A major financial institution encrypted a merger agreement in 2019. The encryption was state-of-the-art RSA-2048. The key was properly managed. The implementation followed best practices. Security auditors signed off. Compliance teams approved.

The encrypted file was transmitted over TLS, stored in an encrypted database, and backed up to encrypted archives. Every security control worked perfectly.

An attacker intercepted that encrypted transmission in 2019. They stored it. They're still storing it.

They can't decrypt it today. But in 2032, when quantum computers become powerful enough, they'll decrypt it in minutes.

The merger agreement that was confidential in 2019 will become public in 2032. The trade secrets will be exposed. The competitive advantage will evaporate.

And there's nothing the financial institution can do about it now. The data is already captured. The countdown has already started.

This is called "harvest now, decrypt later." And it's not a future threat. It's happening right now to data you encrypted years ago.

After founding a CIAM platform that encrypted authentication data for over a billion users, I thought I understood encryption timelines. Encrypt the data, protect the keys, rotate when necessary, archive securely.

But here's what the quantum threat reveals: encryption has an expiration date that most organizations haven't calculated. And for many datasets, that expiration date has already passed.

Let me show you why the encrypted data you thought was safe is actually a ticking time bomb, and what the global push for post-quantum cryptography in 2026 really means for your organization.

What Actually Happened in 2026 (The Quantum Wake-Up Call)

January 2026 marked a turning point in how governments and industries view quantum security.

Here's what happened:

G7 Declared 2026 "Year of Quantum Security"

On January 13, 2026, the G7 Cyber Expert Group issued a statement on advancing a coordinated roadmap for the transition to post-quantum cryptography in the financial sector.

Key requirements:

• Risk Assessment & Planning must start in 2026 (not "eventually")
• Financial institutions must develop concrete migration timelines
• Coordinated global approach (not individual country initiatives)

This wasn't a suggestion. It was a directive.

European Commission Mandated PQC Plans

On June 23, 2025, the European Commission published its PQC coordinated implementation roadmap with aggressive timelines:

The deadlines:

• December 31, 2026: All Member States must have national PQC transition plans
• 2030: Secure critical infrastructure with post-quantum cryptography
• 2035: Achieve full systemic transition

What this means: Organizations operating in EU don't have a choice. They have a schedule.

NIST Finalized Post-Quantum Standards

In 2024, NIST (National Institute of Standards and Technology) finalized the first set of post-quantum cryptography standards.

The standards cover:

• ML-KEM (Module-Lattice-Based Key Encapsulation Mechanism)
• ML-DSA (Module-Lattice-Based Digital Signature Algorithm)
• SLH-DSA (Stateless Hash-Based Digital Signature Algorithm)
• FN-DSA (FALCON – Fast Fourier Lattice-based Compact Signatures)

These aren't experimental. They're production-ready standards that organizations should be implementing now.

FBI and NIST Coordinating Global Effort

The White House is expected to release executive action mandates on quantum cybersecurity and PQC security in 2026.

The coordination involves:

• FBI (law enforcement and threat intelligence)
• NIST (standards and technical guidance)
• International partners (G7, EU, allied nations)
• Private sector (tech companies, financial institutions)

This is unprecedented coordination around a security threat that hasn't materialized yet.

Why?

Because while quantum computers can't break encryption today, the threat window is already open.

The Math That Should Terrify Every CISO

Security experts use a formula called Mosca's Theorem to determine the urgency of migration to post-quantum cryptography:

X + Y > Z means migration is urgent

Where:

• X = Time required to transition systems to post-quantum cryptography
• Y = Time during which data must remain secure
• Z = Estimated arrival of cryptographically relevant quantum computers (CRQC)

Let's work through real numbers:

For a Typical Enterprise

X (Migration time): 5-10 years

• Inventory cryptographic systems: 6-12 months
• Test post-quantum algorithms: 12-18 months
• Deploy to critical systems: 12-24 months
• Full enterprise rollout: 24-48 months
• Vendor dependencies: Add 12-24 months

Y (Data lifetime): Varies by data type

• Financial records: 7-10 years
• Healthcare data: 20+ years (lifetime)
• Trade secrets: 10-15 years
• Government secrets: 25-50 years
• Mortgage documents: 30 years

Z (Quantum threat timeline): 2030-2035 (conservative estimates)

The calculation:

• X = 10 years (realistic migration timeline)
• Y = 20 years (typical sensitive data lifetime)
• Z = 8 years (2026 to 2034, midpoint estimate)

X + Y = 30 years Z = 8 years

30 > 8

Migration is not just urgent. It's already late.

The Uncomfortable Implication

Any data that must remain confidential for more than 8 years and is encrypted with current standards (RSA, ECC) is already exposed if it can be intercepted today.

Examples:

• 30-year mortgage documents from 2019
• Medical records from patients born in 2020
• Trade secrets for products launching in 2030
• Government communications from current administrations
• Patent applications filed this year

All of this data, if encrypted with RSA or elliptic curve cryptography, has a shelf life shorter than its confidentiality requirements.

When building the CIAM platform that handled encryption for over a billion users, we made decisions about encryption algorithms based on "current best practices."

We never asked: "How long does this data need to stay secret?" vs. "How long will this encryption actually protect it?"

That's the question every organization should be asking now.

How "Harvest Now, Decrypt Later" Actually Works

The attack isn't complicated. It's patient.

Here's how it works:

Step 1: Harvest Everything (Happening Now)

Attackers (nation-states, sophisticated criminal organizations, intelligence agencies) are:

• Intercepting TLS-encrypted web traffic
• Capturing VPN sessions
• Recording encrypted email
• Storing encrypted backups
• Archiving encrypted database transfers
• Collecting any encrypted communication they can access

Cost to store this data: Essentially free

• Cloud storage: $0.01-0.02 per GB per month
• 1 TB of encrypted traffic: $10-20 per month
• Keep it for 10 years: $1,200-2,400 total

For state actors with unlimited budgets, this is trivial.

Step 2: Wait for Quantum Computers (2030-2035 Estimate)

Current quantum computers have about 100-1,000 qubits. They're noisy, error-prone, and can't break cryptography.

Cryptographically relevant quantum computers need:

• Millions of qubits (current: thousands)
• Fault tolerance (current: high error rates)
• Stable operation (current: decoherence problems)

But progress is accelerating:

• IBM targets 100,000-qubit systems by 2033
• Google claims quantum advantage in specific tasks
• PsiQuantum raised billions for million-qubit systems
• China investing heavily in quantum infrastructure

Conservative estimate: 2030-2035 Aggressive estimate: 2028-2032 Optimistic (for defenders) estimate: 2035-2040

Even with the optimistic timeline, data encrypted in 2025 using RSA will be decryptable by 2040. That's within the confidentiality window for most sensitive data.

Step 3: Decrypt at Leisure (Future, But Inevitable)

Once quantum computers reach sufficient capability:

• Run Shor's algorithm on stored encrypted data
• Break RSA and ECC encryption
• Decrypt everything harvested over the past 10-15 years

Time to decrypt RSA-2048 with quantum computer: Minutes to hours Time to decrypt ECC: Similar

This isn't brute force. It's mathematical inevitability.

The encryption that protects data today will be transparently readable in the future. And that future is closer than most organizations think.

Step 4: Exploit the Data

What happens when decades of encrypted data becomes readable?

Intellectual property theft:

• Trade secrets from 2020 inform competitor strategies in 2032
• Proprietary algorithms extracted and replicated
• R&D investments made obsolete by leaked designs

Blackmail and espionage:

• Government communications from 2024 exposed in 2033
• Corporate negotiations revealed years later
• Personal communications used for coercion

Financial fraud:

• Banking credentials extracted from old VPN sessions
• Cryptocurrency private keys recovered
• Account credentials harvested and tested

Legal and regulatory:

• Privileged attorney-client communications exposed
• Medical records (protected by HIPAA) made public
• Trade negotiations revealed, damaging diplomatic relationships

When building the CIAM platform, we encrypted user authentication data. That data had a natural expiration (password changes, account deletions, session expirations).

But some data never expires. Medical records. Trade secrets. Legal documents. Those need protection that outlasts current encryption standards.

What's Actually Vulnerable (And What Isn't)

Not all encryption is equally threatened by quantum computers.

Extremely Vulnerable: Public-Key Cryptography

RSA encryption:

• Used for: Key exchange, digital signatures, encrypting data
• Quantum vulnerability: Shor's algorithm breaks it completely
• Time to break RSA-2048 with quantum computer: Hours
• Time to break RSA-4096: Still feasible with sufficient qubits

Elliptic Curve Cryptography (ECC):

• Used for: Digital signatures, key agreement (ECDH), TLS handshakes
• Quantum vulnerability: Modified Shor's algorithm breaks it
• Efficiency: Even faster to break than RSA of equivalent security

Diffie-Hellman key exchange:

• Used for: Establishing shared secrets (TLS, VPNs, SSH)
• Quantum vulnerability: Completely broken by quantum algorithms

Where this appears:

• TLS/SSL connections (the "lock" icon in browsers)
• VPN tunnels
• SSH connections
• Email encryption (PGP, S/MIME)
• Code signing
• Document signatures
• Cryptocurrency transactions

Essentially: Every secure connection on the internet uses these algorithms.

Moderately Vulnerable: Symmetric Encryption

AES (Advanced Encryption Standard):

• Used for: Bulk data encryption, file encryption, database encryption
• Quantum vulnerability: Grover's algorithm provides quadratic speedup
• Impact: AES-128 becomes equivalent to AES-64 (breakable)
• Solution: Use AES-256 (becomes equivalent to AES-128, still secure)

Impact on existing systems:

• AES-256 is likely quantum-safe (double the key size to compensate)
• AES-128 should be upgraded to AES-256
• Most symmetric encryption survives with key size increase

Good news: Symmetric encryption doesn't need complete replacement, just parameter adjustment.

What Actually Breaks First

The quantum threat attacks key exchange and authentication, not bulk encryption.

Here's what breaks down:

TLS handshake:

1. Client and server establish connection
2. RSA or ECDH used to exchange keys ← BROKEN BY QUANTUM
3. Symmetric key agreed upon
4. Data encrypted with AES ← Still secure

The problem: Even if the bulk data is encrypted with AES-256, the key exchange is vulnerable. Quantum computers can decrypt the handshake, recover the session key, and decrypt everything.

VPN connections:

• Initial key exchange uses public-key crypto ← BROKEN
• Bulk traffic encrypted with symmetric crypto ← Secure
• But breaking the key exchange exposes everything

Digital signatures:

• RSA or ECDSA signatures prove authenticity ← BROKEN
• Software updates signed with RSA ← Can be forged
• Financial transactions signed with ECDSA ← Can be forged

When building the CIAM platform, we used RSA for API authentication and session establishment. The bulk data was encrypted with AES-256.

We thought the AES-256 made us quantum-safe. We were wrong. The RSA key exchange made the entire system vulnerable.

Why Organizations Are Dangerously Unprepared

Despite the urgency, most organizations haven't started migration.

The numbers:

• Nearly 50% of enterprises in North America and Europe haven't integrated quantum computing into cybersecurity strategies
• 56% of mid-sized organizations admit they're not prepared for quantum threats
• Majority haven't begun structured response to post-quantum transition

Why the delay?

Complexity of Migration

This isn't a simple software update. It's a complete cryptographic infrastructure overhaul.

What needs to change:

• Replace RSA/ECC in TLS connections
• Update VPN protocols
• Modify SSH implementations
• Change code signing processes
• Update hardware security modules (HSMs)
• Replace smart cards and security tokens
• Modify embedded device firmware
• Update IoT device security
• Change blockchain implementations

Every system that uses public-key cryptography needs modification.

Legacy System Challenge

Many systems have cryptography deeply embedded:

Examples:

• Medical devices with 10-15 year lifespans (can't be updated easily)
• Industrial control systems (updating might require re-certification)
• Embedded systems with hardcoded keys
• Legacy mainframes with proprietary encryption
• Third-party dependencies (waiting for vendors to update)

The "Achilles' heel" of quantum readiness: Systems you can't easily modify but that encrypt sensitive long-lived data.

Cost and Resource Constraints

Migration costs include:

• New hardware (quantum-safe HSMs, updated network equipment)
• Software updates (every application using encryption)
• Testing and validation (ensure new algorithms work correctly)
• Training (teams need to understand new cryptography)
• Consulting (few have in-house quantum crypto expertise)
• Downtime (some systems require outages for updates)

Estimated cost for large enterprise: Tens to hundreds of millions of dollars

Timeline: 5-10 years for complete migration

"It Won't Happen to Us" Mentality

Many organizations fall into cognitive traps:

"Quantum computers are decades away"

• Conservative estimates: 2030-2035 (4-9 years from now)
• Problem: Migration takes 5-10 years
• Math: Already behind if you haven't started

"Our data isn't interesting to attackers"

• Harvest now, decrypt later is indiscriminate
• Attackers collect everything, sort out value later
• You don't know what will be valuable in 10 years

"We'll upgrade when we need to"

• Emergency upgrades are expensive and error-prone
• Rushing introduces security vulnerabilities
• No time to test properly under pressure

Quantum migration under emergency conditions will create more security problems than it solves.

What Actually Needs to Happen (The Migration Roadmap)

Migrating to post-quantum cryptography isn't a single action. It's a multi-year transformation program.

Here's what it actually looks like:

Phase 1: Inventory and Assessment (6-12 Months)

Cryptographic inventory:

• Where is public-key cryptography used?
• Which systems use RSA, ECC, Diffie-Hellman?
• What are the dependencies (libraries, hardware, vendors)?
• Which systems can be updated vs. which are locked?

Data classification:

• What data must remain confidential long-term?
• What's the required confidentiality window?
• Which data is being transmitted over potentially intercepted channels?

Risk prioritization:

• Systems with long-lived data + current RSA/ECC = highest risk
• Systems with short-lived data = lower priority
• Legacy systems that can't be updated = special handling

This phase is critical and often underestimated.

Most organizations discover they don't actually know where all their cryptography is deployed.

Phase 2: Algorithm Selection and Testing (12-18 Months)

Select post-quantum algorithms:

• ML-KEM for key encapsulation
• ML-DSA or SLH-DSA for digital signatures
• Hybrid approaches (classical + post-quantum)

Test in controlled environments:

• Performance impact (PQC algorithms are more computationally expensive)
• Compatibility with existing systems
• Library availability and maturity
• Hardware acceleration requirements

Build proof-of-concept deployments:

• Small-scale implementations
• Measure real-world performance
• Identify integration challenges
• Train teams on new algorithms

Phase 3: Critical System Migration (12-24 Months)

Prioritize highest-risk systems:

• Systems handling long-lived sensitive data
• Systems with current RSA/ECC key exchange
• Systems facing external threats
• Compliance-critical systems

Implement hybrid cryptography:

• Combine classical and post-quantum algorithms
• Ensures security even if PQC algorithms have undiscovered weaknesses
• Maintains backward compatibility during transition

Example hybrid TLS implementation:

Client → Server: 
  - Classical ECDH key exchange
  - ML-KEM key encapsulation
  - Combined key = hash(ECDH_key || ML-KEM_key)
  - Use combined key for session

This approach provides security even if either algorithm is broken.

Phase 4: Broader Deployment (24-48 Months)

Roll out to remaining systems:

• Lower-priority systems
• Systems with shorter data lifetimes
• Internal-only systems

Update vendor dependencies:

• Work with vendors to get PQC updates
• Replace vendors who can't/won't update
• Implement compensating controls for legacy systems

Continuous monitoring:

• Track algorithm usage across infrastructure
• Identify systems falling back to classical crypto
• Ensure policies enforce PQC where required

Phase 5: Legacy System Handling (Ongoing)

For systems that can't be updated:

Option 1: Isolation

• Remove from network exposure
• Air-gap if possible
• Physical security as compensating control

Option 2: Quantum-safe tunneling

• Wrap legacy protocols in PQC-protected channels
• Example: Legacy VPN inside PQC-encrypted tunnel

Option 3: Data migration

• Move data out of legacy systems
• Re-encrypt with post-quantum algorithms
• Decommission legacy systems

Option 4: Accept risk

• Document decision
• Implement monitoring and detection
• Plan for incident response if compromise occurs

When building the CIAM platform, we maintained hybrid authentication approaches during transitions. Supporting both old and new simultaneously allowed gradual migration.

The same strategy applies to quantum migration: hybrid approaches during transition, full PQC as end state.

What CISOs Should Do This Quarter

If you're responsible for security, here's your prioritized action plan:

Immediate Actions (This Month)

1. Inventory long-lived data

What data must remain confidential for 5+ years?

• Financial records
• Healthcare information
• Trade secrets
• Legal documents
• Customer data
• Employee records

For each dataset, ask:

• Where is it stored?
• How is it encrypted?
• When was it encrypted?
• Has it been transmitted over networks?
• Could it have been intercepted?

Red flag: Data encrypted with RSA/ECC before 2024 and transmitted over networks = assume already harvested.

2. Assess vendor quantum readiness

Contact critical vendors:

• What's your PQC migration timeline?
• When will you support NIST PQC standards?
• Do you offer hybrid encryption options?
• What's your plan for legacy systems?

Vendors without answers are vendors creating risk.

3. Calculate your Mosca's Theorem

Use the formula X + Y > Z:

• X = Your realistic migration timeline (be honest, probably 5-10 years)
• Y = Your longest data confidentiality requirement
• Z = When you think quantum threat arrives (use 2032 as conservative estimate)

If X + Y > Z, you're already behind.

This Quarter Actions

4. Establish quantum security task force

This is cross-functional, not just IT:

• CISO (owns the program)
• CTO (technical feasibility)
• CFO (budget and resource allocation)
• Legal (compliance and risk)
• Business leaders (data classification and priorities)

Quantum migration impacts entire organization, not just security team.

5. Develop high-level migration roadmap

2026: Assessment and planning

• Complete cryptographic inventory
• Classify data by confidentiality requirements
• Test PQC algorithms in lab environment

2027-2028: Critical system migration

• Deploy hybrid encryption to highest-risk systems
• Begin migrating customer-facing services
• Update TLS/VPN implementations

2029-2030: Broad deployment

• Migrate remaining systems
• Address vendor dependencies
• Handle legacy system challenges

2031+: Completion and maintenance

• Decommission classical-only systems
• Continuous monitoring and updates
• Respond to new algorithm developments

6. Budget for quantum migration

Costs to include:

• Consulting (algorithm selection, architecture design)
• Hardware (quantum-safe HSMs, updated network equipment)
• Software (licenses, development, testing)
• Personnel (training, additional staff, contractor support)
• Downtime (lost productivity during migrations)

Rule of thumb: 5-15% of annual IT budget for 5 years

This isn't optional spending. It's security infrastructure investment.

Long-Term Strategic Actions

7. Implement crypto-agility

Crypto-agility = ability to rapidly replace cryptographic algorithms without major architectural changes.

Key principles:

• Abstraction layers (applications don't call crypto directly)
• Configuration-driven algorithm selection
• Support for multiple algorithms simultaneously
• Automated testing of cryptographic implementations

Why this matters:

• PQC algorithms might have undiscovered weaknesses
• New quantum-safe algorithms will emerge
• Regulations may mandate specific algorithms

Organizations with crypto-agility can adapt quickly. Those without face emergency rewrites.

8. Join industry working groups

Individual organizations can't solve this alone.

Participate in:

• Industry-specific PQC initiatives (finance, healthcare, government)
• Standards bodies (NIST, IETF, ISO)
• Vendor partnerships (work with crypto providers on roadmaps)
• Information sharing (learn from others' migrations)

The first organizations to migrate will make mistakes. Learn from them instead of repeating them.

9. Monitor quantum computing progress

Track developments:

• Qubit counts in commercial systems
• Error rates and fault tolerance improvements
• Academic breakthroughs
• Government investments

These signal how close the threat is.

When building the CIAM platform, we monitored emerging authentication standards and began supporting them before they were widely adopted.

The same applies to PQC: early adoption positions you ahead of the threat, not behind it.

The Global Coordination Challenge

Unlike most cybersecurity threats, quantum computing requires unprecedented global coordination.

Why?

Interoperability Requirements

Encryption only works if both parties use compatible algorithms.

Example:

• Bank A migrates to ML-KEM for key exchange
• Bank B still uses RSA
• They can't communicate securely

The solution: Global coordination on timeline and standards

This is why G7, EU, NIST, and FBI are coordinating. Individual organization migration isn't enough. The ecosystem must migrate together.

Regulatory Landscape

Different jurisdictions approaching PQC differently:

European Union:

• Mandated timelines (2026, 2030, 2035)
• Member state coordination required
• Focused on critical infrastructure

United States:

• NIST standards finalized (2024)
• Executive action expected (2026)
• Federal agencies leading migration
• Private sector following

China:

• Significant quantum computing investment
• Developing own PQC standards
• May not align with Western standards

Asia-Pacific:

• Varied approaches by country
• Some following NIST standards
• Others developing regional approaches

The challenge: Operating globally while complying with divergent regional requirements.

Supply Chain Dependencies

Your organization might be ready. But:

• Cloud providers must support PQC
• SaaS vendors must migrate
• Hardware manufacturers must ship quantum-safe equipment
• Certificate authorities must issue PQC certificates
• Browser vendors must implement standards

The migration only works if the entire supply chain moves together.

When building the CIAM platform, we learned that authentication standards only succeed when broadly adopted. OAuth worked because everyone implemented it.

PQC will only protect organizations when universally deployed.

The Uncomfortable Truth About Timing

Here's what most organizations don't want to hear:

If you encrypted sensitive data in 2020 with RSA, and that data must remain secret until 2040, you've already failed.

The encrypted data was intercepted. It's stored. It's waiting.

You can't un-harvest data that's already been harvested.

What you can do:

• Stop creating new vulnerable data (migrate to PQC now)
• Minimize exposure of existing vulnerable data (re-encrypt critical archives with PQC)
• Plan for disclosure (assume data from 2020-2025 will eventually leak)
• Build resilience (design systems assuming historical data will be exposed)

The window to protect data encrypted 2020-2025 is closing rapidly.

Data encrypted 2026 onward with hybrid or full PQC stands a much better chance.

The Psychology of Distant Threats

Humans are bad at responding to threats that are:

• Probabilistic (might happen, not guaranteed)
• Distant (years away, not imminent)
• Abstract (quantum computers sound like science fiction)

This creates dangerous complacency.

Organizations that wait for certainty ("we'll migrate when quantum computers are proven") will be too late. Migration takes years. You can't start when the threat arrives.

By the time it's certain quantum computers can break encryption, the window to protect data has already closed.

When building the CIAM platform, I invested in zero-trust architecture before breaches forced us to. Proactive security is cheaper and more effective than reactive security.

Quantum migration is the same. Invest now while you have time, or scramble later under emergency conditions.

The Bottom Line

The encrypted data you thought was safe is actually a ticking time bomb.

The facts:

• Attackers are harvesting encrypted data now (VPN sessions, TLS traffic, email, backups)
• Quantum computers will decrypt this data in 2030-2035
• Data encrypted 2019-2025 with RSA/ECC is already exposed
• Migration to post-quantum cryptography takes 5-10 years
• G7, EU, and U.S. government mandating PQC migration in 2026
• Most organizations haven't started

The math:

• X (migration time) + Y (data lifetime) > Z (quantum arrival) = URGENT
• For most organizations: 10 years + 20 years > 8 years = Already behind

The actions:

• Inventory cryptographic systems and long-lived data this month
• Calculate your Mosca's Theorem this quarter
• Begin PQC testing and vendor assessment this year
• Start critical system migration by 2027
• Complete full migration by 2030

The stakes:

• Trade secrets from 2020 exposed in 2032
• Medical records from 2023 readable in 2035
• Government communications from 2024 leaked in 2033
• Financial transactions from 2025 compromised in 2034

The choice:

• Start migration now while you have time to do it right
• Or scramble later under emergency conditions when quantum computers are proven

There's no third option where you wait, do nothing, and somehow remain secure.

The quantum time bomb is ticking. The only question is whether your data's encryption expires before or after your data's confidentiality requirements.

For most organizations using RSA/ECC today, the answer is already clear: the encryption will fail first.

The time to act is now. Not when quantum computers are proven. Not when regulators mandate it. Now.

Because the data harvested today will be decrypted tomorrow. And tomorrow is closer than you think.

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Key Takeaways

• G7 declared 2026 "Year of Quantum Security" with mandatory Risk Assessment & Planning for financial sector
• EU mandates Member States develop PQC plans by Dec 31, 2026; critical infrastructure secure by 2030
• "Harvest now, decrypt later" threat is active: attackers storing encrypted data to decrypt with future quantum computers
• Mosca's Theorem (X + Y > Z): Migration time + data lifetime > quantum arrival = urgent migration needed
• RSA and ECC encryption completely broken by quantum computers using Shor's algorithm
• Data encrypted 2019-2025 with RSA/ECC and transmitted over networks likely already harvested
• Symmetric encryption (AES-256) survives but key exchange protocols (RSA, ECDH) are vulnerable
• Migration takes 5-10 years: inventory, testing, critical systems, broad deployment, legacy handling
• 56% of mid-sized orgs admit they're not prepared; nearly 50% haven't integrated quantum into security strategy
• Hybrid cryptography (classical + PQC) recommended during transition for backward compatibility and safety
• Organizations must: inventory long-lived data NOW, calculate Mosca's Theorem, assess vendor readiness, budget for migration
• Global coordination required: PQC only works with ecosystem-wide adoption across vendors, cloud providers, standards
• NIST standards finalized 2024: ML-KEM, ML-DSA, SLH-DSA, FN-DSA production-ready
• Data encrypted today with RSA that must stay secret until 2040 is already exposed if intercepted

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Building encryption systems for long-lived data? My Customer Identity Hub covers zero-trust architecture, authentication best practices, and data privacy frameworks that include cryptographic agility planning.

Deepak Gupta is the co-founder and CEO of GrackerAI. He previously founded a CIAM platform that scaled to serve 1B+ users globally. He writes about AI, cybersecurity, and digital identity at guptadeepak.com.

*** This is a Security Bloggers Network syndicated blog from Deepak Gupta | AI & Cybersecurity Innovation Leader | Founder's Journey from Code to Scale authored by Deepak Gupta - Tech Entrepreneur, Cybersecurity Author. Read the original post at: https://guptadeepak.com/why-your-encrypted-data-from-2019-is-already-compromised-the-quantum-time-bomb/