Deutsche Telekom

About: Deutsche Telekom is a company organization based out in Welwyn Garden City, United Kingdom. It is known for research contribution in the topics: Telecommunications network & Terminal (electronics). The organization has 3473 authors who have published 5208 publications receiving 65429 citations. The organization is also known as: DTAG & German Telecom.

Jiminy: a scalable incentive-based architecture for improving rating quality

Abstract: In this paper we present the design, implementation, and evaluation of Jiminy: a framework for explicitly rewarding users who participate in reputation management systems by submitting ratings. To defend against participants who submit random or malicious ratings in order to accumulate rewards, Jiminy facilitates a probabilistic mechanism to detect dishonesty and halt rewards accordingly. Jiminy's reward model and honesty detection algorithm are presented and its cluster-based implementation is described. The proposed framework is evaluated using a large sample of real-world user ratings in order to demonstrate its effectiveness. Jiminy's performance and scalability are analysed through experimental evaluation. The system is shown to scale linearly with the on-demand addition of slave machines to the Jiminy cluster, allowing it to successfully process large problem spaces.

Does R&D-Infrastructure Attract High-Tech Start-Ups?

Abstract: Our research, based on the ZEW-Foundation Panel East, examines whether high-tech start-ups are mainly founded in scientific and infrastructural well suited regions or not. Estimation results on the level of postcode areas confirm the hypothesis that specific human capital, knowledge spillovers at higher-education institutions are more important for founding a firm in one of the high-tech sectors compared with the effects of other publicly financed institutions. The existence of large companies in the manufacturing sector has a considerable effect for start-up activities in this region in general. Moreover, high-tech start-ups are more concentrated within or near technology and foundation centres.

A malware detector placement game for intrusion detection

Abstract: We propose and investigate a game-theoretic approach to the malware filtering and detector placement problem which arises in network security. Our main objective is to develop optimal detector algorithms taking into account attacker strategies and actions. Assuming rational and intelligent attackers, we present a two-person zero-sum non-cooperative Markov security game framework as a basis for modeling the interaction between the attackers who generate malware traffic on a network and a corresponding intrusion detection system (IDS). Thus, we establish a formal model of the detector placement problem based on game theory and derive optimal strategies for both players. In addition, we test the strategies obtained in a realistic agent-based network simulation environment and compare the results of static and dynamic placement scenarios. The obtained IDS strategies and the corresponding simulation results provide interesting insights into how to optimally deploy malware detectors in a network environment.

System and Method for Securing A Credential Vault On A Trusted Computing Base

Abstract: A method for utilizing a secure credential vault on a mobile computing device includes: prompting a user for and receiving from the user a credential vault password; prompting a user for and receiving a near-field communication (NFC) security token from a NFC-enabled device; verifying the credential vault password and the received NFC security token; and opening a secure session with the secure credential vault in response to successful verification.