# Quantum Computing & Cryptographic Risk: What You Should Prepare for Now
Quantum computers are coming. Not in 50 years. In 10-15 years.
When they arrive, they will instantly break the encryption protecting your sensitive data.
This is not speculation. This is physics.
The Quantum Threat
How Current Encryption Works
RSA-2048 (most common encryption): - A factor is a product of two prime numbers - Breaking RSA requires finding those prime factors - Current computers: 2^2048 possible attempts needed - Time to break: 1 billion years (with best current algorithms)
Quantum computers: - Use Shor's algorithm (fundamentally different approach) - Time to break RSA-2048: 8 hours
Impact: Everything encrypted with RSA/ECC becomes breakable
The Timeline
2024: Quantum computers reach "utility" stage (IBM, Google) 2026-2030: Quantum computers reach "cryptographically relevant" threshold 2035: Quantum computers can break current encryption at scale
But wait: The threat exists RIGHT NOW.
Harvest Now, Decrypt Later
The attack vector: 1. Nation states and sophisticated adversaries are recording encrypted data now 2. Once quantum computers exist, they'll decrypt the archived data 3. Your data secured with today's encryption is vulnerable retroactively
Example: 2024: Adversary records your encrypted financial data 2030: Quantum computers break the encryption 2030: Your 6-year-old sensitive data is now readable
Who cares? Anyone holding ultra-sensitive information for 10+ years: - Family office holdings and transaction history - Medical records - Legal documents - Proprietary technology - Government secrets
The Solution: Post-Quantum Cryptography
NIST's Post-Quantum Standards (Approved 2022)
The US National Institute of Standards and Technology spent 8 years evaluating post-quantum cryptography algorithms.
Approved for use:
Public Key Encryption:
├─ ML-KEM (Kyber) — Quantum-resistant key encapsulation
└─ Classic McEliece — Lattice-based encryptionKey characteristics: - Order 10^6x slower than RSA (still fast enough for production) - Larger key sizes (200-400 bytes vs. 100-200 bytes for RSA) - Proven mathematical hardness (resistt both quantum and classical attacks)
Implementation Strategy
Phase 1: Assessment (Month 1) - Identify all systems using encryption - Categorize by sensitivity and data lifetime - Prioritize: long-living sensitive data first
Phase 2: Pilot (Months 2-3) - Implement post-quantum cryptography in non-critical systems - Test performance impact - Identify integration challenges
Phase 3: Migration (Months 4-12) - Migrate critical systems to post-quantum crypto - Maintain backward compatibility (some users still have old encryption) - Test extensively
Phase 4: Hybrid Mode (Months 6-24) - Run both RSA and post-quantum crypto simultaneously - Gradually phase out RSA - Monitor for issues
Technical Implementation
Recommended approach for new systems:
// Generate hybrid keys (both post-quantum and RSA)
const keys = {
postQuantum: generateKyberKeys(), // NIST-approved
rsa: generateRSA2048Keys(), // Fallback for now
}// Encrypt with both algorithms const ciphertext = encrypt(data, { primary: postQuantumEncrypt(data, keys.postQuantum), fallback: rsaEncrypt(data, keys.rsa) })
The Business Case
Risk if you do nothing: - Current sensitive data becomes readable in 10-15 years - Cost of breach: $1-10B (depending on data sensitivity) - Regulatory penalties if you failed to implement known security measures
Cost of migration: - Assessment: $100-200k - Pilot: $200-400k - Full migration: $1-2M - Total: $1.5-2.5M
Timeline: 18-24 months
ROI: Priceless (preventing a $1-10B breach)
What You Should Do Today
For Enterprises 1. Conduct a cryptographic audit — What's encrypted? With what? How long does data need protection? 2. Inventory critical data — What would be catastrophic if decrypted in 2035? 3. Develop a migration plan — How will you migrate systems over 18 months? 4. Start early — Begin migration now; finish by 2030
For Individuals & Family Offices 1. Review sensitive documents — Financial records, legal agreements, medical data 2. Consider re-encryption — Can you re-encrypt with post-quantum algorithms? 3. Storage considerations — Use quantum-resistant encryption for long-term storage 4. Advisor relationships — Work with advisors using quantum-resistant infrastructure
The Reality Check
Organizations that start migration in 2026-2027 will be fine. Organizations that wait until 2030-2032 will scramble and make mistakes.
The question isn't "Is post-quantum cryptography important?" It's "When will you implement it?"
Start now. Don't rush. But don't delay.