Quantum Readiness Day: How to Prepare for Post-Quantum Security

Quantum Readiness Day on September 24 is a useful reminder that the security work we do today is not only about preventing breaches tomorrow. It is about protecting data and digital trust for years to come.

As a CISO Advisor and Quantum Security Lead for the Association of Information Security Professionals (AiSP) in Singapore, I see quantum readiness as a governance and engineering program, not a single technology upgrade. The industry conversation often starts with post-quantum cryptography, but the real challenge is broader. It includes understanding what your organization must keep confidential for a long time, mapping where cryptography is embedded across systems, engaging vendors early and building the ability to migrate cryptographic algorithms without a painful redesign.

What Quantum Readiness Day means for the Industry

Quantum readiness is industry-wide because cryptography is woven into nearly every part of modern operations. It is used to secure communications, authenticate users and devices, verify software integrity and anchor trust through certificates and signatures. As quantum computers advance, the risk shifts toward public key systems that could be broken faster than organizations can respond.