As quantum computers grow more powerful, the encryption that protects everything from bank transactions to military communications faces an existential threat. Here's where things actually stand in 2026.
Current State
IBM's latest quantum processor has reached 1,200 qubits, and Google claims to have achieved "quantum supremacy" on specific computational problems. However, breaking RSA-2048 encryption would require approximately 4,000 error-corrected logical qubits — we're not there yet.
The "Harvest Now, Decrypt Later" Problem
Nation-state actors are already collecting encrypted data today with the expectation of decrypting it once quantum computers are powerful enough. This makes transitioning to post-quantum cryptography urgent even though the threat isn't immediate.
Post-Quantum Solutions
- NIST finalized four post-quantum cryptographic standards in 2024
- CRYSTALS-Kyber for key encapsulation
- CRYSTALS-Dilithium for digital signatures
- Major tech companies have begun migration (Google, Apple, Signal)
Experts estimate we have 10-15 years before quantum computers can break current encryption, but the migration will take just as long — making now the time to start.
