~/talks

Shuichi Hirahara

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  • ITCS2 editions2022–2023

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titleconferencedate
Capturing One-Way Functions via NP-Hardness of Meta-ComplexityMinimal Complexity Assumptions for Cryptography 20232023-05-01
Main theorem: a one-way function iff NP is worst-case hard and distributional Kolmogorov complexity is NP-hard under randomized polynomial-time reductions…
Talk on
Allender's Conjecture and its Impacts on Meta-ComplexityLower Bounds, Learning, and Average-Case Complexity2023-02-13
Allender’s conjectures are shown false under plausible collapses: reductions to Kolmogorov-random strings would imply EXP^NP = NEXP, so the hoped…
Talk on
Kolmogorov Complexity Characterizes Statistical Zero KnowledgeITCS 20232023-01-10
Main theorem: for any reasonable promise problem A, A in NISZK iff A RP many-one reduces to RK (with RK using approximation error e(m) ≈ Θ(log^2 m)), and A in…
Talk on
Learning versus Pseudorandom Generators in Constant Parallel TimeITCS 20232023-01-10
Proves an equivalence: existence of polynomial-stretch pseudorandom generators computable in NC0 is characterized by average-case hardness of weak learning for…
Talk on
Excluding PH PessilandITCS 20222022-01-31
Proves unconditionally that PH Pessiland excluded by showing PH-average hardness is equivalent to existence of a PH-confutable pseudorandom generator (PH-PRG)…
Talk
Errorless versus Error-prone Average-Case ComplexityITCS 20222022-01-31
Paper proves reductions between error-prone heuristics and errorless average-case algorithms by building on non-adaptive average BPP/poly instant checker…
Talk
Average-case Hardness of NP and PH from Worst-case Fine-grained AssumptionsITCS 20222022-01-31
Proves concrete average-case hardness from weaker worst-case fine‑grained assumptions: improving on Hirahara’s 2^{O(N/log N)} threshold, the paper shows that…
Talk
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