Our daily working routines have become more dynamical and swifter – we do not have time to wait for a colleague to compile and send us the data whilst we are on an airplane replying to e-mails, or we may be in a situation when we need to plan and organize a meeting online without any interferences and to be able to send enormous data to all the participants. At the same time, we cannot take the risks of losing sensitive data to the web or to be certain that a wireless connection in a cafeteria is secured enough and unauthorized person will not gain access to it.