In our previous blog, Preparing for the Quantum Future: Why Post-Quantum Cryptography Matters, we discussed why the quantum threat makes post-quantum cryptography (PQC) a strategic necessity rather than a distant concern. The remaining challenge is practical: how can organizations begin adopting PQC in real production environments, without disrupting applications or users?
For most modern architectures, the most effective starting point is the Application Delivery Controller (ADC).
ADCs: Where Cryptographic Policy Becomes Operational Reality
In today’s digital infrastructure, ADCs play a central role in managing, accelerating, securing, and monitoring application traffic across web applications, APIs, and hybrid or multi cloud environments. Just as importantly, they are where cryptographic policy is enforced at scale.
ADCs commonly terminate TLS connections, enforce cipher suite policies, and manage certificates for large volumes of traffic. As a result, they are not just traffic managers; they are cryptographic control points. When cryptographic assumptions must evolve, the ADC is often the most practical place to introduce that change in a centralized and controlled manner.
This becomes especially relevant as organizations prepare for a future in which widely used public-key algorithms such as RSA and ECC are no longer sufficient against quantum attacks. Even if today’s encrypted traffic appears secure, some of it may be vulnerable to future decryption if captured now.
Why ADCs Are a Natural Anchor for Post Quantum Cryptography
ADCs occupy a unique position in the application stack, which makes them particularly well suited for supporting post quantum cryptography.
Because ADCs already control how cryptographic protocols are negotiated and enforced, they allow organizations to introduce new cryptographic primitives without modifying application code or backend services. This centralized control is critical, as PQC adoption will not be a simple “swap” of algorithms, but a gradual transition spanning years.
In addition, ADCs already sit in front of diverse environments - legacy applications, modern microservices, on-prem systems, and multiple clouds. This makes them a natural mediation layer for handling the coexistence of classical and postquantum cryptography during the transition period.
Why Post Quantum Capabilities at the ADC Matter
Protecting Long-Term Confidentiality
Many encrypted sessions today carry data that must remain confidential for years or even decades, including customer PII, healthcare records, financial data, intellectual property, and contractual information. Even if a quantum computer cannot break current encryption immediately, the risk of “harvest now, decrypt later” remains real.
Introducing postquantum or hybrid key exchange at the application edge significantly reduces the long-term exposure window for such data, helping organizations protect information well beyond the lifespan of today’s cryptographic algorithms.
Preserving Trust and Authentication
Quantum computing also threatens digital signatures and authentication mechanisms. Once classical signature schemes become vulnerable, attackers could potentially forge certificates or impersonate trusted entities, undermining foundational trust models.
As an enforcement point for authentication and certificate trust, the ADC plays a critical role in maintaining secure trust boundaries as cryptographic standards evolve. Supporting post quantum or hybrid mechanisms at this layer helps ensure continuity of trust during and after the transition.
Enabling Crypto-Agility
Replacing cryptography across an enterprise is complex, risky, and rarely fast. Crypto-agility, the ability to evolve cryptographic algorithms and policies without disruptive architectural changes, is therefore essential.
As a centralized point for managing cryptographic policy, ADCs enable hybrid modes and observe encrypted traffic behavior. This allows organizations to introduce PQC incrementally, test safely, and adapt quickly as standards and best practices mature.
Addressing Compliance, Risk, and Trust Expectations
As awareness of quantum risk grows, post quantum readiness is increasingly entering regulatory, contractual, and industry discussions, particularly in sectors such as finance, healthcare, government, and critical infrastructure.
Beyond formal compliance, there is also a long-term brand and trust dimension. If sensitive data is compromised years from now because organizations failed to prepare when the risk was already understood, that failure will be difficult to justify to customers and stakeholders.
Supporting Hybrid and Backward Compatible Environments
The transition to post quantum cryptography will be gradual. Not all clients, browsers, devices, or backend systems will support PQC at the same pace. For the foreseeable future, organizations will operate in mixed environments that combine classical and post quantum capabilities.
ADCs can help manage this complexity by supporting hybrid cryptographic approaches, negotiating the strongest mutually supported options, and maintaining compatibility, all while preserving application availability and performance.
How Radware Alteon Helps Organizations Prepare
Radware is adding post quantum cryptography capabilities to Alteon with a clear objective: to help organizations begin their PQC journey safely, incrementally, and operationally.
By integrating post quantum and hybrid cryptographic support into the ADC layer, Alteon enables customers to:
- Introduce quantum-resistant key exchange without rearchitecting applications
- Manage cryptographic policies centrally across environments
- Support hybrid deployments that balance security, performance, and compatibility
- Build long-term crypt agility aligned with evolving standards and industry guidance
Rather than treating PQC as a onetime switch, Alteon is designed to support a phased, real world transition that reflects the operational realities of modern enterprises.
From Readiness to Execution
Post quantum cryptography is no longer just a theoretical discussion. As outlined in our previous blog, preparation must begin well before quantum computers become practical.
By starting at the application edge, where cryptographic policy becomes operational reality, organizations can move from strategic awareness to concrete action. ADCs provide a natural foundation for that journey, and the upcoming postquantum capabilities in Radware Alteon helps make it possible. Organizations can move from awareness to action, testing hybrid cryptography, building crypto-agility, and preparing their application infrastructure for what comes next.
Engage with Radware to learn how Alteon can help you start your postquantum transition, on your terms and on your timeline.