IT security threats in cloud computing sourcing model

New information technologies have been developing nowadays at an amazing speed, affecting the functioning of organizations significantly. Due to the development of new technologies, especially mobile ones, borders in the functioning of modern organizations diminish and models of running business change. Almost all organizations are involved in some way in sourcing activities, and each of them develops a sourcing relationship that suits its particular needs. In this article different kinds of outsourcing models were discussed, which are applied in the contemporary management, with particular emphasis put on cloud computing. The main aim of this article is to present the most important risks related to the introduction of management models based on the most recent IT technologies, e.g. cloud computing, and emphasizing the role of appropriate IT security management in the times of globalization of organization virtualization.