Secure and Energy Efficient Physical Unclonable Functions

An Effort toward Building more Secure and Efficient Physical Unclonable Functions

Unconditionally secure credit/debit card chip scheme and physical unclonable function

The statistical-physics-based Kirchhoff-law–Johnson-noise (KLJN) key exchange offers a new and simple unclonable system for credit/debit card chip authentication and payment. The key exchange, the authentication and the communication are unconditionally secure so that neither mathematicsnor statistics-based attacks are able to crack the scheme. The ohmic connection and the short wiring lengths ...

On Foundation and Construction of Physical Unclonable Functions

Physical Unclonable Functions (PUFs) have been introduced as a new cryptographic primitive, and whilst a large number of PUF designs and applications have been proposed, few studies has been undertaken on the theoretical foundation of PUFs. At the same time, many PUF designs have been found to be insecure, raising questions about their design methodology. Moreover, PUFs with efficient implement...

A Formal Definition and a New Security Mechanism of Physical Unclonable Functions

The characteristic novelty of what is generally meant by a “physical unclonable function” (PUF) is precisely defined, in order to supply a firm basis for security evaluations and the proposal of new security mechanisms. A PUF is defined as a hardware device which implements a physical function with an output value that changes with its argument. A PUF can be clonable, but a secure PUF must be u...

Enhanced challenge-response set and secure usage scenarios for ordering-based ring oscillator-physical unclonable functions

The number of applicable challenge–response pairs (CRPs) in physical unclonable functions (PUFs) is critical especially for authentication protocols in security systems. Ideally, full read-out of all CRPs should be infeasible and CRPs should be independent from each other for a highly secure system. CRP concept is not defined in ordering-based ring oscillator (RO) PUFs presented in the literatu...