Replying to Avatar Max

Ah, so the main key does a gift wrap to send the backup to a new pubkey, thats why the relationship between these two keys is private?
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Max 2y ago

And thus even if the main key leaks, the backup keys are not known.

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Vitor Pamplona 2y ago

And if you need to access the backups just giftwrap them with yet another key so that they backup key never leaves the backup client.

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Max 2y ago

Ok, thanks.

So, is it correct that the sender has forward secrecy, the receiver does not?

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Vitor Pamplona 2y ago

I think so. Maybe the better way is that we haven't been able to figure out a way to do it yet.