P-Box Design in Lightweight Block Ciphers: Leveraging Nonlinear Feedback Shift Registers
Muhammad Rana, Quazi Mamun, Rafiqul Islam · 2024
In lightweight block cipher design, generating permutation boxes (P-boxes) is critical to security and efficiency. This paper introduces an innovative approach to P-box generation by integrating nonlinear feedback shift registers (NFSRs) to enhance cryptographic strength. NFSRs are known for their capacity to generate obscure and unpredictable sequences, making them a promising candidate for improving P-box design. This research investigates the intricacies of this novel method, highlighting its potential benefits and implementation challenges. The proposed NFSR-based P-box generation method offers improved diffusion properties, presenting an attractive option for creating secure and efficient lightweight block ciphers.