I suggest you study these two links - restic is open source - so all is documented (better or worse but nothing is secret)
and
https://restic.readthedocs.io/en/latest/100_references.html#terminology
I suggest you study these two links - restic is open source - so all is documented (better or worse but nothing is secret)
and
https://restic.readthedocs.io/en/latest/100_references.html#terminology