not the same.

can you come up with a cryptographic solution that allows reuse of same identity (pubkey) while in some way hiding overal profile activity? might be a bit challenging, but is it impossible or not?

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