CryptoDB
Kevin Fu
NOTE: imports for ToSC and TCHES are no longer functioning.
Publications
Year
Venue
Title
2022
TCHES
Redshift: Manipulating Signal Propagation Delay via Continuous-Wave Lasers
Abstract
We propose a new laser injection attack Redshift that manipulates signal propagation delay, allowing for precise control of oscillator frequencies and other behaviors in delay-sensitive circuits. The target circuits have a significant sensitivity to light, and a low-power continuous-wave laser, similar to a laser pointer, is sufficient for the attack. This is in contrast to previous fault injection attacks that use highpowered laser pulses to flip digital bits. This significantly reduces the cost of the attack and extends the range of possible attackers. Moreover, the attack potentially evades sensor-based countermeasures configured for conventional pulse lasers. To demonstrate Redshift, we target ring-oscillator and arbiter PUFs that are used in cryptographic applications. By precisely controlling signal propagation delays within these circuits, an attacker can control the output of a PUF to perform a state-recovery attack and reveal a secret key. We finally discuss the physical causality of the attack and potential countermeasures.
Program Committees
- CHES 2019
Coauthors
- Wayne Burleson (1)
- Benjamin Cyr (1)
- Kevin Fu (2)
- Daniel E. Holcomb (1)
- Takeshi Sugawara (1)
- Kohei Yamashita (1)