Model: other
Statements with model: other. This page only exists because at least one statement currently uses this value – if you add a statement with a new model value not listed under Problems, copy this page as the starting point for its facet page (see CONTRIBUTING.md).
| Status | Statement | Tags |
|---|---|---|
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6-round Feistel indifferentiability Whether 6-round Feistel is fully indifferentiable from a random permutation is open, bridging the proven r=5 attack and the proven r>=8 construction. 2 open |
othertight-boundresearch-opennew-idea (ai) | |
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No key agreement from GC-OWF Open for round complexity growing with the security parameter. Proved in full for two messages, which is public-key encryption; the constant-round extension is sketched in the paper’s appendix without a theorem, its security half deferred to the PKE proof. 5 open |
otherseparationresearch-openadaptation (ai) | |
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OWFs are black-box useless for key agreement Open in the general case, which the paper names as the central open problem left by its work. Settled for three restricted protocol classes: constant-query perfect, constant-round constant-query imperfect, and Merkle-type. 6 open |
otherimpossibilityresearch-opennew-idea (ai) | |
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OWFs are black-box helpful for CRHFs Open in both directions. Two relaxations — distributional and class-reduction helpfulness — are proved conditional on the Simon-oracle amplification conjecture; neither yields the universal auxiliary primitive the full statement needs. 5 open |
otherseparationresearch-opennew-idea (ai) | |
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Simon-oracle amplification, strong version Open. The version without the collision finder is known only when the one-way function is itself a random oracle; with an arbitrary one-way function, with or without the collision finder, nothing is established. 5 open |
otherlower-boundresearch-opennew-idea (ai) |
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