The Post-Quantum Cryptography Migration Is Already Underway—Here's What Businesses Need to Know

Governments are moving at different speeds and potentially adopting different standards. The US has set 2030 and 2031 timelines for federal systems to adopt NIST-approved PQC standards, while the EU is directing member states to begin migration by the end of 2026, with critical infrastructure transitioning by 2030, and China is expected to publicize national post-quantum encryption standards within the coming years. These diverging approaches create a fragmented global landscape.

When governments and suppliers move at different speeds and potentially adopt incompatible standards, businesses face incompatible systems, new compliance obligations, higher replacement costs, and temporary service disruptions. Companies modernizing their own infrastructure could still encounter systems that cannot communicate with suppliers, partners, or payment processors still using legacy cryptography.

Organizations often do not fully map or control the full scope of cryptographic components in their operating environment. Software, hardware, digital certificates, embedded systems, and third-party platforms all rely on encryption that may need replacement. Airlines, banks, hotels, telecommunications providers, cloud platforms, and payment networks are tightly interconnected, meaning encryption upgrades by one organization directly impact all the others sharing those systems. 

Beyond immediate compatibility challenges, post-quantum cryptography migration addresses a longer-term exposure often referred to as the harvest now, decrypt later threat. Adversaries can collect encrypted information today and retain it for future decryption if sufficiently capable quantum computers become available. Corporate intellectual property, financial records, biometric data, passenger information, and sensitive communications could remain exposed long after their initial collection. This makes the age and sensitivity of information more critical than whether quantum computers currently exist.

Organizations that identify sensitive data and cryptographic dependencies early will be better positioned to prioritize upgrades, manage costs, and reduce supplier exposure. 

The most difficult challenge may be third-party cryptographic dependencies. A company can modernize its own systems but remain vulnerable through a cloud provider, payment processor, SaaS platform, telecommunications carrier, airline system, or financial institution that continues using legacy cryptography. This third-party exposure is particularly acute for long-lived operational technology, aircraft systems, airport equipment, payment terminals, and transportation infrastructure that remain in service for years.

International travel companies, financial institutions, and multinational businesses with complex supply chains face the highest exposure. A single legacy platform operated by a supplier can constrain migration across an entire airline, airport, hotel group, payment network, or transportation provider. 

The operational effects of post-quantum encryption adoption will emerge gradually through system upgrades, supplier transitions, and differing national requirements. Employees and travelers will likely encounter these changes indirectly through routine application updates, new authentication requirements, digital identity changes, and payment platform modifications rather than through identifiable quantum security measures.

Businesses that treat PQC migration as a strategic priority now, identifying sensitive information requiring long-term protection, mapping cryptographic dependencies, and assessing supplier readiness, will have greater control over costs, compatibility, and the protection of critical data throughout this transition. 

Crisis24's full Strategic Outlook includes a more in-depth assessment of post-quantum cryptography migration and the implications of evolving compliance requirements, interoperability challenges, and third-party dependencies for global businesses.