The third Central European Cybersecurity Conference – CECC 2019 aims at establishing a venue for the exchange of information on cybersecurity and its many aspects between academics and practitioners in central Europe. CECC 2019 encourages the dialogue between researchers of technical and social aspects of cybersecurity, both crucial in attaining adequate levels of cybersecurity. Complementary contributions dealing with its economic aspects as well as any legal, investigation or other issues related to cybersecurity are welcome, too.