How Q-Day and Security Demands Are Fuelling Cloud Modernisation

The rise of quantum computing is driving the need for cloud modernisation. ‘Q-Day,’ the point at which quantum technology can break current encryption methods in minutes, is looming. With capable quantum systems expected by 2030 and the potential to create value worth trillions of dollars within the next decade, businesses must act now to modernise IT infrastructure and prepare for emerging security challenges.  

Those that fail to adapt risk leaving themselves vulnerable to advanced cyberattacks while also falling behind in innovation. Preparing for this challenge requires a strategic approach to modernising IT infrastructure, which includes cloud adoption. 

Quantum computing: Both a threat and a catalyst for change 

Quantum computing is both a risk and opportunity for businesses. It’s pushing organisations to adopt cloud technologies not just to defend against emerging threats, but also to unlock new access to security innovation from cloud providers. By moving to the cloud, businesses gain access to tools such as real-time threat detection, automated security updates, and advanced encryption methods. These capabilities help mitigate today’s risks while preparing for the challenges of a quantum-powered future. 

Legacy IT systems, on the other hand, often tie businesses to outdated processes and weaker security measures, significantly increasing the risk of breaches and downtime. Think back to the 2017 NotPetya attack, which exploited vulnerabilities in on-premises systems. The attack had huge implications for businesses – from large corporations to government agencies – leading to widespread operational disruptions.  

Cloud platforms provide an alternative by offering scalable resources and enabling faster deployment of updates to stay ahead of both cyber threats and regulatory demands.  Features like AI-powered threat detection help identify and address risks in near real-time, reducing the likelihood of successful attacks.  

Preparing for Q-Day: Embracing practical quantum-resistant strategies 

Now is the time for organisations to prepare for the impact of quantum technology. One consideration is adopting quantum-resistant encryption algorithms, such as NIST’s CRYSTALS. Developed to protect data from quantum attack, CRYSTALS includes algorithms for both general encryption and digital signatures. For example, CRYSTALS-Kyber is designed for secure data exchanges, offering the advantage of smaller encryption keys that are both efficient and fast. These algorithms provide practical, scalable solutions that businesses can implement today to secure their systems against future threats.  

Cloud service providers simplify the deployment of these protections, allowing organisations to manage encryption across complex environments more effectively. Some businesses are already adopting layered approaches, using both current encryption methods and experimental quantum-resistant technologies to build resilience.  

While quantum cryptography holds promise for secure key distribution, it remains complex and resource intensive. For most organisations, focusing on scalable, quantum-resistant measures through cloud adoption offers a more achievable and immediate solution to preparing for Q-Day. 

Modernising security and fostering innovation 

Delaying cloud adoption increases cyber risks while limiting an organisation’s ability to stay ahead of emerging threats. Legacy systems create vulnerabilities and technical debt, making security updates and regulatory compliance more challenging. Modernising through cloud platforms strengthens security by introducing advanced features such as quantum-resistant encryption, multi-factor authentication, and real-time monitoring underpinned by fully-automated operations. 

The time to prepare is now 

The challenges posed by quantum computing and modern cyber threats demand a proactive approach. Migrating to the cloud is more than a technical upgrade—it is a strategic move that secures data, streamlines operations, and positions businesses for long-term growth. 

Organisations that modernise their IT infrastructure now will not only protect themselves against Q-Day but also build a foundation for continuous improvement and innovation in an increasingly complex technological landscape. 

By Eamonn O’Neill, co-founder and Chief Technical Officer at Lemongrass