None
An expected property of a cryptographic hash function whereby it is computationally infeasible to find a second preimage of a known message digest, See “Second preimage”.
Source(s):
NIST SP 800-106
An expected property of a hash function whereby it is computationally infeasible to find a second preimage of a known message digest, See “Second preimage”.
Source(s):
NIST SP 800-107 Rev. 1