Computer scientists have devised a digital crypto-currency in league with the Bank of England that could pose a devastating threat to large tranches of the financial industry, and profoundly change the management of monetary policy.

The proto-currency known as RSCoin has vastly greater scope than Bitcoin, used for peer-to-peer transactions by libertarians across the world, and beyond the control of any political authority.

The purpose would be turned upside down. RSCoin would be a tool of state control, allowing the central bank to keep a tight grip on the money supply and respond to crises. It would erode the exorbitant privilege of commercial banks of creating money out of thin air under a fractional reserve financial system.

“Whoever reacts too slowly to these developments is going to take it on the chin. They will lose their businesses,” said Dr George Danezis, who is working on the design at University College London.

"My advice is that companies should play very close attention to what is happening, because this will not go away," he said. Layers of middlemen in payments systems face a creeping threat across the nexus of commerce, stockbroking, currency trading or derivatives. Many risk extinction over time.