Patent ID: 9712166
Date: 2017-07-18
CPC Classifications: G06F,G09C,H03K,H04L

Claim:
1. A data generating device, comprising: a ring oscillator; a plurality of flip-flop circuits which are connected in series, each of which has a D terminal and a clock terminal, the flip-flop circuits including at least first to third flip-flop circuits, the first flip-flop circuit being located at a head of the series, the second flip-flop circuit being located at an end of the series, the third flip-flop circuit being located between the first and second flip-flop circuits, the D terminal of the first flip-flop circuit being directly connected to an output of the ring oscillator, an output of each of the first and third flip-flop circuits being connected to the D terminal of a flip-flop circuit following thereupon, and the clock terminals of the flip-flop circuits being directly connected to the output of the ring oscillator, respectively; and a generator that generates a first ID for authentication based on one or more values outputted from the flip-flop circuits immediately after the ring oscillator is turned on.