The Future of Cybersecurity: A Clear Introduction.
Level 1: Post-Quantum Foundations
In a nutshell
Current digital security relies on mathematical puzzles that today's computers can't solve. Quantum computers work differently—exploring millions of possibilities at once—which means our current "puzzles" are about to become easy to crack.
Why
Why should you care?
1
Your Digital Identity is at Risk
Banking apps, digital signatures, and public services all rely on the cryptography that quantum computers could eventually break.
2
The "Harvest Now, Decrypt Later" Threat
Attackers are already stealing encrypted data today, planning to unlock it once powerful quantum computers are available.
3
Long-Term Privacy
Medical records, legal files, and government documents need security that lasts for decades, not just months.
How
How POSEIDON Supports Protection
The POSEIDON project contributes to building a "Quantum-Safe" Europe. We focus on:
Digital Identity
Ensuring you can always prove who you are securely.
Hybrid Security
Using the best of today’s and tomorrow’s tech together
Crypto-Agility
Building systems that can update their locks automatically as technology changes.
Learn more
Read the Full Article
Dive into the mechanics of quantum computing and discover how we are securing the European digital economy.
This introduction is designed for everyone—from curious citizens and students to business owners who need a high-level overview of why the digital landscape is changing. No prior technical or cryptographic knowledge is required. If you want to understand the "Why" behind the POSEIDON project and how quantum computing affects your daily privacy, this is the right place to start.
Looking for more technical depth?
If you already understand the basics of quantum threats and are looking for specific information regarding IT migration timelines, regulatory compliance (NIS2/DORA), and organisational strategy, you may find our intermediate resources more valuable.
If you are interested in deepening your knowledge of the topics covered at this level, we have gathered a collection of curated external resources—including official standards, research papers, and educational guides—to support your journey.
Quantum and supercomputing — Fact page
What quantum tech is, and why it changes what computers can do.
