The concept of electoral security as one of the prerequisites of post-conflict transformations is becoming widespread in operational documents of international organizations (UN) and some national agencies (USAID), expressing the responsibility to promote peace-building activities in a fragile political environment. In the context of human rights based approach, this concept assumes a special meaning for democratic transformations and reforms. It is strongly connected with such concepts as electoral conflict, electoral justice, electoral integrity, and transitional justice. The broad international experience of electoral security implementation enables the search of strategies for a consistent electoral reform in Ukraine and capacity building for elections at the uncontrolled districts of Donetsk and Luhansk regions after the end of the conflict.