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CESNET's OptiLAB recently tested a newly acquired TOSHIBA LD quantum key distribution (QKD) system that represents the cutting edge of secure quantum communication. This system enables the generation and distribution of cryptographic keys based on quantum phenomena, thus ensuring an extremely high level of security against eavesdropping. The acquisition of the QKD system is part of a broader strategy to develop a quantum secure infrastructure and its deployment opens up new opportunities for research in quantum cryptography and single photon physics.

On the website of the IPv6 Day 2025 conference, which will take place on 6 June at the National Technical Library, you can find the complete programme of this year's. A busy day of lectures, news and inspiration from the world of IPv6 awaits you.
Feel free to register via the online form  – it won't work without registration.

Are you wondering what violates not only Einstein's laws but also common sense? Come to the lecture on 15 May at CESNET and hear the latest news in quantum cryptography. More information here. 

On Friday, 6 June 2025, the next edition of the traditional IPv6 Day conference will take place, to which we cordially invite you. Come and get inspired, hear the latest news and meet members of the community. The event is organized together with our partners CZ.NIC and NIX.CZ at the National Technical Library in Prague.

Vladimír Pavlík left us forever on 27 February 2025. Vláďa was part of the team of people who brought the Internet to the Czech Republic, or more precisely, connected the Czech Republic to the global Internet. He was able to talk about this period very beautifully and with humour. He was one of the last living true experts on the first commercial Unix platforms, such as the SunOS and later Solaris operating systems from SUN. Managing these systems was a real art, comparable, for example, to playing the violin, which he also mastered. At CESNET, for many years, he w

Pavel Vachek left us forever on February 3, 2025. His name brings to mind words such as modesty, humility, diligence, willingness, reliability, generosity. And such First Republic gentlemanliness. And a great outlook. He could talk to anyone, not only about work, but also about literature, politics, family, faith - in short, about life. But underneath the kind, unassuming veneer, there was also an expert with immense knowledge, which he was happy to impart. Andrea Kropáčová: Pavel was one of my first teachers after joining CESNET. In his gentle and non-violent way, he trans