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Why 2029 changes the post-quantum conversation

For years, quantum threats were treated as a distant cybersecurity concern: important, but comfortably far away. However, that assumption is changing rapidly.

Google’s recent announcement targeting 2029 for post-quantum cryptography (PQC) readiness did more than set an internal migration goal. It shifted the entire industry conversation.

The question is no longer whether quantum computing will eventually impact traditional cryptography – but it has become: “How much time do organizations realistically have left to prepare?”

From “Someday” to Strategic Urgency

In the mid-2010s, most experts believed cryptographically relevant quantum computers capable of breaking RSA and ECC encryption were still decades away.

At the time:

  • hardware capabilities were extremely limited,
  • quantum error correction appeared prohibitively expensive,
  • and breaking RSA-2048 was estimated to require nearly one billion physical qubits.

As a result, many organizations viewed post-quantum migration as a long-term issue. But the timeline has steadily compressed.

Research breakthroughs over the past decade have dramatically reduced the estimated quantum resources needed to break today’s public-key cryptography. The turning point came in 2019, when Google researcher Craig Gidney and Martin Ekerå demonstrated that RSA-2048 could theoretically be broken using approximately 20 million noisy qubits – a 50x reduction from previous estimates. Since then, the acceleration has continued.

New approaches in:

  • quantum factoring algorithms,
  • lattice optimization,
  • logical qubit resilience,
  • and error-correction architectures

have continued shrinking the gap between theory and operational feasibility.

By 2026, some research estimates suggest that breaking RSA-2048 may require as few as tens of thousands of qubits under certain architectures. Whether those timelines ultimately materialize exactly as predicted is almost secondary. What matters is this: The margin for inaction is disappearing.

Why Google’s 2029 Target Matters

Google’s 2029 target is significant not simply because of the date itself, but because of what it signals. Large-scale cryptographic migration is extraordinarily complex.

Organizations must first:

  • identify where cryptography is used,
  • inventory certificates and trust relationships,
  • modernize PKI infrastructures,
  • implement crypto-agility,
  • validate vendor compatibility,
  • and redesign authentication and identity trust chains.

This process can take many years, especially across large enterprise ecosystems. Google’s message effectively acknowledges that organizations cannot wait until the arrival of a cryptographically relevant quantum computer before acting. By then, migration may already be too late.

The Immediate Risk: “Harvest Now, Decrypt Later”

One of the most important shifts in the cybersecurity conversation is the rise of the “harvest now, decrypt later” threat model. Attackers do not need quantum computers today to create future risk.

Sensitive encrypted data can already be:

  • intercepted,
  • copied,
  • stored,
  • and archived

with the expectation that future quantum capabilities may eventually decrypt it.

This is particularly concerning for:

  • identity infrastructures,
  • authentication systems,
  • government records,
  • financial data,
  • healthcare information,
  • intellectual property,
  • and any long-retention sensitive information.

For organizations protecting long-lived trust relationships, the threat is already operational, even before Q-Day officially arrives.

Why Identity Systems Are at the Center of the Transition

Much of the post-quantum conversation initially focused on encryption. But increasingly, industry leaders are recognizing that the deeper challenge is trust itself.

Digital identities, certificates, signatures, authentication protocols, and PKI infrastructures form the backbone of modern enterprise security.

If these trust mechanisms become vulnerable:

  • identities can be forged,
  • software signatures can be compromised,
  • secure communications lose integrity,
  • and entire authentication ecosystems become exposed.

This is why post-quantum readiness is fundamentally an identity and trust challenge, not only a cryptographic one.

The Rise of Crypto-Agility

One concept now dominating the post-quantum transition is crypto-agility. Organizations can no longer assume cryptographic standards will remain static for decades.

Future-ready infrastructures must be designed to adapt rapidly, replace algorithms efficiently, and evolve without requiring full architectural redesigns.

The organizations that navigate the quantum transition successfully will likely not be those that deploy first, but those that become adaptable first.

Preparing Before the Deadline

No one can predict the exact arrival date of Q-Day. Some forecasts remain conservative while others anticipate a much faster acceleration. But across governments, standards bodies, hyperscalers, and cybersecurity leaders, one message is increasingly consistent: Waiting for certainty is no longer a strategy.

The transition to post-quantum security is already underway. And for organizations managing identity, trust, and critical infrastructure, preparation must begin long before quantum disruption becomes operational reality.

At MAYI ID, we believe post-quantum readiness is not about fear or speculation. It is about building resilient, crypto-agile trust infrastructures capable of adapting to the next era of cybersecurity. Because the organizations that prepare early will not only reduce risk and they will preserve trust in a rapidly changing digital world.