Metody ochrany proti odposlechu a sledování v digitálních sítích

The aim of this work is to provide a comprehensive overview of eavesdropping and snooping in digital networks, describe possible threats and show technological and organizational precautions against them. The first chapter introduces the reader into the topic and shows all the main threats. The second chapter describes technological precautions with the emphasis on data flow. The first part of this chapter explains the terminology. Next part tries to solve the security of each type of a communicational channel followed by the virtual private networks issues, physical networks and the risks of encryption. The third chapter analyses organizational issues with the emphasis on legislation. Precautions in this chapter make the technology from the previous chapter more effective. The fourth chapter uses the findings from previous chapters and tries to secure a company in all its complexity. This allows the estimation of total cost. The practical part of this thesis should serve for companies with already developed infrastructure who want a transparent solution that would protect them from eavesdropping and data thefts.