01 — Proof system · Failure mode

Buying post-quantum security you do not have

A hash-based system is chosen for post-quantum posture, but the deployed system wraps into a pairing SNARK, or the zero-knowledge property is only computational, or the surrounding signatures and key exchange remain classical. The property does not compose the way the decision assumed.

By MarketComp Updated 2026-09-12 v1.3 About the authors Changelog

Mitigation

Separate soundness from confidentiality and check each end to end. If a long-lived secret is hidden, the hiding property must itself be statistical or post-quantum — a hash-based proof system does not supply that by itself.

Cite this page

MarketComp (2026). Buying post-quantum security you do not have. The ZK Field Manual (Version 1.3). MarketComp. https://zkpick.com/proof-systems/failure-modes/buying-post-quantum-security-you-do-not-have/

@misc{zkfieldmanual-buying-post-quantum-security-you-do-not-,
  title        = {Buying post-quantum security you do not have — The ZK Field Manual},
  author       = {MarketComp},
  year         = {2026},
  version      = {1.3},
  howpublished = {\url{https://zkpick.com/proof-systems/failure-modes/buying-post-quantum-security-you-do-not-have/}},
  note         = {Accessed: YYYY-MM-DD}
}