Quantum Cyber: CISOs Face Data Debt, Crypto Agility, Signature Collapse

• Quantum cyber risks include "harvest now – decrypt later" attacks, making current supplier data a long-term liability.
• Transitioning to post-quantum cryptography (PQC) faces challenges like performance, cost, and resistance from legacy systems and vendors.
• Quantum attacks threaten to forge digital signatures, leading to integrity collapse in supply chains and impacting operations and compliance.
• CISOs must identify data vulnerable to quantum disclosure, update vendor contracts for PQC, and require escrow-level auditing.
• Key actions include creating a Crypto Bill of Materials, demanding crypto agility from suppliers, and staging PQC development to ensure supply chain continuity.

Why It Matters: Quantum cyber threats create urgent, complex risks for data, supply chains, and business integrity.