187 citations · 732 across the 30 of their papers we have counts for
6 papers · 1 filter
The Boon and Bane of Cross-Signing: Shedding Light on a Common Practice in Public Key Infrastructures
Jens Hiller, Johanna Amann, Oliver Hohlfeld
Public Key Infrastructures (PKIs) with their trusted Certificate Authorities (CAs) provide the trust backbone for the Internet: CAs sign certificates which prove the identity of se…
The Lockdown Effect: Implications of the COVID-19 Pandemic on Internet Traffic
Anja Feldmann, Oliver Gasser, Franziska Lichtblau +9
Due to the COVID-19 pandemic, many governments imposed lock downs that forced hundreds of millions of citizens to stay at home. The implementation of confinement measures increased…
Corona-Warn-App: Tracing the Start of the Official COVID-19 Exposure Notification App for Germany
Jens Helge Reelfs, Oliver Hohlfeld, Ingmar Poese
On June 16, 2020, Germany launched an open-source smartphone contact tracing app ("Corona-Warn-App") to help tracing SARS-CoV-2 (coronavirus) infection chains. It uses a decentrali…
Word-Emoji Embeddings from large scale Messaging Data reflect real-world Semantic Associations of Expressive Icons
Jens Helge Reelfs, Oliver Hohlfeld, Markus Strohmaier +1
We train word-emoji embeddings on large scale messaging data obtained from the Jodel online social network. Our data set contains more than 40 million sentences, of which 11 millio…
Multi-episodic Perceived Quality of an Audio-on-Demand Service
Dennis Guse, Oliver Hohlfeld, Anna Wunderlich +2
QoE is traditionally evaluated by using short stimuli usually representing parts or single usage episodes. This opens the question on how the overall service perception involving m…
MUST, SHOULD, DON'T CARE: TCP Conformance in the Wild
Mike Kosek, Leo Blöcher, Jan Rüth +2
Standards govern the SHOULD and MUST requirements for protocol implementers for interoperability. In case of TCP that carries the bulk of the Internets' traffic, these requirements…