X-pire 2.0
Michael Backes, Sebastian Gerling, Stefan Lorenz, Stephan Lukas · 2014
During the last decade, social networks' free dissemination of personal information has reached a wide acceptance. Most of today's Internet users, especially teenagers, publish various kinds of sensitive information, without realizing that this information is preserved and might be detrimental to their future life and career. We present X-pire 2.0, which overcomes this unsatisfactory situation and puts users back in control of their published data. X-pire 2.0 is the first system that provides a digital expiration date and integrates robust protection against attackers creating digital copies of content before the expiration date has been reached. Our system leverages state-of-the-art trusted computing technologies and seamlessly integrates into the existing infrastructure on the Internet. X-pire 2.0 allows to add and enforce a digital expiration date on images that can be uploaded to existing social networks, since our enforcement is even robust against image recompression during upload. We implemented X-pire 2.0 for Android and show its practicality by publishing protected images in Google+ and Flickr.