We know that CISOs, CSOs, CIOs, and Chief Risk Officers in financial services, healthcare, are working on the practicalities: a threat model, a timeline, and a checklist. Because when a cryptographically relevant quantum computer arrives, it threatens to both disrupt your business model but potentially break the foundational mathematics holding your existing digital trust together.
The most common misconception about the quantum threat is that it only matters once the hardware is fully realised. This is a dangerous misunderstanding of how malicious actors operate.
State-sponsored groups and sophisticated syndicates are actively engaged in HNDL: Harvest Now, Decrypt Later.
They are intercepting and storing high-value, heavily encrypted traffic from financial institutions, healthcare registries, and public sector networks right now. While they cannot read it today, they know that a quantum machine running Shor’s algorithm will unravel standard asymmetric encryption (RSA and ECC) in seconds.
If you are protecting health records, national security data, or financial instruments, your data is already vulnerable. The breach has effectively happened; the adversary is simply waiting for the decryption key to be built.
This is no longer a theoretical exercise for the future. Over the last few years, global regulators and governments have moved from issuing warnings to codifying strict, mandatory timelines for Post-Quantum Cryptography (PQC) migration:
If your software services plug into state infrastructure, banking networks, or public health systems, PQC compliance is rapidly becoming a non-negotiable procurement baseline.
Historically, changing an encryption algorithm meant a multi-year re-engineering project because keys and algorithms were hardcoded deep within legacy application code. If your software requires a complete rewrite every time an algorithm is compromised, your architecture is fundamentally flawed.
The solution is cryptographic agility. This is building software where the underlying cryptographic layers are completely abstracted from the application logic. If an algorithm fails, you should be able to swap it out via configuration changes, not a code overhaul.
To achieve this, defensive teams, penetration testers, and security architects must shift their focus to three immediate pillars:
You are only as secure as your third-party dependencies. If you run penetration testing or continuous validation, shift the focus toward your vendors. Seek a Software Bill of Materials (SBOM) that specifically highlights the cryptographic protocols used by your SaaS providers, cloud vendors, and API integrations.
Quantum-resistant algorithms (like ML-KEM or ML-DSA) use significantly larger key sizes and require more processing power to execute handshakes. When your teams conduct load and DDoS testing, you must simulate the computational overhead of PQC handshakes. Larger keys mean more data over the wire and higher CPU utilization during TLS negotiations. If your firewalls or API gateways are not tuned for this increased stress, your own quantum-safe defense could become the bottleneck that brings your services down.
At Marino Software, we help organisations in highly regulated environments to map their technical risk to actual business realities. Before you invest in expensive, unproven quantum tools, you need a baseline understanding of where your current software stands.
An Application Agility Audit is the foundational step. We work alongside your internal security and engineering teams to:
We are doing this already with several clients. ready to future-proof your systems against the post-quantum shift? Contact us today to schedule an Application Agility Audit.
Have a project in mind, or just starting to think one through? We’re good at both.
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