A few months ago, a Swedish company gained international headlines after launching an internal program under which staff were encouraged to have themselves implanted with security micro-chips.
Now, in a sign the technology is catching on, Sweden's state-run public transport provider "SJ" has got in on the action.
It's now allowing commuters to travel on its trains with just a wave of their hand.
Stephen Ray, spokesman for Sweden's Rail Provider SJ
Lina Edstrom, spokeswoman for Sweden's Rail Provider SJ
Ben Libberton, microbiologist, Karolinska Institute