A cybersecurity community from Katowice that holds free monthly meetups in Katowice, at the ING Hubs Poland office, and in Warsaw, at The Taps pub. Speakers talk about cybersecurity, demonstrate techniques and train attendees, and agendas cover topics such as attacks using AI agents, local language models and FIDO2 keys. Dates with agendas are posted on Meetup. The 17 53c brand is linked to a foundation entered in the National Court Register, the 17 53C Foundation for Cybersecurity, whose goal is action for cybersecurity, in particular building awareness and popularising the field. On 5 June 2026 the founders decided to dissolve the foundation, and on 7 September 2026 the court entered the opening of its liquidation in the National Court Register.
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