Matthias Babel

University of Bayreuth · Institute for Computer Science

The financial sector has seen a trend toward more decentralization, especially led by the introduction and prevalence of blockchain. However, decentralization technologies may increase energy consumption through the use of potentially less optimized hardware, replication, and consensus-related operations, as well as further cryptographic overhead w...

Research on blockchain has found that the technology is no silver bullet compared to traditional data structures due to limitations regarding decentralization, security, and scalability. These limitations are summarized in the blockchain trilemma, which today represents the greatest barrier to blockchain adoption and applicability. To address these...

Zusammenfassung Die Vernetzung kommunikationsfähiger Geräte schreitet aktuell schnell voran und verspricht durch eine Ende-zu-Ende-Digitalisierung von Prozessen Effizienzgewinne und neue Anwendungsmöglichkeiten. Die Verifizierung von Endgeräten ist insbesondere bei kritischen Infrastrukturen wie der Energieversorgung eine notwendige Bedingung. Unte...

Today, digital identity management for individuals is either inconvenient and error-prone or creates undesirable lock-in effects and violates privacy and security expectations. These shortcomings inhibit the digital transformation in general and seem particularly concerning in the context of novel applications such as access control for decentraliz...

In the energy transition, there is an urgent need for decreasing overall carbon emissions. Against this background, the purposeful and verifiable tracing of emissions in the energy system is a crucial key element for promoting the deep decarbonization towards a net zero emission economy with a market-based approach. Such an effective tracing system...

Analyses that fulfill differential privacy provide plausible deniability to individuals while allowing analysts to extract insights from data. However, beyond an often acceptable accuracy tradeoff, these statistical disclosure techniques generally inhibit the verifiability of the provided information, as one cannot check the correctness of the part...

Most central banks in advanced economies consider issuing central bank digital currencies (CBDCs) to address the declining use of cash and to position themselves against increased competition from Big Tech companies, cryptocurrencies, and stablecoins. One crucial design dimension of a CBDC system is the degree of transaction privacy. Existing solut...

Digitalisierung in der Justiz-Vertrauen in digitale Dokumente durch Blockchain-Technologie Digitale Technologien ermöglichen es, viele bislang aufwendige papierbasierte Prozesse zu optimieren. Der Optimierungsprozess ist jedoch meist mit der Heraus-forderung verbunden, dass digitale Dokumente im Gegensatz zu ihren papier-basierten Pendants deutlich...