Last Updated
：2025/12/06
second preimage attack
Noun
Japanese Meaning
暗号学において、ハッシュ関数に対する攻撃手法の一種です。与えられたハッシュ値およびその対応する入力が存在する状況で、（総当たり攻撃よりも高速に）同じハッシュ値を生成する別の入力値（セカンドプリイメージ）を見つけ出す攻撃を指します。
（ plural ）
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(cryptography) An attack on a cryptographic hash function that is able to find a second preimage for a hash and its preimage; that is, given a hash and an input that has that specific hash, it is able to find (faster than by brute force) another input with the same hash.
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second preimage attack
Researchers demonstrated a second preimage attack against the legacy hash function, forcing a migration to more secure algorithms.
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Researchers demonstrated a second preimage attack against the legacy hash function, forcing a migration to more secure algorithms.
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