Should use OCB or EAX for AEAD
As noted by Neal in https://gitlab.com/larswirzenius/obnam/-/merge_requests/104#note_523788665 Obnam should be using OCB or EAX for AEAD.
As noted by Neal in https://gitlab.com/larswirzenius/obnam/-/merge_requests/104#note_523788665 Obnam should be using OCB or EAX for AEAD.