Privacy-Preserving Instant Messaging Application

Instant messaging applications noted significant grow especially in the last decade. In fact,the Internet communication is cheap and convenient way how to communicate with distant people.However, this grow of user communication and data exchange through the online world impactsuser security and privacy, as it was also shown recently by WhatsApp privacy issues. Firstly thisarticle evaluates security and privacy issues of current mobile messaging applications. Secondly, wedesign our basic open source solution with the focus on security, privacy, and user centric features.Furthermore, we provide proof-of-concept implementation of our system