Obfuscation of Digital Systems using Isomorphic Cells and Split Fabrication

摘要

Hardware security has become a vital issue, and has recently gained increasing attention. In this paper, we propose obfuscation algorithms that improve the security of digital systems, and protect them against reverse engineering attempts. Metrics for measuring the obfuscation level of digital designs that implement our approaches are also introduced. The introduced algorithms are mainly based on the concepts of split fabrication, isomorphic gates and optimized isomorphic gates, and a new concept we introduce based on the inclination of logic gate outputs towards a specific output (1 or 0). Experimental results show improvements in the figures that represent the security of designs based on the introduced metrics.