PPUF PPUF IoT IoT DATA TRANSFER METHOD BASED ON PUBLIC PHYSICALLY UNCLONABLE FUNCTION IoT COMMUNICATION SYSTEM BASED ON PUBLIC PHYSICALLY UNCLONABLE FUNCTION AND IoT DEVICE

摘要

The present invention relates to a public physically unclonable function (PPUF)-based data transmission method, which comprises the steps of: determining, by a transmitter, a first challenge value and a response value output at a reference time after the first challenge value is input, using delay characteristics of any PPUF; transmitting, by the transmitter, information including the reference time and the response value, and transmitting data encrypted by using the first challenge value as a secret key; receiving, by a receiver, the information, and determining a specific second challenge value for outputting the response value at the reference time from a challenge value input time point in a PPUF circuit having the delay characteristics; and decoding, by the receiver, the received encrypted data using the second challenge value as a secret key.