While I look at this and think, “no way!” I strongly think that it will be very popular. It is only a small step from having the same sort of ever-present authentication and access in one’s phone. Americans have shown a great willingness to give a tremendous amount of personal access in exchange for convenience.

A Wisconsin company is to become the first in the US to microchip employees.

Three Square Market is offering to implant the tiny radio-frequency identification (RFID) chip into workers’ hands for free – and says everyone will soon be doing it.

The rice grain-sized $300 (£230) chip will allow them to open doors, log in to computers and even purchase food.

And so far, 50 employees have signed up for the chance to become half-human, half-walking credit card.