Computer scienceAlgorithms and Data StructuresAlgorithmsPrinciples and techniquesHashing

Cryptographic hash functions

SHA256

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As mentioned in the theory, SHA256 satisfies pre-image resistance and collision resistance properties. As a consequence, which statements are true about this cryptographic hash function?

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Small changes of input values produce huge differences in hash values.

SHA256 is only theoretical and has no practical uses.

It is easy to find two different messages with the same hash value.

Its output is always 2, 5, or 6 bit long.

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