On 09 October 2025, the Restena Foundation held its eighth CyberDay.lu. This annual event dedicated to cybersecurity for research and education was also broadcasted live on the event website. The 2025 edition brought together around 100 participants, including BTS students from the Lycée Guillaume Kroll in Esch-sur-Alzette, and attracted just over 50 views on the live streaming. From Belval or their (home)office, everyone was made aware of the cybersecurity issues.

The morning of presentations began with the opening speech from Asmaa Ouraini, Cybersecurity Advisor at the Institut luxembourgeois de régulation (ILR). During her speech, the importance of cooperation between regulators, entities and incident response actors to build a safer digital ecosystem was particularly emphasised. On the stage of the Skip Pavilion, cybersecurity specialists took turns sharing their insights and expertise. For the 2025 edition, the Ministry of Foreign and European Affairs, Defence, Development Cooperation and Foreign Trade – Directorate of Defence and the University of Luxembourg joined BEE SECURE, Luxembourg House of Cybersecurity (Computer Incident Response Center Luxembourg - CIRCL), Restena and Proximus NXT who have been involved for several years. Together, they raised awareness and trained participants on a wide range of topics.

• The information security challenges in higher education and research environments, such as managing shadow IT and sensitive research projects, or complying with the General Data Protection Regulation (GDPR) and the Directive on measures for a high common level of cybersecurity across the European Union (‘NIS 2 directive’).
• Automated software vulnerability severity classification predicted from textual descriptions, enabling faster and more consistent triage prior to manual scoring by the Common Vulnerability Scoring System (CVSS).
• Full disk encryption and how to respond if this data protection security measure does not work as expected.
• The potential risks associated with the use of large language models (LLMs), a tool capable of understanding and generating human-like text, that can be exploited to produce harmful or unintended outcomes.
• The need to talk openly about risks to improve its company's IT security.
• The importance of resilience, or the ability to recover quickly or adapt well to change or problems, and how independent skills can help develop and maintain it over the long term.

The global cyber defence exercise “Locked Shields”, organised by the NATO Cooperative Cyber Defence Centre of Excellence (CCDCOE), was also presented to the public, highlighting Luxembourg's participation and opportunities in education and research.

Alongside the conference, several entities took part in the exhibitor area organised for the occasion. BEE SECURE, the Digital Learning Hub, Proximus NXT, and Women Cyber Force – Women4Cyber Luxembourg presented their services, training and activities in the field of cybersecurity in greater detail.