Dev.to
5/10/2026

Protect Data from Quantum Computers
Short summary
Quantum computers will break RSA and ECDH encryption via Shor's algorithm—a mathematical certainty, not speculation. Intelligence agencies are already harvesting encrypted traffic for future decryption. Medical records, financial data, and legal documents encrypted today are at urgent risk; NSA mandates transition to post-quantum cryptography by 2035 for National Security Systems. Symmetric encryption (AES-256) remains safe, but key exchange is the weak link.
- •Quantum computers will decrypt RSA/ECDH-protected data using Shor's algorithm
- •Intelligence agencies are harvesting encrypted data now to decrypt later with quantum computers
- •Medical, financial, and legal data needs post-quantum protection immediately; NSA deadline is 2035
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