The unstoppable advance of quantum computing has put the foundations of traditional cryptography in check. Algorithms such as RSA and ECC, which for decades have protected our digital communications, could be vulnerable in a horizon of 10 to 20 years, in what experts call 'Q-Day'. This scenario is not mere speculation: there are already 'harvest now, decrypt later' (HNDL) attacks that store encrypted data in the hope of decrypting it when quantum power allows. In the face of this threat, post-quantum encryption (PQE) emerges as the solution of the future, and some VPNs already offer it as an activatable feature. But is it really necessary for all users or only for critical environments? In this article we analyse the current state of this technology, its practical implementation and the value it brings to companies and professionals.
Post-quantum encryption is based on mathematical problems that even quantum computers find extremely complex. In August 2024, NIST standardized three algorithms: ML-KEM (Kyber) for key exchange, and ML-DSA and SLH-DSA for digital signatures. These protocols are integrated into VPNs at the handshake level, ensuring that the encryption keys cannot be decrypted by a quantum-capable attacker. Providers such as NordVPN, ExpressVPN, and Mullvad already allow you to activate this protection, albeit with certain protocol limitations (e.g., it requires using WireGuard or Lightway instead of OpenVPN). Activation is simple and does not significantly degrade performance in real tests, so there is no technical reason to disable it if the vendor supports it.
However, the key question is whether it is worth adopting PQE today. For a home user who browses social media and consumes streaming content, that's probably an unnecessary precaution. But for companies that handle sensitive data — financial, healthcare, intellectual property, or classified information — the risk of HNDL is real, and the consequences can be devastating. Imagine that a competitor or malicious actor accumulates your organization's encrypted traffic for years; The day quantum computing becomes viable, that historical archive could reveal trade secrets, strategies, or customer data. Therein lies the importance of getting ahead.
For companies, the transition to post-quantum cryptography isn't just a matter of flipping a button on a VPN. It involves reviewing the entire security infrastructure: from user authentication to digital document signing, including connections between servers and APIs. This is where the expertise of companies such as Q2BSTUDIO, which specialises in cybersecurity and custom software development, comes into play. A comprehensive approach allows not only to implement PQE in communications, but also to audit existing systems, update protocols, and build internal teams. Quantum security is not an add-on, but a layer that must be integrated from the design.
In addition to cybersecurity, organizations need to adapt their applications and processes to an increasingly complex digital environment. Q2BSTUDIO offers bespoke applications that can incorporate post-quantum encryption from the development phase, ensuring that data is protected throughout its lifecycle. We also work with artificial intelligence for companies, such as AI agents that automate security tasks, or business intelligence services with Power BI that help visualize threats in real time. The combination of custom software, cybersecurity and cloud (both AWS and Azure cloud services and hybrid environments) allows us to build resilient architectures against the quantum future.
From a business perspective, the decision to adopt PQE today must be based on a risk analysis. Not all industries have the same exposure profile. Sectors such as banking, health, defense or advanced technology should prioritize its implementation. Conversely, SMBs with low-value data can wait for the technology to mature and costs to fall. However, even in these cases, any digital transformation project that contemplates cloud or process automation should consider quantum cryptography as a non-functional requirement in the long term.
Another relevant aspect is training and awareness. Many IT managers are unaware that their current VPN connections can be intercepted and stored. Including PQE in the security policy is a proactive measure that demonstrates technological maturity. In addition, regulators will start requiring post-quantum standards in the coming years, especially in data protection regulations such as the GDPR. Anticipating can avoid costly urgent migrations.
At Q2BSTUDIO we accompany companies on this path. Our services range from cybersecurity consulting to the implementation of complete business intelligence solutions, including the development of AI agents that monitor and respond to incidents. The integration of tools such as Power BI allows managers to have dashboards with quantum security indicators, and our cloud engineering teams deploy infrastructures on AWS and Azure with state-of-the-art encryption. All this with a practical and measurable approach.
In conclusion, post-quantum encryption in VPN is a functionality that is already available and, although it is not essential for everyone, it represents a significant advance in data protection against future threats. Companies that operate with sensitive information should activate it without delay and, more importantly, review their global security architecture with the help of experts. The quantum future is not a distant dystopia; it is built every day with informed technological decisions. And in that process, having a partner like Q2BSTUDIO makes the difference between waiting for danger to arrive or being prepared for when it does.
