Analysis of circuits for security using logic encryption

Abstract

Logic encryption is a technique to protect the design from several security vulnerabilities. Strength of the security depends on the nodes chosen for encryption. Fault Impact based node selection is one of the techniques used in encryption. Here, the hamming distance of various circuits on giving wrong key to the encryption module have been analyzed. Circuits are analyzed for both fault impact based node selection and connectivity based selection. Some of the circuits give better hamming distance for the fault impact based node selection and some for connectivity based selection. So, the selection of nodes depends on various factors and is unique for circuit.