The security of communication in everyday life becomes very important. On the other hand, all existing encryption protocols require from user additional knowledge end resources. In this paper we discuss the problem of public key distribution between interested parties. We propose to use a popular social media as a channel to publish public keys. This way of key distribution allows also easily connect owner of the key with real person institution (what is not always easy). Recognizing that the mobile devices become the main tool of communication, we present description of mobile application that uses proposed security methods.