Based on the FOCUS theory of distributed systems (see [Broy, Stølen 01]) that are composed of interacting components we introduce a formal model of services and layered architectu...
Constructions of cryptographic primitives based on general assumptions (e.g., one-way functions) tend to be less efficient than constructions based on specific (e.g., number-theor...
We construct the first general secure computation protocols that require no trusted infrastructure other than authenticated communication, and that satisfy a meaningful notion of s...
We propose and explore a formal approach for black-box testing asynchronously communicating components in open environments. Asynchronicity poses a challenge for validating and tes...
Immo Grabe, Marcel Kyas, Martin Steffen, Arild B. ...