What distinguishes cryptographic hashes' second preimage resistance property from its preimage resistance?

💡 Explanation

Second preimage resistance requires finding a different input that hashes to the *same* output as a *known* input, because preimage resistance only requires finding *any* input that hashes to a given output value, rather than a specific one; therefore, the differentiating factor is the presence of a specific original input rather than just any possible input.

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