VLSI Secure communication: Advancements in Blowfish Algorithm for Secure Data Transmission

In the rapidly evolving field of Very Large-Scale Integration (VLSI) systems, securing communication channels is of paramount importance due to the increasing prevalence of cyber threats. This paper presents Modified Blowfish (MBF) algorithm employed for secured communication in VLSI systems. While the traditional Blowfish algorithm delivers a superior balance between security and performance, the improved version focuses on further improving encoding speed, reducing power consumption and reducing hardware footprint, which are important factors for VLSI implementations. The novel modifications are introduced in key expansion and encryption processes to increase the throughput and efficiency of the algorithm when implemented in hardware. The MBF algorithm leverages parallel processing capabilities and optimized data paths to achieve higher performance metrics compared to the traditional Blowfish implementation. Extensive simulations and hardware synthesis results demonstrate that the improved algorithm outperforms existing encryption standards in terms of speed and energy efficiency, making it ideal for real-time secure communications in resource-constrained VLSI environments.