11 Jun 2026

Colt Technology Services (Colt), the global digital infrastructure company, and Ciena, the global pioneer 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 between New York and London with Ciena’s WaveLogic 6 Extreme (WL6e) encryption solution. The trial proved that data can be securely transmitted at an 800Gb Ethernet (GbE) service rate - fast enough to move data centre scale volumes across the Atlantic in seconds - while remaining protected against growing quantum threats.