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What is the SHA-256 hash if the input is null, i.e. an empty bitstring? (Not the hash of 0 or "0".)

Paŭlo Ebermann
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Geremia
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1 Answers1

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The result of SHA-256 of an empty string is:

e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Accordingly to this and this

Ruggero
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    Verified in Linux with e.g. sha256sum /dev/null and printf | sha256sum – mwfearnley Jul 25 '22 at 10:40
  • Verified in Python with

    import hashlib; m = hashlib.sha256(); assert m.hexdigest() == 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'

     – Simone Aonzo Jan 09 '24 at 16:20