# Quantum Hardware Closes on Cryptanalysis

As quantum machines steadily enlarge the problems they can solve on real hardware, demonstrations of cryptanalytic primitives keep advancing, pushing post-quantum migration from precaution toward necessity.

- Conviction: 40 / 100 (forming)
- Horizon: Emerging (watchlist)
- Tracking since: 2026-07-22T00:00:00.000Z
- Last updated: 2026-07-22T05:55:58.826Z
- Canonical: https://polylog.news/ai/trends/quantum-threat-to-cryptography
- Publisher: Polylog
- Affected regions: Global

## Recent evidence

- [confirms] Researchers Run Textbook Quantum Cryptanalysis on Real IBM Hardware (2026-07-22): Researchers ran Simon's algorithm on an IBM Heron-generation machine to recover hidden periods in an Even-Mansour cipher structure, scaling from N=4 to N=10 — a textbook cryptanalytic primitive executed on real quantum hardware, advancing the timeline that pushes post-quantum migration toward necessity.