Towards a Unified Hardware-Bound Logic Encryption Framework with Tiered Licensing for Secure Intellectual Property Protection in Integrated Circuits

This conceptual paper presents a unified framework that integrates hardware-level security primitives, particularly Physical Unclonable Functions (PUFs), with advanced logic encryption techniques to create a robust, tiered, and hardware-bound protection mechanism for hardware intellectual property (IP) in integrated circuits (ICs). The proposed ``triple-bind'' paradigm combines an encrypted logic netlist, a device-specific identifier derived from PUFs, and a multi-tiered activation key represented as a 32-character hexadecimal sequence to balance usability and cryptographic strength. This architecture addresses risks such as IP piracy, reverse engineering, unauthorized overproduction, and insider exfiltration. A formal mathematical model is provided, including detailed explanations of notations, key generation, binding protocols, and security analysis, supported by reproducible Python simulations of PUF behavior and key derivation. Empirical metrics, sensitivity analyses, and Bayesian uncertainty quantifications demonstrate the framework's robustness and practicality. Comprehensive comparisons with other logic encryption techniques, including detailed tables, highlight the advantages of the proposed approach. This work advances hardware security by establishing a scalable foundation for hardware-enforced digital rights management (DRM) in circuit IP.