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Credentials -> DecryptedIdentityKeys
Derive a symmetric key and a signing keypair from a password and salt using scrypt, using the signing key to authenticate and fetch, and the symmetric key to decrypt, a remote identity bundle.
Problem it solves
Users need to securely retrieve their private keys from any machine without trusting the storage server or exposing keys to brute-force attacks.
Consumes
Emits
Establishes
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.