It was first introduced in the iPhone 5S Home ... by the sensor is compared to a value stored in the Secure Enclave. If it matches one of the stored values, then the fingerprint is a match ...

“The iPhone 5s features a 64-bit apps processor, low-power Double Data Rate 3 (LPDDR3) DRAM, and a novel fingerprint sensor—features that have never before been seen in a smartphone,” said Andrew ...