Joining a private Wi-Fi network is an intricate operation for end users, especially when they must type a long and complicated password in order to gain access. Moreover, it is often the case where users connect to multiple such hotspots, placed in public places visited in their daily routine, further exacerbating the issue. In this paper we present WPA-Totem: a small device that emits Wi-Fi co...

AbstractWe introduce a new approach to image forensics: placing physical refractive objects, which we call totems, into scene so as protect any photograph taken of that scene. Totems bend and redirect light rays, thus providing multiple, albeit distorted, views the within single image. A defender can use these distorted totem pixels detect if an has been manipulated. Our unscrambles rays passin...

FPGAs have an important role to play in System-on-a-Chip (SoC) designs by providing programmable hardware resources within complex ASIC designs. However, because the FPGA logic is custom-fabricated with the overall SoC, we have an opportunity to optimize that logic to the SoC’s specific needs. This gave rise to the Totem Project, which automates the creation of domain-specific reconfigurable lo...

For fault-tolerant real-time distributed systems, the probability that a message is not delivered within its real-time deadline must be small enough that it does not adversely aaect system reliability. We investigate the delivery of messages for the Totem Protocol, a reliable ordered broadcast protocol that we have developed for fault-tolerant distributed systems with physical broadcasts over a...