Let’s say you have access to a remote machine and use it to copy backups occasionally, eg with rsync. Your local machine has credentials stored that allow write access on the remote machine, however if the local account was compromised that could also allow access to the remote machine and the data stored there.
How can you grant access to an account to write remotely, but also protect the data from this account? One possibility could be to change the permissions on the data after it is copied to prevent deletion/interference, although I’m just making this up. Is there a standard practise for this?
Restic has quite a good solution for this: https://restic.readthedocs.io/en/stable/060_forget.html#security-considerations-in-append-only-mode
Funny thing is that blockchains are actually good for this type of thing. Too bad crypto bros got a hold of it.