The Banker Bot market is growing

Business Insider: LONDON (Reuters) - One of the founders of trading venue Chi-X Europe is joining the race to bring "blockchain" technology, the system that tracks and identifies transactions in digital-currency bitcoin, to the wider financial world.
The objective is to allow people to transfer cash or make payments instantaneously without a bank or clearing party being involved, saving on transaction costs.
A venture called SETL, led by former Chi-X head Peter Randall and hedge-fund investor Anthony Culligan, said on Monday its blockchain-inspired technology would simultaneously transact real-world currencies or assets and provide a "golden record" of the trade, which takes days on some financial markets.

There we go, peer to peer exchanges between smart cards.  Security,  in this case, is in the block chain code. All transactions are captured in a block chain, and remembered. If you try and spend the money twice then something blocks you, what? Eventually get caught.

SETL's network would work in the same way as the bitcoin blockchain, generated from each participant's server. The ledger of transactions would be stored on these servers, with encryption, but regulators or auditors would be given access to identify the parties involved.
SETL is not alone. Firms across the finance and technology space have been ramping up efforts to tap the potential of blockchain in overhauling the payment and settlement of financial assets, which currently use central authorities and clearing-houses to track and guarantee transactions.
International Business Machines Corp has been in informal talks about a blockchain-tied cash system with a number of central banks, Reuters reported earlier this year, while Nasdaq OMX last month announced a partnership with blockchain infrastructure provider Chain.

SETL is the name of the company. But they still rely ultimately on server verification and clearing houses.

Block chain has nice properties, it part of the Banker Bot protocol set. But if we have hardware keys, we have essentially block chained the hardware itself, the smart card is hardware tied to a specific security level, and the block chains graphs can actually overlap, putting our smart cards into more than one hardware chain; each hardware chain tamper proof, and all bots verify bot to bot exchanges at the hardware level. One solution to solve them all..  Dannica, our VP of Marketing has this problem solve.