The goal of this thesis is a design of user interface for storage encryption application. A questionnaire that helps to understand the users is a part of thesis. User roles and a specification of functionality of storage encryption application follow. Next comes an analysis of existing applications for storage encryption, namely TrueCrypt, BitLocker, zuluCrypt and LibreCrypt. The main contribution of this thesis are a set of recommendations on how to create a new user interface and a proposal of screens of a new application.