AppleInsider was on hand for the presentation where Moody revealed that the first version of the sensor was called FingerLoc. The sensor came in a large box much bigger than an iPhone and was connected via a ribbon cable to an even larger device that powered it.
The company took its prototype and demoed it to various high tech companies. Unfortunately, the demo sometimes didn't go as planned. For example, it identified IBM's CTO as AuthenTec co-founder Dale Setlak.
Eventually the 'piece of silicon' that drove FingerLoc was improved over time. "We convinced people that the signal processing and work could be shrunk into an exceedingly small sensor that we eventually got down to 80 cents," said Moody.
The metal ring around early prototype scanners, just like the one in the iPhone 5s home button, works like a capacitor, sending a signal through the user's finger that allows it to sense through the outer layer of dead skin, into an inner layer where the skin is alive. Moody said AuthenTec worked closely with a number of dermatologists in development to perfect the technology.
As AuthenTec resolved the size and technology issues with their sensor, they generated interest from various customers including Apple, Motorola, and Fujitsu. Eventually Apple bought the entire company for $356 million.
"We had a great team of engineers — which I think is highlighted by the fact that Apple kept the engineering team," he said. Moody also noted that the company was driven by a desire to make user's lives easier. "I didn't care about government standards for fingerprint sensors, I cared about low cost and identifying you in a cheap and accurate way," he said. "I'm not hooked to the tech, but what I'm hooked into is what the tech can do for you, the user."