Late Breaking Results: Is Reconfigurable-Based Obfuscation Secure?

Reconfigurable-based obfuscation (REBO) techniques, such as eFPGA redaction, offer security against threats present in the globalized Integrated Circuit (IC) supply chain. Today, no attacks have succeeded in convincingly or fully breaking these techniques. At best, previous attacks have provided vulnerability analysis or have partially recovered a key (bitstream). This paper presents a novel attack to break the security of REBO. We propose a new attack to retrieve the design's bitstream and assess the effectiveness of the attack using the HeLLO CTF benchmarks. The success rate of our attack is between 57% and 62%, superseding all previous known results on these benchmarks.