While by now feasible solutions to protect privacy for complex ubiquitous applications are available, very small devices, called context transponders (CTP) still lack resources to run sophisticated full scale approaches like DRM and strong encryption. These devices however, will play an important role in the success of ubiquitous computing as they support the idea of pervasiveness (small, mobile etc.). We propose a set of techniques outlined as the CTP-classmark that aims to introduce data avoidance and obfuscation strategies to enable information security in context aware applications. Using this classmark, the users' privacy can be protected even on low resource devices and hence the users' trust in ubicomp applications will rise.
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