"Apple purchased fingerprint-reader specialist AuthenTec in 2012, and the U.S. government recently approved Apple's patent for its own fingerprint reader technology. The company, like other makers of fingerprint scanners, uses radio frequencies to map a finger's surface."
http://online.wsj.com/article/SB1000142412788732386460457906...
"Apple purchased fingerprint-reader specialist AuthenTec in 2012, and the U.S. government recently approved Apple's patent for its own fingerprint reader technology. The company, like other makers of fingerprint scanners, uses radio frequencies to map a finger's surface." http://online.wsj.com/article/SB1000142412788732386460457906...