Quantum computing and cybersecurity: how to prepare for the post-RSA era
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Quantum computing is no longer a distant innovation, it’s a disruptive force already reshaping digital security. With quantum algorithms capable of solving complex mathematical problems in seconds, traditional encryption methods like RSA and ECC (elliptic curve cryptography) are becoming increasingly vulnerable.
By 2025, cybersecurity threats tied to quantum computing are no longer theoretical. According to the National Institute of Standards and Technology (NIST), the first real-world quantum attacks could occur before 2030, placing sensitive data from governments, enterprises, and users at risk. This rising quantum threat is accelerating demand for quantum-safe encryption and quantum-resistant cryptography.
Why does Quantum Computing threaten existing encryption?
Current encryption protocols rely on problems that are computationally infeasible for classical computers—such as factoring large prime numbers (RSA) or solving discrete logarithms (ECC). However, quantum computers running Shor’s algorithm can break these problems in polynomial time, effectively bypassing traditional data encryption and threatening the privacy of digital communications, financial transactions, and digital certificates.
Quantum threats across critical sectors
Several sectors face growing exposure to quantum computing security risks:
- Banking and finance: A single Quantum algorithm could compromise cryptocurrency wallets or intercept SWIFT transactions.
- Healthcare: Medical records encrypted with legacy algorithms like RSA may be exposed.
- Critical infrastructure: SCADA systems in energy and transportation could be breached by quantum-enabled adversaries.
Post-Quantum cryptography: preparing for the “Quantum Apocalypse”
Post-quantum cryptography standards (PQC) include cryptographic algorithms designed to withstand attacks from quantum machines. NIST leads the development of NIST PQC standards, classifying them into four main categories:
- Lattice-based (e.g., ML-KEM, FIPS 203): Built on complex mathematical structures in multidimensional lattices.
- Hash-based (e.g., SLH-DSA, FIPS 205): Leveraging one-way cryptographic functions.
- Code-based (e.g., HQC): Utilizing coding theory for secure obfuscation.
- Multivariate: Based on systems of nonlinear polynomial equations.
These standards are vital to the future of encryption and the development of quantum-resistant encryption systems.
Key cybersecurity trends in 2025
1. Cryptoagility for future-proof security
Cryptoagility refers to the ability to upgrade cryptographic algorithms without overhauling the entire infrastructure. At TU Quantum Encryption, we’re already implementing agile frameworks that allow seamless migration from RSA to quantum-safe security protocols like CRYSTALS-Kyber.
2. Critical asset inventory and risk assessment
Leading organizations are conducting audits to locate vulnerable cryptographic deployments. One European bank identified over 1,200 systems using RSA-2048 and prioritized their migration to post-quantum cybersecurity protocols.
3. Hybrid cryptographic solutions
Hybrid encryption—combining classical and quantum-resistant algorithms—has emerged as a practical transition model. In 2024, Stormshield demonstrated a 70% reduction in quantum exposure using hybrid schemes.
4. Quantum key distribution (QKD)
While promising, quantum key distribution faces practical limitations such as the need for dedicated optical fiber and lack of built-in authentication. For now, its use is mainly restricted to high-security government networks.
Immediate steps for CISOs and security leaders
- Risk Evaluation: Identify data assets with a lifespan of 10+ years, such as trade secrets or critical infrastructure configurations.
- Pilot Testing: Implement PQC within non-critical environments. Spanish firm Redtrust cut migration time by 40% using sandbox environments.
- Training and Awareness: Qccording to Gartner (2024), 68% of CISOs admit limited knowledge of PQC implications—underscoring the need for education in CISO security strategy.
- Vendor Collaboration: Confirm that tech providers have aligned roadmaps to support quantum resilience and zero trust architecture.
TU Quantum Encryption: a Quantum-safe future
TU Quantum Encryption delivers a low-latency, quantum-safe encryption solution for organizations demanding elevated data protection for sensitive communications and infrastructure.
Case highlights:
- Halotech & Kite: By embedding quantum encryption into Kite’s platform, secure communication is enabled between helmets and wearables used in special operations—protected by quantum cryptography.
- Subsea Mechatronics & XRF: With Quantum-Safe Networks over a private 5G infrastructure, sensitive data between ROV systems and control platforms is transmitted with added post-quantum layers—ensuring low-latency, high-integrity communication.
A strategic Imperative, not a choice
NIST has set 2030 as the deadline to retire RSA and ECC from critical systems. Yet the “harvest now, decrypt later” approach already in play demands immediate action. Adopting quantum-resistant cryptography isn’t optional—it’s a foundational component of next-gen security.
As Pierre-Yves Hentzen, CEO of Stormshield, warns: “The post-quantum transition is the Y2K of this generation—but with higher stakes. Those who fail won’t just lose money—they’ll lose trust.”
At TU, we’re committed to leading the charge in developing resilient quantum technologies—because in the era of quantum computing, security must remain a constant priority.
Soy redactor publicitario y llevo más de 15 años creando contenidos sobre creatividad y tecnología. Muy fan de las redes sociales, la inteligencia artificial y el cine indie.
