What is the SHA256 mining algorithm?

SHA256, or SHA256d (because SHA256 is applied doubly) is the first mining algorithm to be ever used, utilized by Satoshi in his creation of Bitcoin. As it is used to mine Bitcoin, it is the most revenue generating algorithm and has the most history behind it. SHA256 belongs to a family of cryptographic hash functions called SHA2 and was published by the National Security Agency in 2001. Satoshi presumably chose it as it was the newest standard and a significant improvement over the then more frequently used SHA1. In 2010, on bitcointalk.org, he explained: “SHA-256 is very strong. It’s not like the incremental step from MD5 to SHA1. It can last several decades unless there’s some massive breakthrough attack.”
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Join WariHash (Peer-To-Peer Hash Market) Alpha: Scrypt & SHA256d Mining Live!

Our team at Warihash is looking for more interested users (miners & buyers) to join our private alpha! WariHash provides users with the first decentralized market for hash where all parties can ensure that their transaction is secure. With us, payment flows directly from buyer to miner in the cryptocurrency of choice as Warihash audits each transaction. No need for deposits/withdrawals! Users can utilize unused or unprofitable mining hardware by simply setting your appropriate profit rate and allowing Warihash to find you a matching bid.
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