aiqbench analysis
Colt and Ciena have successfully demonstrated high-speed, quantum-safe data transmission across a 6,900 km transatlantic link, validating the readiness of post-quantum cryptography for enterprise-scale workloads. This trial directly addresses the "harvest now, decrypt later" threat by proving that 800GbE services can maintain security against future quantum decryption risks without sacrificing performance. The result confirms that critical infrastructure operators can now deploy robust defenses against emerging quantum threats on existing global networks.
Colt and Ciena Complete Quantum-Safe Transatlantic Network Trial

Insider Brief PRESS RELEASE — Colt Technology Services (Colt), the global digital infrastructure company, and Ciena (NYSE: CIEN), the global leader in high-speed connectivity, have completed one of the fastest quantum-safe data transmissions ever demonstrated and the fastest across a transatlantic route. The landmark trial successfully protected live data running across 6900km of Colt’s subsea and terrestrial network […]
Colt and Ciena completed a quantum-safe data transmission trial between New York and London at an 800GbE service rate across 6,900 km of subsea and terrestrial network infrastructure. The trial used Ciena’s WaveLogic 6 Extreme encryption technology with post-quantum cryptography capabilities to protect live data in transit. The companies said the demonstration showed the feasibility of high-speed quantum-safe connectivity for enterprise, government, healthcare, and…
Excerpt shown under the publisher's RSS terms · 64 words · full text and figures are on the publisher's site
Related coverage

Quantum-Safe Data Moves at 800GbE Between New York & London
Quantum Zeitgeist · Jun 10, 2026

Quantum Corridor, Ciena and Toshiba Test 1.6 Tb/s Quantum-Safe Network Encryption
The Quantum Insider · Aug 4, 2026
News Archive 2026
Quantum Computing Report · Jul 25, 2026

Quantum Corridor, Ciena, and Toshiba Validate 1.6 Tb/s Quantum-Safe Encryption on Live Fiber Network
Quantum Computing Report · Aug 5, 2026