# Quantum Risk Moves From Theory to Crypto Roadmaps

Over the next 3-6 months, quantum-resistance becomes a concrete design and custody concern across major chains and institutional custodians, driving opt-in post-quantum schemes and 'long-dormant coin' risk discussion.

- Conviction: 100 / 100 (strengthening)
- 7-day move: 0
- 30-day move: +21
- Horizon: Medium term (3-9 months)
- Tracking since: 2026-06-15T00:00:00.000Z
- Last updated: 2026-07-31T14:00:05.007Z
- Canonical: https://polylog.news/crypto/trends/quantum-threat-reshapes-crypto-custody
- Publisher: Polylog
- Affected regions: Global

## Recent score history

- 2026-07-30: 100
- 2026-07-31: 100

## Recent evidence

- [confirms] Blockstream's Simplicity Goes Live on Liquid Mainnet With Post-Quantum Signatures (2026-07-31): Blockstream's Simplicity went live on Liquid mainnet with post-quantum signatures after eight years of development, with banks including Swisscom's and a Swiss cantonal lender writing lending contracts on it. Post-quantum schemes running real financial logic in production moves quantum-resistance from roadmap to shipped custody design, confirming the thesis.
- [confirms] An Anthropic AI Model Broke a Post-Quantum Signature Candidate in 60 Hours, Testing Crypto's Quantum Timelines (2026-07-30): An Anthropic AI model broke the HAWK post-quantum signature candidate in 60 hours, cutting the smallest configuration's key-recovery cost from 2^64 to 2^38 operations (~67 million times less work) for roughly a $100,000 API bill. It moves the quantum-resistance conversation from abstract timelines to a concrete finding that even post-quantum candidates are fragile and AI is accelerating cryptanalysis, sharpening urgency around migration and custody roadmaps.

23 more evidence entries, the full score history, the conviction-driver timeline, and affected assets are for subscribers: https://polylog.news/pricing