"When I walk into my studio, I just wave my hand at the alarm, and the alarm turns off," the tattoo artist said.

"Whenever someone shows up with security clearance, he will wave and the alarm is deactivated, the lights are turned on... it will start up the computer, the cash machine and so on," he added.

Oesterlund is one of the small but growing number of people around the world who has a grain-sized NFC (Near Field Communications) chip embedded in him.

In fact, so convinced is he that "this is the future" that he has two of them, one in his hand and the other in his arm.

"One year ago it was 'that's just stupid', or 'wow that's just awesome'. But now multinational companies are looking into it," he said, pointing to cybersecurity firm Kaspersky as an example.

The renowned cybersecurity company had brought in Oesterlund to carry out a live demonstration of chip implantation at the IFA consumer electronics fair in Berlin which opens to the public Friday.