QuantumProof Risk Office • August 22, 2025 • 5 min read

Risk Windows & Cutover Strategies

As organizations flip from classical signatures to quantum-safe rails, they pass through risk windows—periods when both systems coexist. Handling those windows well is the difference between a smooth migration and a regulatory nightmare.

Define Your Windows

Preparation (60–90 days): Dual-stack verification is live but classical signatures still clear. Objective: migrate 60% of volume.
Enforcement (30 days): Classical signatures require manual review, fees increase, and fraud monitoring triples.
Final Cutoff (7 days): Classical signatures stop clearing automatically; emergency exceptions require executive approval.

Window	Primary Risk	Mitigation
Preparation	User inertia	Automated prompts, migration incentives, detailed dashboards
Enforcement	Operational overload	Dedicated migration desk, automated queue triage
Final Cutoff	Residual high-value accounts	Manual outreach, pre-approved emergency procedures

Communicate Relentlessly

Recommended Cadence

Weekly status email to regulators and insurance partners.
Daily alerts to internal leadership with migration percentages.
In-product banner counting down to cutoff date.

Leverage QuantumProof

QuantumProof’s validators enforce protocol-level 2FA, so even if classical keys leak during coexistence windows, attackers can’t move funds. Once the window closes, organizations can disable classical signature acceptance entirely and rely on quantum-safe and 2FA-backed transactions.

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