Arqit and Sparkle achieve quantum-resistant encryption at the speed of light

LONDON, Dec. 03, 2025 (GLOBE NEWSWIRE) -- Arqit Quantum Inc. (NASDAQ: ARQQ, “Arqit”), a global leader in quantum-safe encryption, and Sparkle, a Tier 1 global telecoms operator, have successfully demonstrated quantum-resilient data transmission across Sparkle’s optical network in Greece. The proof of concept (POC), implemented over Sparkle metropolitan optical ring in Athens, shows how Arqit’s encryption technology can be embedded directly into the optical transport layer, protecting high-capacity networks ...