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SHA-256 is part of the SHA-2 family of hash functions with a 256-bit output and a 128-bit security level.

9 votes
2 answers
872 views

Is there a guarantee that for each possible hash y there exists a number x such that with ha...

Specifically talking about SHA-256 here and its involvement in Bitcoin, this was a question someone asked me which I didn't know the answer to. Yes, I am aware that SHA-256 can only have a hash from $ …
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