As presented yesterday at the poster session, which was fun , here is the link to the web-based demo and some information.
Things That Think is the collective of mobile devices with computational power and storage capabilities. By combining these devices in a network of personal devices we can achieve threshold security. A honest majority of these devices can be used to access encrypted data or place signatures. The advantages are twofold: users do not need every device (dead battery, left at home, lost) and an adversary does not gain knowledge of the shared key if he did not compromise the threshold number of devices. This usabilty demo focusses on authorisation for resharing. Resharing is a mechanism that allows the user to add or remove a device from the set of personal devices, and to refresh security.