Revealing viber communication patterns to assess protocol vulnerability

Viber is a proprietary communication protocol growing in popularity, on mobile devices especially. It represents a trend of replacing traditional protocols with proprietary messaging applications, employing cloud infrastructure support. It also constitutes a challenge to the networking community due to its unknown properties and opaque and highly distributed nature. We present observations-based analysis of the protocol function, topology, communication patterns and vulnerabilities, derived from traffic captures by simple data mining.