3 research outputs found
The UC approach: an application view
What kind of guidelines can the UC approach provide for traditional designs and applications? The aim of this report is to bring this theoretically rooted, computer scientist technology closer to the community of practitioners in the field of protocol designs
On Privacy Notions in Anonymous Communication
Many anonymous communication networks (ACNs) with different privacy goals
have been developed. However, there are no accepted formal definitions of
privacy and ACNs often define their goals and adversary models ad hoc. However,
for the understanding and comparison of different flavors of privacy, a common
foundation is needed. In this paper, we introduce an analysis framework for
ACNs that captures the notions and assumptions known from different analysis
frameworks. Therefore, we formalize privacy goals as notions and identify their
building blocks. For any pair of notions we prove whether one is strictly
stronger, and, if so, which. Hence, we are able to present a complete
hierarchy. Further, we show how to add practical assumptions, e.g. regarding
the protocol model or user corruption as options to our notions. This way, we
capture the notions and assumptions of, to the best of our knowledge, all
existing analytical frameworks for ACNs and are able to revise inconsistencies
between them. Thus, our new framework builds a common ground and allows for
sharper analysis, since new combinations of assumptions are possible and the
relations between the notions are known
Umsetzung des datenschutzrechtlichen Auskunftsanspruchs auf Grundlage von Usage-Control und Data-Provenance-Technologien
Die Komplexität moderner Informationssysteme erschwert die Nachvollziehbarkeit der Verarbeitung personenbezogener Daten. Der einzelne Bürger ist den Systemen quasi ausgeliefert. Das Datenschutzrecht versucht dem entgegenzuwirken. Ein Werkzeug des Datenschutzes zur Herstellung von Transparenz ist der Auskunftsanspruch. Diese Arbeit unterzieht das Recht auf Auskunft einer kritischen Würdigung und schafft umfassende technische Voraussetzungen für dessen Wahrnehmung