What is Tensority?

Tensority is a novel proof-of-work algorithm that integrates artificial intelligence tensor computations into the mining process. Developed by the Bytom blockchain team, the algorithm uses matrix operations and tensor calculations that are fundamental to machine learning and deep learning workloads. The mining process involves generating a set of random matrices from the block header, performing tensor operations including matrix multiplications and transformations on these matrices, and then hashing the results to produce a proof-of-work output. This design intentionally makes the computational work performed during mining structurally similar to the operations used in training and running neural networks.

The most innovative aspect of Tensority is its philosophy of "useful proof of work" — the idea that the computational resources dedicated to mining should be applicable to real-world tasks beyond securing the blockchain. By requiring tensor operations that mirror AI computations, Tensority was designed so that hardware optimized for mining (specifically AI accelerators and tensor processing units) would also be efficient for machine learning workloads. This creates a dual-use scenario where mining hardware retains value beyond cryptocurrency mining. The algorithm is designed to be friendly to AI-specific hardware such as TPUs and matrix multiplication accelerators while being less efficient on traditional SHA-256-style ASIC miners. However, the practical realization of this dual-use benefit has been debated, as the specific tensor operations in mining may not directly translate to productive AI work without additional engineering.

Tensority was exclusively developed for and used by Bytom (BTM), a blockchain platform focused on connecting the digital world with the physical asset world. Bytom launched its mainnet in April 2018 with Tensority as its proof-of-work algorithm. The project was founded by Chang Jia, a well-known figure in the Chinese blockchain community, and was particularly prominent in the Asian cryptocurrency market. Bytom later transitioned to a proof-of-stake consensus mechanism, moving away from Tensority mining. Despite this transition, Tensority remains historically significant as one of the earliest serious attempts to create a proof-of-work system where the mining computation serves a purpose beyond blockchain security. It inspired subsequent projects to explore the concept of useful proof-of-work, an idea that continues to attract interest as the cryptocurrency industry grapples with the environmental impact of energy-intensive mining.