How ChipDNA PUF technology boosts a secure IC’s security level

September 1, 2021

By Maxim Integrated

ChipDNA is Maxim’s implementation of a PUF. A PUF is a function – a relation between some input parameters and an output value – derived from some variable properties of a micro circuit. Circuits have unpredictable and uncontrolled physical properties, such as the threshold voltage of a transistor, or delays of the stages of a ring oscillator. Even when they have the same logical design, all circuits are different when it comes to atoms because of natural, fundamentally random variations of the manufacturing process.

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