Quantum computing is no longer a distant concept. Its potential to undermine widely used encryption standards presents a tangible risk to data confidentiality, integrity, and regulatory compliance.
For cybersecurity and GRC leaders, preparing for this shift means reassessing cryptographic resilience not just for future systems, but for data already stored and secured under today’s standards. For example, quantum algorithms like Shor’s can exponentially accelerate decryption, exposing a critical weakness in current defences.
| Type | Example | Quantum Risk |
|---|---|---|
| Asymmetric | RSA, ECC | High - broken by Shor's algorithm |
| Symmetric | AES-256 | Moderate - Grover's algorithm halves effective key strength |
| Post-Quantum | Kyber (FIPS 203) | Low - designed to resist post quantum attacks |
Note: AES-256 remains strong and viable but relying on it alone may not meet long-term resilience or regulatory expectations.
Industry Signals: Quantum-Resistant Encryption in Practice
The transition to post-quantum cryptography is already underway:
- Google Cloud has introduced quantum-resistant encryption into its key management services, helping organisations protect sensitive data from future decryption risks even if attackers steal it today.
- Mastercard is urging banks and financial services firms to upgrade their encryption methods now to avoid being caught off guard when quantum computers become powerful enough to break current protections.
Strategic Response
Quantum threats are not just a technical concern they’re a governance and compliance issue. UK/EU regulations already require forward-looking risk management:
- GDPR Article 32 mandates “appropriate technical and organisational measures” to ensure data security including anticipating future vulnerabilities.
- DORA and NIS2 emphasise resilience against emerging threats, even those not yet fully realised.
- Data encrypted today may be vulnerable tomorrow if it relies on algorithms that quantum computing could break.
Organisations should begin
- Auditing cryptographic assets to identify vulnerable algorithms.
- Planning migration paths to quantum-safe alternatives.
- Embedding quantum readiness into broader cyber resilience strategies.
Looking Ahead
Contact ServQual team to explore how your organisation can strengthen cryptographic visibility and prepare for the quantum era.
"You can’t see the quantum risks yet, but you need to prepare and research to keep your digital assets secure.”
Dara Sturgeon
Security Success Manager | ServQual
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