physically unclonable function (security) (PUF)

In networked systems, attacks against cybersecurity can be carried out via critical infrastructure components. Corresponding components can be found in all industrial, utility or medical facilities. To avoid such attacks on processors, Physically Unclonable Functions (PUF) is a security mechanism for uniquely identifying integrated circuits( IC).

The Internet of Things( IoT) provides many points of attack through which attackers can gain access to sensitive data or systems. Industrial systems, their sensors and actuators, systems of utilities, hospitals, traffic infrastructures and building automation are particularly at risk of attack. These must be protected in particular. Relevant cybersecurity standards series have already been developed for some of the applications mentioned. For example, IEC standard 62443 for cyber security in industrial automation or ISO standard21434 for automotive technology.

The PUF function, which is designed to prevent attacks on active components, is functionally comparable to a unique fingerprint of an integrated circuit. It establishes a relationship between several input and output values.