Arrangement for Determining a Printed Circuit Board Identifier

An arrangement for determining a unique printed circuit board identifier, via which an electronic component which is fitted to a printed circuit board is uniquely linked to the printed circuit board, the arrangement comprising:

• at least one physical unclonable functions unit having ring oscillators which, by reference to frequencies of the ring oscillators, determines the unique printed circuit board identifier, said PUF unit being arranged in the electronic component;
• and
• delay elements which are fitted to the printed circuit board, an oscillator loop of each respective ring oscillator of the PUF unit being formed from a delay element;
• wherein the delay elements are formed as printed conductors which are routed on the printed circuit board;
• wherein each delay element comprises first sections which are routed on a first conductive layer of the printed circuit board, and comprises second sections which are routed on a second conductive layer of the printed circuit board;
• wherein the first sections of a respective delay element which are routed on the first conductive layer of the printed circuit board and the second sections of a respective delay element which are routed on the second conductive layer of the printed circuit board are connected via electrical through-contacts;
• and
• wherein two delay elements are each arranged on the printed circuit board such that, at at least one point, the respective first sections of the two respective delay elements overlap or intersect with the respective second sections of the two respective delay elements.