This chapter conceptualises ‘encounter' as the critical moment where possibilities of positive security emerge. The conceptualisation will be conducted through rethinking Human Security (HS). It addresses the problem by setting up a novel HS framework and demonstrates its potential by studying it through the case of the migration–security nexus in Europe. The chapter develops radical human security as a research agenda through positive security that can be sought by studying humans' everyday (in)security performances. Radical human security research agenda can lead to the following conceptual openings in relation to the European border regime. As the analytical focus shifts from what the sovereign authorities do in the politics of security to the daily security performances of humans within and beyond Europe, radical HS enables us to investigate how humans are produced discursively and politically as subjects and objects of the regime.