The two-days international conference of the Hungarian prison service has been honoured with lectures of nationwide leaders or representatives of prison services of the Visegrád Four countries and of Austria and Romania. The appearance of the coronavirus pandemic in 2020 demanded handling of the emergency cases, new dimensions of cooperation among organisations and implementation of special defence tasks beside managing basic duties. The best national and international practices performed at the conference presented how important can be the harmonisation of activities of organisations in charge of exterior and interior safety, like military, law enforcement organisations and public administrative civic authorities. The deciding points of a successful defence were the healthcare supply and within that a fast and suitable transformation of infrastructures, resp. the successful preparation of the staff of prison service and the coordination of their professional tasks. New action plans and methods were worked out in order to fulfil the measurements in connection with the pandemic with guarantee for the safety of detention.