Cloud computing technologies applying virtual IT infrastructure find broad application in e-economy, offering high efficiency and a possibility of calibration of systems as well as a high rate of implementation, without the necessity of clients’ incurring high costs. Cloud Computing is based on employing a huge potential of servers and it guarantees the use of the latest programming platforms. The possibility of remote and flexible use of IT resources, without the necessity of investing in one’s own hardware or software and managing them, leads to considerable savings. Cloud computing services are particularly attractive for small and medium-sized enterprises, however what raises doubts here is data security. The aim of this pap...