Why Current Cybersecurity is Vulnerable
Almost all digital communication – from banking transactions and email to digital ID systems – is built on cryptography that fundamentally relies on the difficulty of factoring large prime numbers or solving “the discrete logarithm problem.” RSA and Elliptic Curve Cryptography (ECC) have for decades formed the backbone of Public Key Infrastructure (PKI). A classical computer would need thousands of years to break these algorithms – but with a sufficiently powerful quantum computer, the same problems could one day be solved in minutes.
That means the foundation of our digital trust may lose its strength. And while quantum computers have not yet reached this capacity, we know that they will.
“Harvest Now, Decrypt Later” – Why the Threat is Already Here
One of the most misunderstood aspects of the discussion is the time dimension. It’s easy to dismiss quantum computers as a problem for the next decade. But cyber actors have already adapted. Through the strategy of harvest now, decrypt later, encrypted information is collected today, with the intent of decrypting it in the future once the technology makes it possible. This means that long-lived data – such as medical records, research results, intellectual property, and sensitive communications – is already at risk.
In other words: even if Q-day – the day when quantum computers can practically break today’s encryption – is still ten, fifteen, or twenty years away, the threat is already here. The data being recorded now could become a goldmine for future attacks.
Regulatory Initiatives That Change the Game
The global regulatory responses underline the seriousness. The U.S. Quantum Cybersecurity Preparedness Act requires federal agencies to begin the transition to post-quantum cryptography. NIST, after eight years of work, has introduced four new quantum-resistant algorithms (three for digital signatures and one for key exchange/encryption), which are already being validated and implemented into international standards.
The EU has published a joint policy roadmap – as part of its broader cybersecurity strategy and tied to the NIS2 directive – mandating that critical infrastructure and high-risk data should be migrated by 2030. Meanwhile, the UK’s NCSC has developed detailed timelines making it clear that organizations must begin their preparations now to avoid falling behind.
The message is clear: the transition is not optional. It will be driven by regulatory requirements, and organizations that fail to prepare risk both legal and business consequences.
The Practical Challenges – More Than a Technical Update
Changing encryption algorithms may sound simple in theory, but in practice it represents one of the largest technological shifts organizations have ever faced. Encryption is embedded in everything from business-critical applications and operating systems to cloud platforms, APIs, and supply chains.
The transition will therefore be a multi-year project that touches the entire ecosystem. Performance issues arise when new algorithms with longer keys are implemented. Legacy systems may lack support for updated libraries. During the migration period, hybrid solutions where classical and quantum-resistant methods coexist are often required. And even quantum-safe algorithms are not immune to threats – implementation flaws or side-channel attacks can create new risks.
This is precisely why cybersecurity experts speak of the need for crypto-agility: the ability to rapidly switch algorithms when standards change or new vulnerabilities are discovered. It is no longer about finding a “final” solution, but about building systems prepared for continuous adaptation.
What This Means for Decision-Makers
For CIOs, CSCOs, and CTOs, this brings a new strategic responsibility. The issue of quantum computing and cybersecurity cannot be handled solely by technical teams – it belongs on the executive agenda. Investments in digitalization, cloud migration, and data management risk being undermined if the cryptographic foundation collapses.
The decisions made today will determine how well an organization is prepared when quantum computers reach practical capacity. Waiting until the threat is here is not an option – because by then, it will already be too late. The data that should have been protected will already be exposed.
The Road Ahead
Preparing for the quantum era must increasingly become an integral part of how companies and societies protect their trust capital, intellectual property, and business models.
It requires risk assessments to understand which data is most vulnerable and has the longest lifespan. It requires planning and budgeting for a migration that will stretch over years. And it requires close collaboration between technology leadership, business operations, and regulatory requirements.
At HiQ, we see that companies who start preparing early not only reduce their risks – they also strengthen their position in a market where trust and cybersecurity are becoming key differentiators. Get in touch with us and we’ll tell you more.
