quantum technology: the biggest security challenge of the future?

The supercomputer of the future will be able to process larger amounts of data than ever before. This will challenge the encryption systems on which all our digital security depends. What do we do if a supercomputer attacks us? The answer can be found in Israel.

Quantum computing is no longer a distant vision. Once realized, it will solve problems beyond the reach of classical computers in seconds - transforming AI, medicine, materials science, and energy. Research led by the Niels Bohr Institute at the University of Copenhagen, in collaboration with international partners including the Weizmann Institute, shows that such machines are achievable.

However, quantum computers will break current encryption systems based on large-number factoring, threatening personal data, business secrets, national intelligence, and critical infrastructure. This makes post-quantum cryptography essential. U.S. authorities such as the NSA and NIST already recommend transitioning to quantum-resistant algorithms.

Israel has acted early. Since launching a national cyber strategy in 2011, it has built a strong cybersecurity ecosystem involving academia, government, and elite military technology programs. It is now investing heavily in quantum security, establishing research centres and funding initiatives, including dedicated national programs and task forces.

Although Denmark is ahead in quantum research, Israel has stronger experience in civil cybersecurity implementation. A Danish-Israeli partnership would combine Denmark’s quantum leadership with Israel’s cybersecurity expertise. As global competition intensifies - supported by major EU investments - the launch of a practical quantum computer is a matter of time. Denmark must prioritize quantum security now to remain competitive and secure.