Latest release

Version 0.2 server files


Oct 10, 2009: Thesis finished
Aug 8, 2009: EXOS goes public

Behind EXOS

The concept and the initial implementation of EXOS are the results of a bachelor-thesis done at the University of Applied Sciences Northwestern Switzerland by Andreas Antener and Fabian Dobler. This thesis got started on behalf of Swisscom IT-Services AG Switzerland.

Basically the task was to create a method for encrypting a message in such way where different people would be able to read different amounts of the message depending on their security clearance (multilevel encryption). In fact the resulting solution does not quite follow this scheme but the same effect can be achieved by creating different groups for different levels.