Quantum Computing and Cybersecurity

The Next Strategic Threat Every Organization Must Understand Today

What Is Quantum Computing? A Practical Explanation

Traditional computers operate using bits (0 or 1).
Quantum computers, on the other hand, use qubits — units of information that can exist in multiple states simultaneously.

Three core principles enable their power:

• Superposition – the ability to process multiple possibilities at once

• Entanglement – instantaneous correlation between qubits

• Interference – amplification of correct outcomes and suppression of incorrect ones

The result is a computational capability that far exceeds classical systems for certain types of problems

Why It Matters for Businesses

Quantum computing is not simply a “faster computer.” It excels at solving specific classes of problems:

• Optimization (logistics, finance)

• Simulations (pharmaceuticals, materials science)

• Artificial intelligence and machine learning

• And most critically — cryptography

This last point is where the real disruption lies.

Global Status (2025–2026)

The field has rapidly transitioned from theoretical research to global competition:

• Over $10 billion in government investments

• Market projected to reach $20 billion by 2030

• Significant shortage of skilled professionals

• Dramatic valuation increases in quantum-focused companies

Key Industry Players

• Google – breakthroughs in error correction

• IBM – targeting Quantum Advantage by 2026

• Microsoft – advancing topological qubits

• Amazon – integrating quantum into cloud services

• IonQ – aiming for millions of qubits

The takeaway: this is a strategic, global race with technological and geopolitical implications.

The Real Threat: Cryptography

Modern cybersecurity relies on one fundamental assumption:
Certain mathematical problems are extremely difficult to solve.

Quantum computing challenges that assumption.

What Breaks?

• RSA

• ECC (Elliptic Curve Cryptography)

• Diffie-Hellman

• TLS/HTTPS

• VPN and SSH

All of these are expected to become vulnerable once sufficiently powerful quantum computers emerge

Why?

Shor’s Algorithm enables rapid factorization of large numbers — effectively undermining the foundation of asymmetric encryption.

The Threat That Already Exists: “Harvest Now, Decrypt Later”

This is not a future risk — it is already happening.

Threat actors are:

• Collecting encrypted data today

• Storing it for future use

• Waiting for quantum capabilities to decrypt it

The business implications are severe:

• Intellectual property

• Customer data

• Financial records

• Confidential communications

All may be exposed in the future, even if they are secure today

What Remains Secure?

Not everything is at risk:

• AES-256 is currently considered resistant to quantum attacks

• Symmetric encryption remains viable

However, architectural changes and forward planning are required.

The Global Response: Post-Quantum Cryptography (PQC)

The world is not standing still.

The U.S. National Institute of Standards and Technology (NIST) has already published new cryptographic standards:

• ML-KEM (encryption / key exchange)

• ML-DSA (digital signatures)

• SLH-DSA (backup signatures)

Clear guidance:
Organizations should begin transitioning now

Regulatory Implications

• By 2035 – vulnerable algorithms will be deprecated

• Critical systems will transition earlier

• Governments are already mandating PQC adoption

Additionally:

• Major cloud providers have begun implementing PQC

• A growing percentage of global traffic is already protected

What Organizations Should Do

Phase 1 — Immediate

• Conduct a full cryptographic inventory

• Identify long-term sensitive data

• Assess dependencies on vendors and cloud services

Phase 2 — 2026–2027

• Transition to PQC-enabled TLS

• Upgrade VPN solutions

• Update code signing mechanisms

• Include PQC requirements in vendor contracts

Phase 3 — 2027–2030

• Rebuild PKI infrastructure

• Combine Zero Trust with PQC

• Re-encrypt critical data

Business Priorities

Conclusion

Quantum computing is not a trend — it is a paradigm shift in both computing and cybersecurity.

Organizations that act early will:

• Reduce long-term risk

• Optimize future costs

• Meet upcoming regulatory requirements

Those that delay may face significant exposure.