Plano, TX, April 13, 2026 -- Ribbon Communications Inc., a global leader in real-time communications technology and IP optical networking solutions, today announced the successful completion of a Quantum Key Distribution (QKD) proof of concept with CESNET, operator of the Czech Republic’s national academic computer network. Ribbon is committed to helping service providers, enterprises and critical infrastructure operators worldwide modernize and secure their networks and services.

“Our mission is to ensure the highest level of security for academic and research communications,” said Václav Novák, Head of the Network Infrastructure Department, CESNET. “This successful test builds on our long-term partnership with Ribbon and demonstrates that quantum encryption can be deployed in real-world optical networks without compromising performance.”

Ribbon’s Apollo optical networking system adds Layer 1 optical encryption with virtually zero latency and no overhead, blocking all payload and addressing information. This configuration ensures encrypted DWDM/OTN networks can carry any client service without interoperability issues. Optical encryption is a powerful tool in the fight against unwanted intrusion, and Apollo enables operators to use it internally or offer it as a value-added service to customers.

“QKD represents the future of secure networking,” said Christian Erbe, Ribbon’s Head of EMEA Sales. “We’re proud to support CESNET and deliver a security solution that is virtually impenetrable and ready for the next generation of network threats.”