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No. What you're describing is just a subset of preimage attacks. Not having knowledge of x is just one type of preimage attack, a "preimage resistance". You ca
by avar 11y ago
No. What you're describing is just a subset of preimage attacks.
Not having knowledge of x is just one type of preimage attack, a "preimage resistance". You can also know x, then it's a "second-preimage resistance".[1]
Which is not the same as a collision attack. Where you're trying to find x and y such that h(x) = h(y) without anyone specifying x or y in advance.
By definition a collision attack is an attack where you specifically craft both x and y such that they exploit weaknesses in the algorithm.
It's not enough to know an arbitrary x or y that someone else has made, because that value isn't going to be exploiting the weakness.
1. https://en.wikipedia.org/wiki/Preimage_attack https://en.wikipedia.org/wiki/Preimage_attack
- hatsunearu 11y agoyeah, you're right. my bad.
- mceachen 11y ago(how many sites on the internet have a discussion where people are both patient and civil with each other, and the discussion results in mutual understanding?)
- hatsunearu 11y agoHmm, I personally haven't seen action in discussion where this kinda stuff doesn't happen; maybe I just pick the comments I reply well.