Literature Review from the year 2014 in the subject Computer Science - IT-Security, grade: 1.0, , language: English, abstract: In the present era of the distributed system where almost the complete world has been engaged in social networking, how one can claim that he/she get the real authenticated content. Since the content on the internet is not verified especially the social media content where the people post mostly the doubtful information. The main difficult problem is the filtering of truth from such contents. In such a situation social media find the new challenge of establishing veracity (doubtable data). So a new system PHEME is going to establish for analyzing the content in social sites, blogs and socially related posts based on the language and determine the uncertainty or the doubts in the content. This system will help not only in medical information systems (where causes serious damages if the wrong information held) but also in digital journalism.