@article{LiskeRebensburgSchnor2007,
  author    = {Liske, Stefan and Rebensburg, Klaus and Schnor, Bettina},
  title     = {SPIT-Erkennung, -Bekanntgabe und -Abwehr in SIP-Netzwerken},
  isbn      = {978-3-540-69961-3},
  year      = {2007},
  abstract  = {SPAM ist in den letzten Jahren zur großten Bedrohung der E-Mail-Kommunikation herangewachsen - jedoch nicht nur auf diesen Kommunikationsweg beschrankt. Mit steigender Anzahl von VoIP-Anschl{\"u}ssen werden auch hier die teilnehmenden Benutzer mit SPAM-Anrufen (SPIT) konfrontiert werden. Neben derzeit diskutierten juristischen Maßnahmen m{\"u}ssen auch technische Abwehrmaßnahmen geschaffen werden, welche SPAM erkennen und vermeiden k{\"o}nnen. Dieser Beitrag stellt zwei Erweiterungen f{\"u}r das VoIP-Protokoll SIP vor, welche es erstens den Providern erm{\"o}glichen, SPIT-Einsch{\"a}tzungen {\"u}ber den Anrufer zum angerufenen Benutzer zu {\"u}bermitteln und zweitens den Angerufenen die M{\"o}glichkeit geben, mit einer Kostenanforderung auf potentielle SPIT-Anrufe zu reagieren.},
  language  = {de}
}
@article{FriedrichSchneidenbachSchnor2005,
  author    = {Friedrich, Sven and Schneidenbach, Lars and Schnor, Bettina},
  title     = {SLIBNet : Server Load Balancing for InfiniBand Networks},
  year      = {2005},
  abstract  = {Today, InfiniBand is an evolving high speed interconnect technology to build high performance computing clusters, that achieve top 10 rankings in the current top 500 of the worldwide fastest supercomputers. Network interfaces (called host channel adapters) provide transport layer services over connections and datagrams in reliable or unreliable manner. Additionally, InfiniBand supports remote direct memory access (RDMA) primitives that allow for one- sided communication. Using server load balancing together with a high performance cluster makes it possible to build a fast, scalable, and reliable service infrastructure. We have designed and implemented a scalable load balancer for InfiniBand clusters called SLIBNet. Our investigations show that the InfiniBand architecture offers features which perfectly support load balancing. We want to thank the Megware Computer GmbH for providing us an InfiniBand switch to realize a server load balancing testbed.},
  language  = {en}
}
@book{Schnor2004,
  author    = {Schnor, Bettina},
  title     = {Seminarband: Sensornetze},
  series = {Technischer Bericht},
  journal   = {Technischer Bericht},
  publisher = {Universit{\"a}t Potsdam, Institut f{\"u}r Informatik},
  address   = {Potsdam},
  issn      = {0946-7580},
  year      = {2004},
  language  = {de}
}
@article{JungKiertscherMenskietal.2015,
  author    = {Jung, J{\"o}rg and Kiertscher, Simon and Menski, Sebastian and Schnor, Bettina},
  title     = {Self-Adapting Load Balancing for DNS},
  series = {Journal of networks},
  volume    = {10},
  journal   = {Journal of networks},
  number    = {4},
  publisher = {Kluwer Academic Publishers},
  address   = {Oulu},
  doi       = {10.1109/SPECTS.2014.6879994},
  pages     = {222 -- 231},
  year      = {2015},
  abstract  = {The Domain Name System belongs to the core services of the Internet infrastructure. Hence, DNS availability and performance is essential for the operation of the Internet and replication as well as load balancing are used for the root and top level name servers. This paper proposes an architecture for credit based server load balancing (SLB) for DNS. Compared to traditional load balancing algorithms like round robin or least connection, the benefit of credit based SLB is that the load balancer can adapt more easily to heterogeneous load requests and back end server capacities. The challenge of this approach is the definition of a suited credit metric. While this was done before for TCP based services like HTTP, the problem was not solved for UDP based services like DNS. In the following an approach is presented to define credits also for UDP based services. This UDP/DNS approach is implemented within the credit based SLB implementation salbnet. The presented measurements confirm the benefit of the self-adapting credit based SLB approach. In our experiments, the mean (first) response time dropped significantly compared to weighted round robin (WRR) (from over 4 ms to about 0.6 ms for dynamic pressure relieve (DPR)).},
  language  = {en}
}
@article{SchefflerSchnor2004,
  author    = {Scheffler, Thomas and Schnor, Bettina},
  title     = {Securing Next generation Mobile Networks},
  isbn      = {0-86341-388-9},
  year      = {2004},
  language  = {en}
}
@article{JeskeLuckowSchnor2007,
  author    = {Jeske, Janin and Luckow, Andr{\´e} and Schnor, Bettina},
  title     = {Reservation-based Resource-Brokering for Grid Computing},
  year      = {2007},
  abstract  = {In this paper we present the design and implementation of the Migol brokering framework. Migol is a Grid middleware, which addresses the fault-tolerance of long-running and compute-intensive applications. The framework supports e. g. the automatic and transparent recovery respectively the migration of applications. Another core feature of Migol is the discovery, selection, and allocation of resources using advance reservation. Grid broker systems can significantly benefit from advance reservation. With advance reservation brokers and users can obtain execution guarantees from local resource management systems (LRM) without requiring detailed knowledge of current and future workloads or of the resource owner's policies. Migol's Advance Reservation Service (ARS) provides an adapter layer for reservation capabilities of different LRMs, which is currently not provided by existing Grid middleware platforms. Further, we propose a shortest expected delay (SED) strategy for scheduling of advance reservations within the Job Broker Service. SED needs information about the earliest start time of an application. This is currently not supported by LRMs. We added this feature for PBSPro. Migol depends on Globus and its security infrastructure. Our performance experiments show the substantial overhead of this serviceoriented approach.},
  language  = {en}
}
@article{SchefflerSchnor2005,
  author    = {Scheffler, Thomas and Schnor, Bettina},
  title     = {Privacy Requirements for Embedded Sensor Devices},
  isbn      = {978-3-800729-09-8},
  year      = {2005},
  abstract  = {This paper analyses data privacy issues as they arise from different deployment scenarios for networks that use embedded sensor devices. Maintaining data privacy in pervasive environments requires the management and implementation of privacy protection measures close to the data source. We propose a set of atomic privacy parameters that is generic enough to form specific privacy classes and might be applied directly at the embedded sensor device.},
  language  = {en}
}
@book{FeiderSchnor2004,
  author    = {Feider, Henryk and Schnor, Bettina},
  title     = {PCG-Agreement Dokument},
  series = {Technischer Bericht},
  journal   = {Technischer Bericht},
  publisher = {Universit{\"a}t Potsdam, Institut f{\"u}r Informatik},
  address   = {Potsdam},
  issn      = {0946-7580},
  year      = {2004},
  language  = {de}
}
@misc{SahlmannClemensNowaketal.2020,
  author    = {Sahlmann, Kristina and Clemens, Vera and Nowak, Michael and Schnor, Bettina},
  title     = {MUP},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {1094},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-48901},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-489013},
  pages     = {23},
  year      = {2020},
  abstract  = {Message Queuing Telemetry Transport (MQTT) is one of the dominating protocols for edge- and cloud-based Internet of Things (IoT) solutions. When a security vulnerability of an IoT device is known, it has to be fixed as soon as possible. This requires a firmware update procedure. In this paper, we propose a secure update protocol for MQTT-connected devices which ensures the freshness of the firmware, authenticates the new firmware and considers constrained devices. We show that the update protocol is easy to integrate in an MQTT-based IoT network using a semantic approach. The feasibility of our approach is demonstrated by a detailed performance analysis of our prototype implementation on a IoT device with 32 kB RAM. Thereby, we identify design issues in MQTT 5 which can help to improve the support of constrained devices.},
  language  = {en}
}
@article{SahlmannClemensNowaketal.2020,
  author    = {Sahlmann, Kristina and Clemens, Vera and Nowak, Michael and Schnor, Bettina},
  title     = {MUP},
  series = {Sensors},
  volume    = {21},
  journal   = {Sensors},
  number    = {1},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {1424-8220},
  doi       = {10.3390/s21010010},
  pages     = {21},
  year      = {2020},
  abstract  = {Message Queuing Telemetry Transport (MQTT) is one of the dominating protocols for edge- and cloud-based Internet of Things (IoT) solutions. When a security vulnerability of an IoT device is known, it has to be fixed as soon as possible. This requires a firmware update procedure. In this paper, we propose a secure update protocol for MQTT-connected devices which ensures the freshness of the firmware, authenticates the new firmware and considers constrained devices. We show that the update protocol is easy to integrate in an MQTT-based IoT network using a semantic approach. The feasibility of our approach is demonstrated by a detailed performance analysis of our prototype implementation on a IoT device with 32 kB RAM. Thereby, we identify design issues in MQTT 5 which can help to improve the support of constrained devices.},
  language  = {en}
}