Will quantum computing break current encryption?
Quantum threat: sufficiently powerful quantum computers could break current asymmetric encryption (RSA, ECC), potentially compromising TLS, DKIM signatures, and S/MIME/PGP. "Sufficiently powerful" doesn't exist yet but is expected.
Timeline: estimates vary from 10 to 30 years for cryptographically relevant quantum computers. Harvest now, decrypt later attacks are already a concern for long-lived secrets.
Preparation: post-quantum cryptography standards are being developed (NIST standardization process). Organizations should plan for crypto agility, enabling algorithm updates when needed.
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