MEDASec: Logic Encryption Scheme for Micro-electrode-dot-array Biochips IP Protection
GLSVLSI(2021)
摘要
ABSTRACTAs the next generation of digital microfluidic biochips (DMFBs) platform, Micro-electrode-dot-array (MEDA) has sea-of-micro-electrodes that support fine-grained control of the droplet and constant real-time monitoring of droplet paths. As MEDA biochips are expected to be had a booming market in the near future, their security, especially the protection of intellectual property (IP), has become the focus of the academic community. In this paper, we first propose a logic encryption-based IP protection scheme for MEDA biochips, called MEDASec, which is without modifying the structure. Our scheme aims to hide the droplet mix-split operation in bioassay, making the IP akin to a black-box in the manufacturing process. Besides, increasing computing power has facilitated the threat of brute force attacks on the secret key. In response to the brute force attack, we propose security metrics for the first time, called RRA, to evaluate the ratio of reagents that result from biochemical reactions. Experimental results on multiple bioassays demonstrate the effectiveness of the proposed logical encryption strategy against the brute force attack.
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