1. A system for enabling analysis of similarity of instances of communication content while preserving confidentiality, comprising: means for capturing communication content including instances of communication content that can be rendered into text; means for processing said captured communication content to adjust a level of similarity between separate instances of communication content; means for hashing at least part of said processed communication content to obscure the actual communication content and to produce hashed tokens; means for analyzing said communication content, subsequent to said hashing; and means for outputting at least one selected from a group comprising: message analysis, usage analysis, and network analysis, wherein said means for outputting network analysis employs a graphical interface having a circular layout where information on a social network is provided by all parameters comprising: measure of radii of nodes representing social units in said network, measure of angles of nodes representing social units in said network, color of nodes representing social units in said network, color of links connecting nodes representing social units in said network, shading of nodes representing social units in said network, shading of links connecting nodes representing social units in said network, line-type of links connecting nodes representing social units in said network, and shading of a range of angles of nodes representing social units in said network.