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University of Mannheim
(42 results)-
White Papers
As the Net Churns: Fast-Flux Botnet Observations
September 5, 2008, 12:00am PDT
While botnets themselves provide a rich platform for financial gain for the botnet master, the use of infected hosts as webservers can provide an additional botnet use. Botnet herders often use...
Provided by University of Mannheim
-
White Papers
Towards Next-Generation Botnets
October 7, 2008, 12:00am PDT
This paper introduces the design of an advanced bot called Rambot that is based on the weak nesses found when tracking a diverse set of botnets over a period of several months. The main features...
Provided by University of Mannheim
-
White Papers
Efficient Signal Strength Sampling for 802.11-Based Indoor Positioning Systems
January 9, 2008, 12:00am PST
The primary contribution of this paper is the novel Com-PoScan system that can mitigate the effect of scanning on concurrent communications. ComPoScan is based on movement detection to adaptively...
Provided by University of Mannheim
-
White Papers
Cooperative Intrusion Detection in Wireless Sensor Networks
November 28, 2008, 12:00am PST
It considered the problem of cooperative intrusion detection in wireless sensor networks where the nodes are equipped with local detector modules and have to identify the intruder in a distributed...
Provided by University of Mannheim
-
White Papers
Automatic Analysis of Malware Behavior Using Machine Learning
December 17, 2009, 12:00am PST
Malicious software - so called malware - poses a major threat to the security of computer systems. The amount and diversity of its variants render classic security defenses ineffective, such that...
Provided by University of Mannheim
-
White Papers
Literature Analysis: Business Analytics & Knowledge Discovery
March 4, 2010, 12:00am PST
One of today's biggest trends in information systems is Business Intelligence (BI). But while everybody talks about the term few people really grasp its contents. An illustrating example is a...
Provided by University of Mannheim
-
White Papers
Backpressure Multicast Congestion Control in Mobile Ad-Hoc Networks
October 18, 2007, 12:00am PDT
In mobile ad-hoc networks, the multicast paradigm is of central importance. It can help to save scarce medium bandwidth if packets are to be delivered to multiple destinations. The authors...
Provided by University of Mannheim
-
White Papers
A Graph Based Approach to Supporting Reconfiguration in Wireless Sensor Networks
September 12, 2009, 12:00am PDT
Considerable research has been performed in applying run-time reconfigurable component models to wireless sensor networks. The ability to dynamically deploy or update software components has clear...
Provided by University of Mannheim
-
White Papers
TeCo3D - A 3D Telecooperation Application Based on VRML and Java
November 7, 2007, 12:00am PST
In this paper the authors present a method for sharing collaboration-unaware VRML content, e.g. 3D models which were not specifically developed for use in a distributed environment. This...
Provided by University of Mannheim
-
White Papers
Wages And Productivity Growth In A Dynamic Oligopoly
November 1, 2009, 12:00am PDT
This paper studies the innovation dynamics of an oligopolistic industry. The firms compete not only in the output market but also by engaging in productivity enhancing innovations to reduce labor...
Provided by University of Mannheim
-
White Papers
A Dynamic Auction For Multiobject Procurement Under A Hard Budget Constraint
March 3, 2010, 12:00am PST
The authors present a new dynamic auction for procurement problems where payments are bounded by a hard budget constraint and money does not enter the procurer's objective function. A...
Provided by University of Mannheim
-
White Papers
Secure Multiparty Linear Programming Using Fixed-Point Arithmetic
November 2, 2010, 12:00am PDT
Collaborative optimization problems can often be modeled as a linear program whose objective function and constraints combine data from several parties. However, important applications of this...
Provided by University of Mannheim
-
White Papers
Integrating People-Centric Sensing With Social Networks: A Privacy Research Agenda
January 29, 2010, 12:00am PST
During the last few years there have been an increasing number of people-centric sensing projects, which combine location information with other sensors available on mobile devices, such as the...
Provided by University of Mannheim
-
White Papers
Towards Open-World Urban Sensing Applications
March 29, 2010, 12:00am PDT
All urban sensing applications today take a closed-world approach, where specific data sources are applied for a specific purpose. They are designed with specific input/output interfaces and build...
Provided by University of Mannheim
-
White Papers
Kernel-Level Interception and Applications on Mobile Devices
May 1, 2008, 12:00am PDT
The techniques of kernel-level system call interception are well known today for many different operating systems. This paper starts with transferring these techniques to the Windows CE type of...
Provided by University of Mannheim
-
White Papers
A Malware Instruction Set for Behavior-Based Analysis
January 7, 2010, 12:00am PST
The authors introduce a new representation for monitored behavior of malicious software called Malware Instruction SeT (MIST). The representation is optimized for effective and efficient analysis...
Provided by University of Mannheim
-
White Papers
Amun: Automatic Capturing of Malicious Software
July 15, 2010, 12:00am PDT
This paper describes the low-interaction server honeypot Amun. Through the use of emulated vulnerabilities Amun aims at capturing malware in an automated fashion. The use of the scripting language...
Provided by University of Mannheim
-
White Papers
Authenticated Query Flooding in Sensor Networks
January 1, 2011, 12:00am PST
The authors propose a novel mechanism for authentication of queries in a sensor network in case these queries are flooded. In the protocol, the base station appends an authenticator to every...
Provided by University of Mannheim
-
White Papers
Mobile Security Catching Up? Revealing the Nuts and Bolts of the Security of Mobile Devices
March 6, 2011, 12:00am PST
The authors are currently moving from the Internet society to a mobile society where more and more access to information is done by previously dumb phones. For example, the number of mobile phones...
Provided by University of Mannheim
-
White Papers
Towards Optimal Sensor Placement Strategies for Early Warning Systems
October 12, 2010, 12:00am PDT
A network early warning system consists of several distributed sensors to detect malicious network activity. The effectiveness of such early warning systems critically depends on the sensor...
Provided by University of Mannheim
-
White Papers
A Privacy-Maintaining Framework for Context-Sensitive Service Discovery Services
June 28, 2010, 12:00am PDT
Despite the rapid growth in the number of mobile devices connected to the internet via UMTS or wireless 802.11 hotspots the market for location-based services has yet to take off as expected....
Provided by University of Mannheim
-
White Papers
Financial Literacy And Mutual Fund Investments: Who Buys Actively Managed Funds?
April 1, 2010, 12:00am PDT
Previous research indicates that a lack of financial sophistication might explain the past strong growth in active management. The authors construct an objective financial literacy score and...
Provided by University of Mannheim
-
White Papers
Investing In Commodity Futures Markets: Can Spot Price Models Help?
November 1, 2008, 12:00am PDT
This paper empirically investigates whether continuous time spot price models are able to help to reveal mispriced commodity futures contracts. Mispricing are identified based on the difference...
Provided by University of Mannheim
-
White Papers
Compensating the Leakage Effect From Band-Limited Noise in DFT-Based Multi-Carrier Modulation
January 1, 2011, 12:00am PST
Orthogonal Frequency Division Multiplexing (OFDM) systems suffer from the low spectral selectivity of the Discrete Fourier Transform (DFT). External sources of interference generally do not only...
Provided by University of Mannheim
-
White Papers
Location Privacy in Urban Sensing Networks: Research Challenges and Directions
December 1, 2010, 12:00am PST
During the last few years there have been an increasing number of people-centric sensing projects. These combine location information with sensors available on mobile phones, giving birth to a...
Provided by University of Mannheim
-
White Papers
Unicast Ad-Hoc Routing in Vehicular City Scenarios
April 10, 2008, 12:00am PDT
Within Vehicular Ad-hoc NETworking (VANET), i.e., networking between radio-equipped vehicles, unicast packet forwarding can be separated into the one-dimensional highway case and the...
Provided by University of Mannheim
-
White Papers
Forking Agents in Sensor Networks
January 1, 2011, 12:00am PST
Information about local event is to be distributed by agents in a sensor network. The agents are sent out traveling hop-by-hop into random directions, leaving a path of information behind them in...
Provided by University of Mannheim
-
White Papers
Unequal Weighting for Improved Positioning in GPS-Less Sensor Networks
October 8, 2007, 12:00am PDT
Positioning can be done by means of triangulation in which triples of position-aware nodes estimate a neighbor's position with the help of distances. If a larger number of nodes exist, multiple...
Provided by University of Mannheim
-
White Papers
On-Demand Fingerprint Selection for 802.11-Based Positioning Systems
October 11, 2007, 12:00am PDT
Fingerprinting is a popular technology for 802.11- based positioning systems: Radio characteristics from different access points are measured at various positions and stored in a database. The...
Provided by University of Mannheim
-
White Papers
Energy-Efficient Aggregation Forwarding for Wireless Sensor Networks
June 27, 2007, 12:00am PDT
Based on an energy efficiency metric that is defined by the fraction of end-to-end delivery ratio and required energy, the authors propose a new distributed algorithm for the case of correlated...
Provided by University of Mannheim
-
White Papers
Deployment, Calibration, and Measurement Factors for Position Errors in 802.11-Based Indoor Positioning Systems
July 4, 2007, 12:00am PDT
Indoor positioning systems based on 802.11 and fingerprints offer reasonably low position errors. The authors study the deployment, calibration, and measurement factors for position errors by...
Provided by University of Mannheim
-
White Papers
Scalable Position-Based Multicast for Mobile Ad-Hoc Networks
January 1, 2008, 12:00am PST
This paper presents Scalable Position-Based Multicast (SPBM), a multicast routing protocol for ad-hoc networks. SPBM uses the geographic position of nodes to provide a highly scalable group...
Provided by University of Mannheim
-
White Papers
Measurements and Mitigation of Peer-to-Peer-Based Botnets: A Case Study on Storm Worm
February 18, 2008, 12:00am PST
Botnets, i.e., networks of compromised machines under a common control infrastructure, are commonly controlled by an attacker with the help of a central server: all compromised machines connect to...
Provided by University of Mannheim
-
White Papers
Towards an Authentication Service for Peer-to-Peer Based Massively Multiuser Virtual Environments
February 15, 2008, 12:00am PST
In this paper, the authors propose a distributed authentication service for Peer-To-Peer (P2P) based massively multiuser virtual environments. Such a service is necessary to provide security, e.g....
Provided by University of Mannheim
-
White Papers
Challenges for Selecting Optimal Coordinators in Peer-to-Peer-Based Massively Multi-User Virtual Environments
May 17, 2011, 12:00am PDT
Peer-to-Peer-based Massively Multi-user Virtual Environments (P2P-MMVEs) often use coordinator peers to enhance the system's capabilities. The success of this approach depends on selecting...
Provided by University of Mannheim
-
White Papers
Towards an Interest Management Scheme for Peer-Based Virtual Environments
January 15, 2009, 12:00am PST
A fundamental task in peer-to-peer-based Massively Multiuser Virtual Environments is providing all peers with a consistent view of the environment. To do so, state changes must be propagated to...
Provided by University of Mannheim
-
White Papers
Bootstrapping in Peer-to-Peer Systems
December 4, 2008, 12:00am PST
Peer-to-Peer systems have become a substantial element in computer networking. Distributing the load and splitting complex tasks are only some reasons why many developers have come to adopt this...
Provided by University of Mannheim
-
White Papers
Adaptive Update Propagation for Low-Latency Massively Multi-User Virtual Environments
March 26, 2009, 12:00am PDT
Massively Multi-User Virtual Environments (MMVEs) are highly interactive systems. They require the propagation of state updates to users with little delay. In this paper, the authors propose a...
Provided by University of Mannheim
-
White Papers
Measurements and Mitigation of Peer-to-Peer-Based Botnets: A Case Study on StormWorm
April 4, 2008, 12:00am PDT
Botnets, i.e., networks of compromised machines under a common control infrastructure, are commonly controlled by an attacker with the help of a central server: all compromised machines connect to...
Provided by University of Mannheim
-
Whitepapers
Detecting Hidden Storage Side Channel Vulnerabilities in Networked Applications
May 19, 2011, 12:00am PDT
Side channels are communication channels that were not intended for communication and that accidentally leak information. A storage side channel leaks information through the content of the...
Provided by University of Mannheim
-
Whitepapers
Modular Consensus Algorithms for the Crash-Recovery Model
September 21, 2009, 12:00am PDT
In the crash-recovery failure model of asynchronous distributed systems, processes can temporarily stop to execute steps and later restart their computation from a predefined local state. The...
Provided by University of Mannheim
-
Whitepapers
An Efficient Mitigation Method for Timing Side Channels on the Web
February 11, 2011, 12:00am PST
Research has shown that timing side channels exist in web applications. An obvious, but problematic, mitigation for timing attacks is to delay the execution time to the worst case execution time,...
Provided by University of Mannheim
-
Whitepapers
Detecting Hidden Storage Side Channel Vulnerabilities in Networked Applications
May 19, 2011, 12:00am PDT
Side channels are communication channels that were not intended for communication and that accidentally leak information. A storage side channel leaks information through the content of the...
Provided by University of Mannheim
-
White Papers
Measurements and Mitigation of Peer-to-Peer-Based Botnets: A Case Study on StormWorm
April 4, 2008, 12:00am PDT
Botnets, i.e., networks of compromised machines under a common control infrastructure, are commonly controlled by an attacker with the help of a central server: all compromised machines connect to...
Provided by University of Mannheim
-
White Papers
Adaptive Update Propagation for Low-Latency Massively Multi-User Virtual Environments
March 26, 2009, 12:00am PDT
Massively Multi-User Virtual Environments (MMVEs) are highly interactive systems. They require the propagation of state updates to users with little delay. In this paper, the authors propose a...
Provided by University of Mannheim
-
White Papers
Bootstrapping in Peer-to-Peer Systems
December 4, 2008, 12:00am PST
Peer-to-Peer systems have become a substantial element in computer networking. Distributing the load and splitting complex tasks are only some reasons why many developers have come to adopt this...
Provided by University of Mannheim
-
White Papers
Towards an Interest Management Scheme for Peer-Based Virtual Environments
January 15, 2009, 12:00am PST
A fundamental task in peer-to-peer-based Massively Multiuser Virtual Environments is providing all peers with a consistent view of the environment. To do so, state changes must be propagated to...
Provided by University of Mannheim
-
White Papers
Challenges for Selecting Optimal Coordinators in Peer-to-Peer-Based Massively Multi-User Virtual Environments
May 17, 2011, 12:00am PDT
Peer-to-Peer-based Massively Multi-user Virtual Environments (P2P-MMVEs) often use coordinator peers to enhance the system's capabilities. The success of this approach depends on selecting...
Provided by University of Mannheim
-
White Papers
Towards an Authentication Service for Peer-to-Peer Based Massively Multiuser Virtual Environments
February 15, 2008, 12:00am PST
In this paper, the authors propose a distributed authentication service for Peer-To-Peer (P2P) based massively multiuser virtual environments. Such a service is necessary to provide security, e.g....
Provided by University of Mannheim
-
White Papers
Deployment, Calibration, and Measurement Factors for Position Errors in 802.11-Based Indoor Positioning Systems
July 4, 2007, 12:00am PDT
Indoor positioning systems based on 802.11 and fingerprints offer reasonably low position errors. The authors study the deployment, calibration, and measurement factors for position errors by...
Provided by University of Mannheim
-
White Papers
Energy-Efficient Aggregation Forwarding for Wireless Sensor Networks
June 27, 2007, 12:00am PDT
Based on an energy efficiency metric that is defined by the fraction of end-to-end delivery ratio and required energy, the authors propose a new distributed algorithm for the case of correlated...
Provided by University of Mannheim
-
White Papers
On-Demand Fingerprint Selection for 802.11-Based Positioning Systems
October 11, 2007, 12:00am PDT
Fingerprinting is a popular technology for 802.11- based positioning systems: Radio characteristics from different access points are measured at various positions and stored in a database. The...
Provided by University of Mannheim
-
White Papers
Unequal Weighting for Improved Positioning in GPS-Less Sensor Networks
October 8, 2007, 12:00am PDT
Positioning can be done by means of triangulation in which triples of position-aware nodes estimate a neighbor's position with the help of distances. If a larger number of nodes exist, multiple...
Provided by University of Mannheim
-
White Papers
Forking Agents in Sensor Networks
January 1, 2011, 12:00am PST
Information about local event is to be distributed by agents in a sensor network. The agents are sent out traveling hop-by-hop into random directions, leaving a path of information behind them in...
Provided by University of Mannheim
-
White Papers
Unicast Ad-Hoc Routing in Vehicular City Scenarios
April 10, 2008, 12:00am PDT
Within Vehicular Ad-hoc NETworking (VANET), i.e., networking between radio-equipped vehicles, unicast packet forwarding can be separated into the one-dimensional highway case and the...
Provided by University of Mannheim
-
White Papers
Location Privacy in Urban Sensing Networks: Research Challenges and Directions
December 1, 2010, 12:00am PST
During the last few years there have been an increasing number of people-centric sensing projects. These combine location information with sensors available on mobile phones, giving birth to a...
Provided by University of Mannheim
-
White Papers
Compensating the Leakage Effect From Band-Limited Noise in DFT-Based Multi-Carrier Modulation
January 1, 2011, 12:00am PST
Orthogonal Frequency Division Multiplexing (OFDM) systems suffer from the low spectral selectivity of the Discrete Fourier Transform (DFT). External sources of interference generally do not only...
Provided by University of Mannheim
-
White Papers
Investing In Commodity Futures Markets: Can Spot Price Models Help?
November 1, 2008, 12:00am PDT
This paper empirically investigates whether continuous time spot price models are able to help to reveal mispriced commodity futures contracts. Mispricing are identified based on the difference...
Provided by University of Mannheim
-
White Papers
Financial Literacy And Mutual Fund Investments: Who Buys Actively Managed Funds?
April 1, 2010, 12:00am PDT
Previous research indicates that a lack of financial sophistication might explain the past strong growth in active management. The authors construct an objective financial literacy score and...
Provided by University of Mannheim
-
White Papers
A Privacy-Maintaining Framework for Context-Sensitive Service Discovery Services
June 28, 2010, 12:00am PDT
Despite the rapid growth in the number of mobile devices connected to the internet via UMTS or wireless 802.11 hotspots the market for location-based services has yet to take off as expected....
Provided by University of Mannheim
-
White Papers
Towards Optimal Sensor Placement Strategies for Early Warning Systems
October 12, 2010, 12:00am PDT
A network early warning system consists of several distributed sensors to detect malicious network activity. The effectiveness of such early warning systems critically depends on the sensor...
Provided by University of Mannheim
-
White Papers
Mobile Security Catching Up? Revealing the Nuts and Bolts of the Security of Mobile Devices
March 6, 2011, 12:00am PST
The authors are currently moving from the Internet society to a mobile society where more and more access to information is done by previously dumb phones. For example, the number of mobile phones...
Provided by University of Mannheim
-
White Papers
Authenticated Query Flooding in Sensor Networks
January 1, 2011, 12:00am PST
The authors propose a novel mechanism for authentication of queries in a sensor network in case these queries are flooded. In the protocol, the base station appends an authenticator to every...
Provided by University of Mannheim
-
White Papers
Amun: Automatic Capturing of Malicious Software
July 15, 2010, 12:00am PDT
This paper describes the low-interaction server honeypot Amun. Through the use of emulated vulnerabilities Amun aims at capturing malware in an automated fashion. The use of the scripting language...
Provided by University of Mannheim
-
White Papers
A Malware Instruction Set for Behavior-Based Analysis
January 7, 2010, 12:00am PST
The authors introduce a new representation for monitored behavior of malicious software called Malware Instruction SeT (MIST). The representation is optimized for effective and efficient analysis...
Provided by University of Mannheim
-
White Papers
Kernel-Level Interception and Applications on Mobile Devices
May 1, 2008, 12:00am PDT
The techniques of kernel-level system call interception are well known today for many different operating systems. This paper starts with transferring these techniques to the Windows CE type of...
Provided by University of Mannheim
-
White Papers
Towards Open-World Urban Sensing Applications
March 29, 2010, 12:00am PDT
All urban sensing applications today take a closed-world approach, where specific data sources are applied for a specific purpose. They are designed with specific input/output interfaces and build...
Provided by University of Mannheim
-
White Papers
Integrating People-Centric Sensing With Social Networks: A Privacy Research Agenda
January 29, 2010, 12:00am PST
During the last few years there have been an increasing number of people-centric sensing projects, which combine location information with other sensors available on mobile devices, such as the...
Provided by University of Mannheim
-
White Papers
Secure Multiparty Linear Programming Using Fixed-Point Arithmetic
November 2, 2010, 12:00am PDT
Collaborative optimization problems can often be modeled as a linear program whose objective function and constraints combine data from several parties. However, important applications of this...
Provided by University of Mannheim
-
White Papers
A Dynamic Auction For Multiobject Procurement Under A Hard Budget Constraint
March 3, 2010, 12:00am PST
The authors present a new dynamic auction for procurement problems where payments are bounded by a hard budget constraint and money does not enter the procurer's objective function. A...
Provided by University of Mannheim
-
White Papers
Wages And Productivity Growth In A Dynamic Oligopoly
November 1, 2009, 12:00am PDT
This paper studies the innovation dynamics of an oligopolistic industry. The firms compete not only in the output market but also by engaging in productivity enhancing innovations to reduce labor...
Provided by University of Mannheim
-
White Papers
TeCo3D - A 3D Telecooperation Application Based on VRML and Java
November 7, 2007, 12:00am PST
In this paper the authors present a method for sharing collaboration-unaware VRML content, e.g. 3D models which were not specifically developed for use in a distributed environment. This...
Provided by University of Mannheim
-
White Papers
A Graph Based Approach to Supporting Reconfiguration in Wireless Sensor Networks
September 12, 2009, 12:00am PDT
Considerable research has been performed in applying run-time reconfigurable component models to wireless sensor networks. The ability to dynamically deploy or update software components has clear...
Provided by University of Mannheim
-
White Papers
Backpressure Multicast Congestion Control in Mobile Ad-Hoc Networks
October 18, 2007, 12:00am PDT
In mobile ad-hoc networks, the multicast paradigm is of central importance. It can help to save scarce medium bandwidth if packets are to be delivered to multiple destinations. The authors...
Provided by University of Mannheim
-
White Papers
Literature Analysis: Business Analytics & Knowledge Discovery
March 4, 2010, 12:00am PST
One of today's biggest trends in information systems is Business Intelligence (BI). But while everybody talks about the term few people really grasp its contents. An illustrating example is a...
Provided by University of Mannheim
-
White Papers
Automatic Analysis of Malware Behavior Using Machine Learning
December 17, 2009, 12:00am PST
Malicious software - so called malware - poses a major threat to the security of computer systems. The amount and diversity of its variants render classic security defenses ineffective, such that...
Provided by University of Mannheim
-
White Papers
Cooperative Intrusion Detection in Wireless Sensor Networks
November 28, 2008, 12:00am PST
It considered the problem of cooperative intrusion detection in wireless sensor networks where the nodes are equipped with local detector modules and have to identify the intruder in a distributed...
Provided by University of Mannheim
-
White Papers
Efficient Signal Strength Sampling for 802.11-Based Indoor Positioning Systems
January 9, 2008, 12:00am PST
The primary contribution of this paper is the novel Com-PoScan system that can mitigate the effect of scanning on concurrent communications. ComPoScan is based on movement detection to adaptively...
Provided by University of Mannheim
-
White Papers
Towards Next-Generation Botnets
October 7, 2008, 12:00am PDT
This paper introduces the design of an advanced bot called Rambot that is based on the weak nesses found when tracking a diverse set of botnets over a period of several months. The main features...
Provided by University of Mannheim
-
White Papers
As the Net Churns: Fast-Flux Botnet Observations
September 5, 2008, 12:00am PDT
While botnets themselves provide a rich platform for financial gain for the botnet master, the use of infected hosts as webservers can provide an additional botnet use. Botnet herders often use...
Provided by University of Mannheim
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