“Motorola shows off insane electronic tattoo and ‘vitamin authentication’ prototype wearables” on The Verge:

At the D11 conference today, Regina Dugan, SVP for advanced technology and projects at Motorola, showed off some advanced projects. The first was a prototype electronic tattoo on her arm from MC10, about which she quipped “teenagers might not want to wear a watch, but you can be sure they’ll wear a tattoo just to piss off their parents.”

The second technology was even wilder: a pill from Proteus Digital Health that you can swallow and which is then powered by the acid in your stomach. Once ingested, it creates an 18-bit signal in your body — and thereby makes your entire person an “authentication token.” Dugan called it “vitamin authentication.” Motorola CEO Dennis Woodside, who earlier confirmed the Moto X phone, added that the Proteus pill was approved by the FDA.