Situation-aware Adaptive Cryptography
Marc Truedsson, Viktor Hjelm · Lund University Publications Student Papers (Lund University) · 2018
The matter of security is often a trade-off between protection and performance.The fact that more and more small, battery powered and computationally weak devices are connected to the Internet, makes this matter more relevant than ever.Such devices could be smart-watches, smart smoke detectors, IP Cameras, etc.While some of these devices completely lack data protection, other devices have implemented classic security schemes which are not optimized for such devices.This thesis investigates the concept of situation-aware adaptive cryptography in an IP Camera, where different security schemes can be used depending on the current situation of a device.A number of different security schemes are implemented, tested and compared to each other.From this, different protection levels are proposed not only containing classic cryptographic functions but also lightweight cryptographic schemes specialized for this new type of small devices.Different parameter measurements, relevant for assessing the situation of a device, are also implemented and compared to each other in terms of power consumption, time, and data sent.Finally, the results from these two studies are put together into a complete concept solution, implementing the full situation-aware adaptive cryptography scheme.This particular implementation can save up to 53% of the power used for encryption and sending of data, in an average use case about 26% is saved.