Physical unclonable function

<p>A physical unclonable function (sometimes also called physically-unclonable function, which refers to a weaker security metric than a physical unclonable function ), or PUF, is a physical object whose operation cannot be reproduced ("cloned") in physical way (by making another system using the same technology), that for a given input and conditions (challenge), provides a physically defined "digital fingerprint" output (response) that serves as a <a href="/facts/Unique_identifier/NMcgc7qX">unique identifier</a>, most often for a semiconductor device such as a microprocessor. PUFs are often based on unique physical variations occurring naturally during semiconductor manufacturing. A PUF is a physical entity embodied in a physical structure. PUFs are implemented in <a href="/facts/Integrated_circuits/fjn6vg7C">integrated circuits</a>, including <a href="/facts/Field-programmable_gate_array/M8LSGcAU">FPGAs</a>, and can be used in applications with high-security requirements, more specifically <a href="/facts/Cryptography/e94PEVau">cryptography</a>, <a href="/facts/Internet_of_Things_(IoT)/rwwGAxn3">Internet of Things (IOT)</a> devices  and <a href="/facts/Privacy_and_blockchain/QA2spuHK">privacy</a> protection.
</p>

Physical unclonable function open-in-new

Physical unclonable function