A Constructive High-Speed Crypto-mining Approach with Dual SHA-256 on an FPGA

Blockchain-based cryptocurrency has become extremely popular, especially in various mining approaches and scholarly research. Bitcoin is one of the highest-valued cryptocurrencies mined using many hashing algorithms. The speed and effectiveness of the mining system purely lie in the hash rate and mining board. In view of the mining approach, SHA 256 is one of the most popular and fastest hashing algorithms. In this paper, we propose a high-speed crypto-mining approach using dual SHA256 processing, and the results are compared with various semicustom application-specific integrated circuit (ASIC) architectures. The experimental results indicate an improvement in speed and power consumption of the proposed approach by 6.09% over standard SHA-256 with the Virtex-7 FPGA platform. Similarly, the proposed mining approach significantly improves functional efficiency by 13.40% over the existing hashing architecture. In view of the ASIC platform in comparison with existing hashing architecture, the proposed mining approach offers 13.67% and 16.32% improvement in functional efficiency with 180nm and 90nm respectively.