Ultra‐energy‐efficient temperature‐stable physical unclonable function in 65 nm CMOS
Sha Tao, Elena Dubrova · Electronics Letters · 2016
Physical unclonable functions (PUFs) are promising hardware security primitives suitable for resource‐constrained devices requiring lightweight cryptographic methods. This Letter proposes an ultra‐low‐power and reliable PUF based on a customised dynamic two‐stage comparator operating in the sub‐threshold region. The proposed PUF is implemented in a standard 65 nm CMOS technology and validated through Monte‐Carlo simulations. Evaluation results show a worst‐case reliability of 98.3% over the commercial temperature range of 0°C to 85°C and 10% fluctuations in supply voltage. In addition, the 128‐bit PUF array consumes only 1.33 μW at 1 Mb/s, which corresponds to 10.3 fJ/bit, being the most energy‐efficient design to date.