As far as I understand (if there is any error, please correct it), when configuring an onion v3 service, three files are generated: "hostname", "hs_ed25519_secret_key" and "hs_ed25519_public_key". The last two files are a pair of master keys, private and public ed25519 ("master keypair (sk, pk)"). In principle, according to the v3 protocol, these keys can be stored offline (in a pendrive, for example), because they are used to generate other types of keys ("blind"). But:

-Can the master key pair currently be saved offline without damaging the onion service?

-How are "blind" keys generated? Are they generated by the onion v3 service operator, or are they generated automatically?

Thank you very much.

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