Definition
SHA-256 (Secure Hash Algorithm 256-bit) is a member of the SHA-2 family designed by the NSA and published by NIST. It produces a 256-bit hash from any input. Bitcoin’s Proof of Work specifically uses double SHA-256: the input is hashed twice in succession (SHA-256(SHA-256(block_header))).
SHA-256 is the reason Bitcoin ASICs exist. The algorithm’s operations (bitwise logic, addition, rotation) can be implemented extremely efficiently in custom silicon, leading to the development of specialized mining chips like the BM1366, BM1370, and others.
In Simple Terms
The cryptographic algorithm Bitcoin uses for mining. ASIC chips are designed specifically to compute SHA-256 at high speed.
SHA-256 is a term used in Bitcoin mining related to mining basics.
Also known as: Secure Hash Algorithm 256.
SHA-256 (Secure Hash Algorithm 256-bit) is a member of the SHA-2 family designed by the NSA and published by NIST. It produces a 256-bit hash from any input. Bitcoin’s Proof of Work specifically uses double SHA-256: the input is hashed twice in succession (SHA-256(SHA-256(block_header))).
SHA-256 is the reason Bitcoin ASICs exist. The algorithm’s operations (bitwise logic, addition, rotation) can be implemented extremely efficiently in custom silicon, leading to the development of specialized mining chips like the BM1366, BM1370, and others.
Understanding sha-256 is important for Bitcoin miners because it directly impacts mining operations, hardware selection, or profitability calculations. Whether you are a home miner running a Bitaxe or operating a larger ASIC setup, this concept helps inform better mining decisions.
Related terms: Double SHA-256, Hash, ASIC, Proof of Work.