Anti-Piracy of Analog and Mixed-Signal Circuits in FD-SOI
Mariam Tlili, Alhassan Sayed, Doaa Mahmoud, Marie‐Minerve Louërat, Hassan Aboushady, Haralampos‐G. Stratigopoulos · 2022 27th Asia and South Pacific Design Automation Conference (ASP-DAC) · 2022
We propose an anti-piracy security technique based on locking for analog and mixed-signal circuits designed in FD-SOI. We show that obfuscating the body-bias voltages of tunable transistors is an effective way for inducing high functionality corruption. The obfuscation is achieved by constituting a secret key from the concatenation of the input digital codes of the body-bias generators that produce the correct body-bias voltages. We also propose a slight modification of the body-bias generator that increases prohibitively the time complexity of counter-attacks aiming at finding an approximate key. The proposed locking scheme is demonstrated on a Σ$$ modulator used in highly-digitized RF receiver architectures.