Throwing a curved ball into this. Why did they abandon digital bearer certificates? (There’s actually an implementation of this I believe by the guy who invented the idea, using Blockchain I think.)
It was a really great tech - discussed here before - but had one weakness: the need to trust a centralised mint to validate transactions.
I understood that the network could perform that function and solve that problem, and for a long time that was the approach MaidSafe were working on. They abandoned it in favour of the DAG ledger but I don’t recall why, or perhaps no explanation was given.
Maybe it was too anonymous and that killed it rather than any technical problem because the change was around the time the regulatory environment started to get hostile.
When this was the plan we were promised all sorts of brilliant features and characteristics. Offline transactions, no DAG/ledger, privacy max with hidden inputs and outputs. All the network had to do was tell a client whether a transaction was valid or not. Almost all the work was offline.
Maybe we can clarify why that was dropped and look at implementing it. Do you remember @mav? Seems something you’d have taken an interest in. There’s probably working code for parts, maybe in private repos, but I expect most of it is fairly straightforward for someone with the skills. I don’t remember if it was tested outside.