Well I think it is probably less invasive than something that scans your brain to get authentication but so far not as permanent as your brain.

Here is the latest, Motorola recently announced it is looking at alternatives to traditional passwords in a bid to make logging into online sites, or accessing mobile phones, more secure.

Among the ideas discussed at the D11 conference in California were electronic tattoos The tattoos, developed by Cambridge, Massachusetts-based engineering firm MC10, contain flexible electronic circuits that are attached to the wearer's skin using a rubber stamp.

courtesy of M10

MC10 originally designed the tattoos, called Biostamps, to help medical teams measure the health of their patients either remotely, or without the need for large expensive machinery.

Motorola claims that the circuits, which also contain antennae and built-in sensors, could be adapted to work with mobile phones and tablets. The mobile devices could then be used to confirm the owner's identity and log them in to accounts automatically.

This would prevent thieves and other people from being able to access a phone, or individual apps on the device, if it is stolen or lost.

These digital tattoos are far from permanent though two weeks is the approximate amount of time they stay attached.

Until then CLICK HERE for How To Create a Secure Password.