A dual-mode successive approximation register analog to digital converter to detect malicious off-chip power noise measurement attacks

Abstract

An on-chip noise monitor using a dual-mode analog to digital converter (ADC) is developed to detect the insertion of off-chip components as malicious attempts of power noise measurement attacks. A two-step sampling scheme selecting either synchronous or asynchronous clocking enables both real-time monitoring and high-resolution diagnosis of power supply noise, respectively. The monitor detects the change in power-line impedance and assumes the happening of physical contacts by an attacker’s device. A wide-band ADC with the bandwidth of 1 GHz facilitates the analysis of on-chip captured waveforms and the recognition of potentially inserted devices. Fabricated in 65 nm CMOS, the on-chip noise monitor is examined for the detectability of series resistors as well as parallel capacitors that are intentionally inserted on power lines. The experiments demonstrated the detection of a power current sensor in series to power lines, and also the attachment of an oscilloscope probe, through the analysis of on-chip captured power noise waveforms.

Design of Circuits and Packaging Systems for Security Chips

“…Additionally, an on-chip voltage monitor (OCM) is equipped in an IC chip and measures voltage variations at the positions of interest over PDNs [23]. This helps to verify the design of crypto circuits for lower SCs and to provide the opportunity of detecting physical attack attempts [24].…”

Simulasi dan Pengukuran Rangkaian Konverter Analog ke Digital Resolusi 8 Bit Berbasis IC ADC0804 dan IC ADC0809

“…Dimana, sinyal analog berupa sinyal pembawa (carrier) dengan daya yang rendah dikonversi menjadi sinyal digital untuk diekstrak menjadi sinyal informasi (Manganaro, 2022;Neuhaus et al, 2021). Dengan demikian, konverter yang akurat sangat diperlukan untuk mendukung teknologi IoT (Wadatsumi et al, 2021).…”

Experimental Exploration of the Backside ESD Impacts on an IC Chip in Flip Chip Packaging

“…The OCM consists of an input buffer and an analog-to-digital converter (ADC) and outputs the voltage data to the off-chip in digital codes. The input buffer uses a source follower circuit to drive the signal over a wide bandwidth [30]. Though the voltage level on the target substrate is near V SS , the p-MOS source follower shifts the DC level into the input range of the ADC.…”