AES-128, the workhorse of modern encryption, faces a persistent rumor. Quantum computers will gut it. That’s the story many tell. But experts say otherwise. It’s time to separate fact from folklore. Adopted by NIST in 2001, AES-128 secures everything from VPNs to cloud storage with its 128-bit keys. Brute-forcing those demands 2^128 operations—about 3.4 × 10^38 trials. At 2026 Bitcoin mining speeds, that clocks in at nine billion years. No classical machine cracks it anytime soon. Enter quantum fears. Grover’s algorithm promises a square-root speedup, slashing the search to 2^64 steps. Sounds dire. One machine could do it in seconds, right? Wrong. The myth ignores how real attacks work. Cryptography engineer Filippo Valsorda laid it bare in his April 2026 post, ‘Quantum Computers Are Not a Threat to 128-bit Symmetric Keys’ . “There’s a common misconception that quantum computers will ‘halve’ the security of symmetric keys,” he wrote.…