Motivated by recent revelations of widespread state surveillance of personal communication,
many solutions now claim to offer secure and private messaging. This includes both a large …

Analysis of Internet topologies has shown that the Internet topology has negative curvature,
measured by Gromov's “thin triangle condition”, which is tightly related to core congestion …

Trust Management (TM) systems for authentication are vital to the security of online
interactions, which are ubiquitous in our everyday lives. Various systems, like the Web PKI …

Email is one of the main communication tools and has seen significant adoption in the past
decades. However, emails are sent in plain text by default and allow attackers easy access …

In the wake of recent revelations of mass government surveillance, secure messaging
protocols have come under renewed scrutiny. A widespread weakness of existing solutions …

Abstract The Domain Name System (DNS) is vital for access to information on the Internet.
This makes it a target for attackers whose aim is to suppress free access to information. This …

Trustworthy digital communication requires the secure exchange of contact information, but
current approaches lack usability and scalability for larger groups of users. We evaluate the …

Since the emergence of the Bitcoin cryptocurrency, the blockchain technology has become
the new Internet tool with which researchers claim to be able to solve any existing online …

Over the years, the Internet has become a field in which a small number of large Internet
companies dominate most of the Internet services. As users get used to using their services …

Roughly four decades ago, Taher ElGamal put forward what is today one of the most widely
known and best understood public key encryption schemes. ElGamal encryption has been …