Is Post-Quantum Encryption Widely Adopted Yet?

As security professionals have realized, the countdown to post-quantum encryption isn’t just for niche researchers anymore; the need for post-quantum cryptography (PQC) is here.

With more and more quantum computing breakthroughs emerging from labs [source], the conversations around PQC encryption have shifted from “if” to “when.” But a big question remains: Is post-quantum encryption widely adopted yet?

In this article, we’ll break down:

• Why is post-quantum encryption becoming essential for data security.
• The current adoption landscape for PQC encryption across industries.
• Practical challenges in adopting post-quantum asymmetric encryption.
• Steps your organization can take now to prepare.

The time is now for CISOs, architects, and security-conscious business leaders to align their crypto strategies with a post-quantum world while also reducing disruption and risk.

Why Is Post-Quantum Encryption Becoming Essential?

Quantum computers, when mature enough, will be able to break widely used cryptographic schemes like RSA and ECC, which currently safeguard everything from online banking accounts and transactions to sensitive healthcare data.

While today’s quantum computers cannot yet break these algorithms, advances in superconducting qubits and error correction suggest that practical quantum machines may arrive sooner than anticipated.

It’s not just about theoretical risks. The threat of “store now, decrypt later” attacks is real: malicious actors can steal and store encrypted data today, with plans to decrypt it later when quantum capabilities become available. This means that data requiring long-term confidentiality is already at risk.

Standards bodies are also moving quickly. The NIST Post-Quantum Cryptography Project [source] has been selecting and standardizing post-quantum cryptographic algorithms like Kyber for key encapsulation and Dilithium for digital signatures to replace vulnerable schemes. This is shifting post-quantum encryption from a research concern to a practical security priority for governments, financial institutions, and enterprises that need to keep data confidential for the long term.

The Current State of PQC Encryption Adoption

Despite the clear need, adoption of PQC encryption remains in its early stages across most industries. Many organizations are still at the assessment or pilot phase, working to understand:

• Where cryptography is used across applications, devices, and workflows.
• What data requires protection for years or even decades.
• Which post-quantum algorithms best align with operational and compliance needs?

For instance, the financial services and healthcare sectors have shown early leadership in piloting post-quantum asymmetric encryption to protect sensitive data with long-term implications. Yet the majority of enterprises have not fully migrated, instead opting for test environments and hybrid cryptographic models.

A recent Deloitte and World Economic Forum whitepaper [source] found that many organizations say they need more guidance on how and when they need to act. This is not surprising; crypto migration is complex and requires cross-team collaboration, policy updates, and infrastructure changes. It’s a huge but necessary undertaking.

In addition, while sectors governed by strict compliance, such as critical infrastructure and defense, actively monitor quantum developments to align their security postures, large-scale PQC encryption deployments are rare. Widespread adoption is likely to gain momentum as NIST finalizes standards, and compliance bodies begin issuing timelines and mandates for migration.

Challenges Slowing Post Quantum Asymmetric Encryption Readiness

Transitioning to post-quantum asymmetric encryption is not as straightforward as flipping a switch. Several challenges slow the process, including:

Integration complexity: Post-quantum cryptographic algorithms often come with larger key sizes and different computational requirements compared to legacy algorithms like RSA or ECC. This means stringent testing will be needed to avoid disruptions in network performance, storage, and latency.

No clear timeline: Quantum computers that can break today’s cryptographic standards don’t exist yet, and the timeline for when they arrive is uncertain. This makes it challenging for organizations to prioritize PQC encryption migration over immediate operational and security concerns. Still, those who wait too long will pay.

Hardware and ecosystem constraints: Many organizations rely on hardware security modules (HSMs), PKI systems, and embedded devices that are not yet compatible with post-quantum encryption standards. Upgrades require organizations to reevaluate vendors and budgets, which can further extend timelines.

Regulatory guidance: While some governments have issued guidelines for quantum readiness, many are still catching up. For example, the European Union Agency for Cybersecurity (ENISA) has released guidelines [source] to help organizations prepare for quantum-safe cryptography, but clear migration mandates are still on the way.

Skills and awareness: Post-quantum encryption requires teams with specialized cryptographic knowledge, and most organizations aren’t there yet. Building this knowledge base or finding experienced partners will play a significant role in reducing migration risks.

Preparing for Post-Quantum Encryption Now

PQC encryption adoption may not be widespread yet, but there are several proactive and meaningful steps you can take to prepare now. These include:

1. Conducting crypto inventory. You should first identify where cryptography is used across your organization, including apps, cloud environments, third-party dependencies, and devices. This gives you the visibility needed to prioritize high-risk areas first.

2. Classifying data based on longevity. Identify data that needs to remain confidential for years or decades. This data should be prioritized for early migration to post-quantum encryption to mitigate “store now, decrypt later” threats.

3. Evaluating PQC algorithms. Review and test NIST-selected algorithms, such as Kyber and Dilithium, to assess their performance, compatibility, and integration requirements within your specific infrastructure.

4. Exploring hybrid approaches. Hybrid cryptographic schemes, which combine classical and post-quantum asymmetric encryption, allow organizations to prepare for the quantum era while maintaining compatibility with current systems.

5. Monitoring standards and regulations. Track updates from NIST, ENISA, and other regulatory bodies to align your PQC encryption strategy as standards evolve. This allows your organization to stay compliant while avoiding rushed migrations later.

6. Building internal awareness. Educate and train security teams on the importance of quantum readiness, cryptographic agility, and the practical steps for migration. Proactive education reduces resistance and complexity during the migration process.

7. Partnering with experts. Working with trusted security providers can make your quantum readiness journey much more digestible. Solutions that support cryptographic agility will help your organization migrate to post-quantum encryption with minimal disruption.

The Verdict: Not Yet, But Soon

While post-quantum encryption isn’t yet universally adopted, the landscape is moving fast. The tech needed to break classical encryption may still be years away, but the time required to migrate entire organizations to PQC encryption can also be significant.

Security pros understand it well: cryptographic migrations under tight timelines are risky and disruptive. Those who prepare now by testing post-quantum asymmetric encryption and aligning strategies with emerging standards give themselves the best chance of protecting their data against future quantum threats while keeping risk at a minimum.

Make no mistake; the quantum era is coming. And those who start planning today will be best positioned to protect sensitive data tomorrow.

Ready to prepare your organization for post-quantum encryption? Request a demo for Fortanix’s quantum-ready data security platform to start your journey toward cryptographic agility and future-proof security.