Want to gain entry to your office, get on a bus, or perhaps buy a sandwich? We're all getting used to swiping a card to do all these things. But at Epicenter, a new hi-tech office block in Sweden, they are trying a different approach - a chip under the skin.

Felicio de Costa, whose company is one of the tenants, arrives at the front door and holds his hand against it to gain entry. Inside he does the same thing to get into the office space he rents, and he can also wave his hand to operate the photocopier. That's all because he has a tiny RFID (radio-frequency identification) chip, about the size of a grain of rice, implanted in his hand. Soon, others among the 700 people expected to occupy the complex will also be offered the chance to be chipped. Along with access to doors and photocopiers, they're promised further services in the longer run, including the ability to pay in the cafe with a touch of a hand.