Reconfigurable unique key generation using variable duty cycle PUF

Abstract

The security of the cryptosystem relies upon the soundness of cryptographic calculation and the key utilized for encryption. Private or secret key calculations can be followed out, and utilized as a part of correspondence can likewise be stolen. The PUF structures gives the secret key in a way such that the keys can’t be recovered by some other modeling technique. This work gives focus for ring oscillator PUF circuit which is utilized for secret key (arbitrary key) with variable duty cycle. The temperature assortment and biasing voltage influences the ring oscillators’ execution, which thus influence the secret key created from it by adjusting its value. To lessen this, a ring oscillator with stable yield reaction is proposed in this work. The uneven duty cycles idea is connected for the secret key production. Notwithstanding that, the reconfigurability of the cryptosystem is expanded with one of unique character lines of every individual. The proposed ring oscillator is robust against security attacks. This model is worked out in 25 nm CMOS technology with reduced area and not presenting extra number of stages and error correcting mechanism.