This thesis deals with the theory of speech acts which is based mainly on analysis of speech and its function in communication. We use speech not only to convey something but to also do something, to change the state of things around us and to accomplish specific goals. Speech acts in a literary piece are then analyzed on theoretical basis, specifically in Milan Kundera's dramatic play Majitelé klíčů.

Telemetry system, Optimisation, Sensoric networks, Smart Grid, Internet of Things, Sensors, Information security, Cryptography, Cryptography algorithms, Cryptosystem, Confidentiality, Integrity, Authentication, Data freshness, Non-Repudiation.