Let's have a go at analysing this MintChip idea a bit further...
What I don't understand is: why couldn't they mimic the Bitcoin system and put themselves in the position of a monopoly miner? That way they would avoid that whole problem with hardware security. They could run decentralised copies of a ledger (blockchain) on server farms. They could make it multi-tiered so, unlike Bitcoin, they'd be less likely to run into networking bottlenecks. The user experience could (in theory) be quite similar to Bitcoin -- fast, anonymous transactions, low costs... Users would have a range of online tools available... The proof-of-work would probably be far weaker, but still practically unbreakable...
Come to think of it, that is probably not too different from the way regular currencies operate. However, a few questions remain unanswered:
- Why would a central authority bother? What's in it for them?
- Who regulates the money supply?
- Could transactions really be anonymous?
In attempting to answer these questions, it becomes obvious that the RCM simply couldn't mimic Bitcoin, even if they were crazy enough to try. The need for control over society is too strong in their DNA. Transactions would have to be profitable enough to pay for all the infrastructure. They would "self-regulate", or, at best, convince a government that inflation must be never-ending. And there would likely be strict restrictions on the anonymity of such a system.[/list]
I think you got it quite wrong: there's no central ledger here. As I understand it, the mintchip devices are trusted to keep the balance themselves, on the device. Therefore, security relies on the "fact" that you can't get read a mintchips key off of the device. Why can you trust a given mintchip? because there's some PKI (Public Key Infrastructure) in place verifying the public key of a supposed mintchip is trusted by the mint and therefore that "mintchip wallet" was issued by the royal mint.
Also: there is not "money supply" because mintchip is not a currency of its own right: mintchips are more like banknotes backed by traditional FIAT (or maybe gold/bitcoin?). The mint promises to redeem them for whatever FIAT they're backed with (potential for fractional reserve banking here)
Someone more knowledgable correct me if I'm wrong.