New answers tagged one-way-function
Yes, a Merkle–Damgård hash can be one-way. Even MD5 hasn't been broken in that way. Target collision resistance (TCR) is a notion similar to second preimage resistance (but for keyed functions). Preimage resistance, i.e. one-wayness, does not imply second preimage resistance, so a hash function can be one-way without even having second preimage resistance. ...
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