International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Paper: VITI: A Tiny Self-Calibrating Sensor for Power-Variation Measurement in FPGAs

Authors:
Brian Udugama , School of Computer Science and Engineering, University of New South Wales, Sydney, Australia
Darshana Jayasinghe , School of Computer Science and Engineering, University of New South Wales, Sydney, Australia
Hassaan Saadat , School of Computer Science and Engineering, University of New South Wales, Sydney, Australia
Aleksandar Ignjatovic , School of Computer Science and Engineering, University of New South Wales, Sydney, Australia
Sri Parameswaran , School of Computer Science and Engineering, University of New South Wales, Sydney, Australia
Download:
DOI: 10.46586/tches.v2022.i1.657-678
URL: https://tches.iacr.org/index.php/TCHES/article/view/9311
Search ePrint
Search Google
Abstract: On-chip sensors, built using reconfigurable logic resources in field programmable gate arrays (FPGAs), have been shown to sense variations in signalpropagation delay, supply voltage and power consumption. These sensors have been successfully used to deploy security attacks called Remote Power Analysis (RPA) Attacks on FPGAs. The sensors proposed thus far consume significant logic resources and some of them could be used to deploy power viruses. In this paper, a sensor (named VITI) occupying a far smaller footprint than existing sensors is presented. VITI is a self-calibrating on-chip sensor design, constructed using adjustable delay elements, flip-flops and LUT elements instead of combinational loops, bulky carry chains or latches. Self-calibration enables VITI the autonomous adaptation to differing situations (such as increased power consumption, temperature changes or placement of the sensor in faraway locations from the circuit under attack). The efficacy of VITI for power consumption measurement was evaluated using Remote Power Analysis (RPA) attacks and results demonstrate recovery of a full 128-bit Advanced Encryption Standard (AES) key with only 20,000 power traces. Experiments demonstrate that VITI consumes 1/4th and 1/16th of the area compared to state-of-the-art sensors such as time to digital converters and ring oscillators for similar effectiveness.
BibTeX
@article{tches-2021-31663,
  title={VITI: A Tiny Self-Calibrating Sensor for Power-Variation Measurement in FPGAs},
  journal={IACR Transactions on Cryptographic Hardware and Embedded Systems},
  publisher={Ruhr-Universit├Ąt Bochum},
  volume={2022, Issue 1},
  pages={657-678},
  url={https://tches.iacr.org/index.php/TCHES/article/view/9311},
  doi={10.46586/tches.v2022.i1.657-678},
  author={Brian Udugama and Darshana Jayasinghe and Hassaan Saadat and Aleksandar Ignjatovic and Sri Parameswaran},
  year=2021
}