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When Algebraic Structure Meets Too Many Hints
eprint.iacr.orgpaper

When Algebraic Structure Meets Too Many Hints

"When Algebraic Structure Meets Too Many Hints" is an ePrint paper (2026/2654) arguing that DDGR hint classes and too-many-hints thresholds are not standalone side-channel security metrics. In synthetic Kyber-512 experiments, NTT-domain residues recover the full secret with about half the hints the uniform mod-q bound predicts. Finite-precision FFT samples need 25% to 55% of the budget for uniform perfect hints. No new attack optimizations are proposed.

TL;DR Shows that NTT and FFT leakage structure lets Kyber-512 secrets be recovered with far fewer hints than uniform-threshold metrics predict.
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Organisations named here

  • DDGR
  • FFT
  • LLL
  • MLWE with Hints
  • NTT
  • Partial Key Exposure
  • too-many-hints

Technologies named here

  • DDGR hint framework
  • Kyber-512
  • Too-many-hints threshold analyses
  • ML-KEM

Techniques named here

  • Side-channel hints on LWE secrets
  • Partial key exposure and MLWE with hints

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