Quantum Computing Will Break Today’s Encryption — And Most Organizations Are Not Preparing for the Transition

CEO Strategic Leadership Series

Telecom and IT

Quantum computing is no longer theoretical. Government agencies, banks, defence contractors, telecoms, and hyperscalers are already preparing for a world where today’s encryption becomes breakable.

The threat is known as “harvest now, decrypt later.”
Adversaries steal encrypted data today, store it, and wait for quantum machines to catch up.

When quantum capability reaches a critical threshold, all stolen data — medical records, financial files, trade secrets, credentials — becomes readable.

Most companies are unprepared.
Typical gaps include:
• No PQC (post-quantum cryptography) roadmap
• Un-inventoried encrypted assets
• Outdated protocols (TLS 1.2, RSA, ECC)
• Hard-coded cryptography in legacy systems
• Vendor products without PQC timelines

Organizations need a multi-year transition plan — starting now.

Key actions:
• Enterprise-wide crypto inventory
• Prioritization of high-risk assets
• Migration to PQC-ready algorithms
• Vendor contract requirements for PQC compliance
• Hybrid classical + quantum-safe encryption
• Incident response updates for quantum-enabled threats

This is the most important cryptographic shift in 40 years.

How Arcus Can Help

Arcus builds quantum-risk roadmaps, inventories encryption assets, and designs enterprise transition plans for post-quantum security.

Next step: Request an Arcus Quantum Security Preparedness Review.

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Below is a sample of the range of services that Arcus has provided to clients.

  • A survey of 2,350 consumers and 1,320 business leaders for feedback on sustainability trends
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  • Creating a new sales deployment model for a healthcare company
  • Developing a position evaluation and compensation model for a professional medical association   
  • Improving services to customer segments by deepening their understanding of customer attitudes

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