Logo des Repositoriums

Auflistung nach Autor:in "Kuperberg, Michael"

1 - 2 von 2
  • Konferenzbeitrag
    Automated benchmarking of Java APIs
    (Software Engineering 2010, 2010) Kuperberg, Michael; Omri, Fouad; Reussner, Ralf
    Performance is an extra-functional property of software systems which is often critical for achieving sufficient scalability or efficient resource utilisation. As many applications are built using application programmer interfaces (APIs) of execution platforms and external components, the performance of the used API implementations has a strong impact on the performance of the application itself. Yet the sheer size and complexity of today's APIs make it hard to manually benchmark them, while many semantical constraints and requirements (on method parameters, etc.) make it complicated to automate the creation of API benchmarks. Additionally, modern execution platforms such as the Java Virtual Machine perform extensive nondeterministic runtime optimisations, which need to be considered and quantified for realistic benchmarking. In this paper, we present an automated solution for benchmarking any large APIs that are written in the Java programming language, not just the Java Platform API. Our implementation induces the optimisations of the Just-In-Time compiler to obtain realistic benchmarking results. We evaluate the approach on a large subset of the Java Platform API exposed by the base libraries of the Java Virtual Machine.
  • Konferenzbeitrag
    Integration of Self-Sovereign Identity into Conventional Software using Established IAM Protocols: A Survey
    (Open Identity Summit 2022, 2022) Kuperberg, Michael; Klemens, Robin
    Self-Sovereign Identity (SSI) is an approach based on asymmetric cryptography and on decentralized, user-controlled exchange of signed assertions. Most SSI implementations are not based on hierarchic certification schemas, but rather on the peer-to-peer and distributed “web of trust” without root or intermediate CAs. As SSI is a nascent technology, the adoption of vendor-independent SSI standards into existing software landscapes is at an early stage. Conventional enterprise-grade IAM implementations and cloud-based Identity Providers rely on widely established pre-SSI standards, and both will not be replaced by SSI offerings in the next few years. The contribution of this paper is an analysis of patterns and products to bridge unmodified pre-SSI applications and conventional IAM with SSI implementations. Our analysis covers 40+ SSI implementations and major authentication protocols such as OpenID Connect and LDAP.