BFM (B4 Flash Memory) is a new cryptocurrency based on Conditioned Proof Of Capacity (CPOC). Its main feature is to use B4 flash memory chip as a consensus participant, reduce the loss of temperature on the mining machine chip, improve the speed of chip rewriting and reading, provide the highest reliability storage, etc., thereby reducing the impact of cryptocurrency on power resources consumption, lower the participation threshold, make its production method more decentralized, and more secure and credible, so that everyone can participate in the mining of cryptocurrency, and generate credit and value through mathematical algorithms and distributed mining.