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Results tagged with random-oracle-model
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user 4793
A model used in cryptographic security proofs, in which concrete primitives such as hash functions are replaced with a "random oracle": a hypothetical black box that maps its inputs to truly random outputs, but in such a way that the same input always yields the same output.
3
votes
0
answers
208
views
Unlinkability of Merkle-Damgård hash function results
Question: Are multiple outputs of a Merkle-Damgård hash function (or specifically SHA-256, if this can only be said for a specific algorithm) on unknown data unlinkable? If yes: Can this be formally p …
- 1,451
6
votes
1
answer
1k
views
One-Way property of Random Oracle
I'm currently working on a proof in the Random Oracle model, and could not find the formal argument on why the random oracle is one-way (i.e. for an Oracle $O$, it is easy to calculate $x=O(n)$, but n …
- 1,451