Bit coin is the first digital currency to see widespread adoption. While payments are
conducted between pseudonyms, Bit coin cannot offer strong privacy guarantees: payment …

Bitcoin is the first e-cash system to see widespread adoption. While Bitcoin offers the
potential for new types of financial interaction, it has significant limitations regarding privacy. …

We describe Charm, an extensible framework for rapidly prototyping cryptographic systems.
Charm provides a number of features that explicitly support the development of new …

Anonymous credentials provide a powerful tool for making assertions about identity while
maintaining privacy. However, a limitation of today's anonymous credential systems is the …

Decentralized ledger-based currencies such as Bitcoin provide a means to construct payment
systems without requiring a trusted bank. Removing this trust assumption comes at the …

Frequently, users on the web need to show that they are, for example, not a robot, old enough
to access an age restricted video, or eligible to download an ebook from their local public …

In December 2015, Juniper Networks announced multiple security vulnerabilities stemming
from unauthorized code in ScreenOS, the operating system for their NetScreen VPN routers. …

Micro-mobility is a fast-growing trend in the trans-portation industry with stand-up electric
scooters (e-scooters) becoming increasingly popular in the United States. To date, up to 350 …

Apple’s iMessage is one of the most widely-deployed end-to-end encrypted messaging
protocols. Despite its broad deployment, the encryption protocols used by iMessage have never …

Despite recent high-profile attacks on the RC4 algorithm in TLS, its usage is still running at
about 30% of all TLS traffic. We provide new attacks against RC4 in TLS that are focussed on …