Telecom operator Sparkle from Italy, together with European satellite provider Hellas Sat, has launched a first-of-its-kind secure channel between Greece and Cyprus. This is a landmark event for the region: for the first time, two countries are connected by a line resistant to attacks using quantum computing.
The route runs from Sparkle's data center in Athens to Hellas Sat's infrastructure in Cyprus, using an existing satellite channel. The length of the route is impressive—about 72,000 kilometers—highlighting the complexity and scale of the engineering solution.
Next-Generation Protection Technology
At the core of the project is the Quantum Safe Interconnect (QSI) development. This system provides quantum-resistant delivery of encryption keys and their automatic rotation within a secure connection based on the IPsec protocol. The key goal is to protect standard satellite traffic from hypothetical attacks by quantum computers, which could eventually crack traditional cryptographic algorithms.
Notably, this is not the partners' first step in this direction. Back in March, Sparkle and Hellas Sat successfully tested QSI between two Greek data centers. At that time, plans were announced to test the technology in a satellite environment—and now this stage has been completed.
Commercial Prospects
Currently, the companies are focused on assessing the feasibility of launching commercial quantum-resistant satellite services. This is primarily of interest to corporate clients with distributed infrastructure, remote facilities, or critical systems where data integrity is crucial.
This step fits logically into a global trend: in July, the International Organization for Standardization already included the post-quantum algorithm Classic McEliece in the asymmetric encryption standard. This confirms that the industry is actively preparing for the post-quantum era.
My view: the Sparkle and Hellas Sat initiative is not just a technical experiment but a strategic signal to the market. Satellite communication remains a vulnerable link for interception, and the implementation of quantum-resistant protocols on such routes will become a mandatory requirement for operators handling sensitive data. Those who begin integration now will gain a significant competitive advantage by the time quantum threats become widespread.