Take a look at this unassuming printed circuit worn by Regina Dugan, the former head of DARPA, during this week's AllThingsD conference. It actually has a far-reaching implication in the near future. Now at the Google-owned Motorola Mobility as its Senior Vice President for Advanced Technology and Projects, Dugan was on-stage to present the next phase in wearable computer designs, namely electronic tattoo and pills. Beyond the upcoming Google Glass and near the realm of science fiction, Dugan advocated these concepts as replacements for the vexing passwords, which none of us can remember. Much like RFID, authentication comes once the tattoo bearer is near the sensor. But the more intriguing project is the "password pill," an ingestible device powered by stomach acid. Able to transmit 18-bit data, it essentially transforms the person into a "giant password." Reminds you a bit of Johnny Mnemonic doesn't it?