Papers Published

1. Shayan, M; Bhattacharjee, S; Liang, TC; Tang, J; Chakrabarty, K; Karri, R, Shadow attacks on MEDA biochips, Ieee/Acm International Conference on Computer Aided Design, Digest of Technical Papers, Iccad (November, 2018), ACM Press [doi] .
   (last updated on 2022/12/30)

   Abstract:
   The Micro-electrode-dot-array (MEDA) is a next-generation digital microfluidic biochip (DMFB) platform that supports fine-grained control and real-time sensing of droplet movements. These capabilities permit continuous monitoring and checkpoint-based validation of assay execution on MEDA. This paper presents a class of "shadow attacks" that abuse the timing slack in the assay execution. State-of-the-art checkpoint-based validation techniques cannot expose the shadow operations. We develop a defense that introduces extra checkpoints in the assay execution at time instances when the assay is prone to shadow attacks. Experiments confirm the effectiveness and practicality of the defense.