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- Fighting Spam With the NeighborhoodWatch DHT
- This paper presents DHTBL, an anti-spam blacklist built upon a novel secure Distributed Hash Table DHT. They show how DHTBL can be used to replace existing DNS-based Blacklists DNSBLs of IP addresses of mail relays that forward spam. Implementing a blacklist on a DHT improves resilience to DoS attacks and...
- Tags: University Of Maryland, Blacklist, NeighborhoodWatch DHT, Domain Names, Peer To Peer (P2P), Spam, Security, Networking, Internet, Spam And Phishing
- White papers 2009-01-19
- Flying robots based on birds and insects
- A team of engineers at the University of Maryland specializing in flight and navigation, is turning to biology for inspiration to protect troops as the military's role in international dealings has increased. According to the team leader, the key to ensuring troops' protection lies in the study of birds and...
- Tags: Team, Troop, Robots, Team Management, Emerging Technologies, Management, Roland Piquepaille, University Of Maryland, Biology, Humbert
- Blog posts 2008-11-09
- Evaluating Attack Resiliency for Host Intrusion Detection Systems
- Host Intrusion Detection Systems HIDSs are important tools used to provide security to computer systems. Many HIDSs exist and security practitioners need a way to determine the optimal security solution for their environment. Current evaluations of HIDSs focus on detection accuracy and typically do not account for the possibility that...
- Tags: University Of Maryland, Intrusion Detection System, HIDS, Intrusion Detection, Security, Network Security, Networking
- White papers 2008-04-01
- Link Mining: A New Data Mining Challenge
- A key challenge for data mining is tackling the problem of mining richly structured datasets, where the objects are linked in some way. Links among the objects may demonstrate certain patterns, which can be helpful for many data mining tasks and are usually hard to capture with traditional statistical models....
- Tags: University Of Maryland, Data Mining, Business Intelligence, Marketing Research, Databases, Enterprise Software, Software, Data Management, Marketing
- White papers 2008-01-01
- Illustration-Inspired Techniques for Visualizing Time-Varying Data
- Traditionally, time-varying data has been visualized using snapshots of the individual time steps or an animation of the snapshots shown in a sequential manner. For larger datasets with many time-varying features, animation can be limited in its use, as an observer can only track a limited number of features over...
- Tags: University Of Maryland, Animation, Snapshot, Speedlines, Productivity
- White papers 2008-01-01
- Preventing Distributed Denial of Service Attacks by Perturbing TCP Traffic
- This paper discusses a method for preventing Distributed Denial of Service DDoS attacks that use spoofed source IP addresses by monitoring TCP traffic. The method requires dropping TCP packets from client to server and monitoring the effect of the dropped packet. The goal is to develop software that an organization...
- Tags: University Of Maryland, TCP, Distributed Denial Of Service, Attack, Tcp/Ip, Networking, Security
- White papers 2008-01-01
- NUMA-Aware Java Heaps for Server Applications
- This paper introduces a set of techniques to both measure and optimize memory access locality of Java applications running on cc-NUMA servers. These techniques work at the object level and use information gathered from embedded hardware performance monitors. They propose a new NUMA-aware Java heap layout. In addition, they propose...
- Tags: Technique, Aware, University Of Maryland, Server, Performance Monitoring, NUMA, Productivity, Programming Languages, Performance Management, Java, Software Development, Software/Web Development, Human Resources, Workforce Management
- White papers 2008-01-01
- Sprint Helps the University of Maryland Eastern Shore Connect With Students
- With over 4,000 students attending classes across a 747-acre campus, the faculty, staff and administration of University of Maryland Eastern Shore UMES wanted to improve communications with the student body. In past decades, UMES, like most universities, relied on a campus-wide landline phone system to contact students. With such systems,...
- Tags: Phone, University Of Maryland, Sprint Communications, Telecom & Utilities
- Case studies 2007-12-20
- Evaluating Host Intrusion Detection Systems.
- Host Intrusion Detection Systems HIDSs are critical tools needed to provide indepth security to computer systems. Quantitative metrics for HIDSs are necessary for comparing HIDSs or determining the optimal operational point of a HIDS. While HIDSs and Network Intrusion Detection Systems NIDSs greatly differ, similar evaluations have been performed on...
- Tags: University Of Maryland, Intrusion Detection System, Attack, HIDS, Intrusion Detection, Network Security, Security, Networking
- White papers 2007-11-28
- Tiger Woods losing big tourney? No, but Colorado trails in solar decathlon
- It's the end of Tuesday and the lead has shifted in the third Solar Decathlon in Washington D.C. The champ in the first two decathlons in 2002 and 2005 was the University of Colorado. To keep their title, they have a long, hard climb from eighth...
- Tags: University Of Maryland, Corporate Communications, Web Site Development, Web Technology, Marketing, Internet, Harry Fuller
- Blog posts 2007-10-16
- Intrusion Detection System Resiliency to Byzantine Attacks: The Case Study of Wormholes in OLSR
- This paper proposes a mathematical framework for obtaining performance bounds of Byzantine attackers and the Intrusion Detection System IDS in terms of detection delay. It formulates the problem of distributed collaborative defense against coordinated attacks in MANET as a dynamic game problem. In this formulation on the one hand there...
- Tags: University Of Maryland, Attacker, Intrusion Detection System, Attack, Intrusion Detection, Security
- White papers 2007-08-24
- Layout-Accurate Design and Implementation of a High-Throughput Interconnection Network for Single-Chip Parallel Processing
- A Mesh of Trees MoT on-chip interconnection network has been proposed recently to provide high throughput between memory units and processors for single-chip parallel processing. This paper reports the findings in bringing this concept to silicon. Specifically, it conducts cycle-accurate verilog simulations to verify the analytical results. The paper synthesizes...
- Tags: University Of Maryland, Network, Arbitration, Interconnection Network, Networking
- White papers 2007-06-07
- Scratch-Pad Memory Allocation Without Compiler Support for Java Applications
- This paper presents the first scratch-pad memory allocation scheme that requires no compiler support for interpreted-language based applications. A Scratch-Pad Memory SPM is a fast compiler-managed SRAM that replaces the hardware-managed cache. Its uses are motivated by its better real-time guarantees as compared to cache and by its significantly lower...
- Tags: Java Application, University Of Maryland, Java, Compiler, Memory, Allocation, Development Tools, Software Development, Software/Web Development
- White papers 2007-04-22
- A Game-Theoretic Analysis of Denial of Service Attacks in Wireless Random Access
- This paper considers a random access system of non-cooperative selfish transmitters with the individual objectives of jointly optimizing throughput rewards, energy and delay costs. Their goal is to evaluate the effects of malicious nodes that have the dual objectives of blocking the packet transmissions of the other selfish nodes as...
- Tags: Denial Of Service, Packet, University Of Maryland, Microsoft Access, Wireless, Performance Management, Human Resources, Workforce Management
- White papers 2007-03-02
- Envisioning 911's version 2.0
- Writing in this weeks Science, two researchers at the University of Maryland argue that 911 services would benefit from a social networking treatment, Technology Review notes. Although dialing 911 is effective during health emergencies and home fires, when natural disasters like Hurricane Katrina strike, telephone operators are rapidly...
- Tags: Emergency, Government technology, State &, Local Govt
- Blog posts 2007-02-19
- Dell Precision Workstations With NVIDIA Graphics Cards Enhance Cutting-Edge Scientific Research at the University of Maryland Institute for Advanced Computer Studies
- Researchers at the University of Maryland Institute for Advanced Computer Studies are contributing to the development of a new approach to high-performance parallel computing that uses clusters of processors and Graphics Processing Units GPUs to support new algorithms and applications in computational biology, computer vision, virtual audio, signal processing, and...
- Tags: Video Card, Dell Computer Corp., University Of Maryland, Workstation, NVidia Corp., Computer, Dell Precision, PCI, Linux, Video Cards, Open Source, Operating Systems, Servers, Processors, Storage, Hardware, Software, Components, Semiconductors
- Case studies 2006-11-01
- Mesh-of-Trees and Alternative Interconnection Networks for Single-Chip Parallel Processing
- Many applications have stimulated the recent surge of interest single-chip parallel processing. In such machines, it is crucial to implement a high-throughput low-latency interconnection network to connect the on-chip components, especially the processing units and the memory units. This paper proposes a new Mesh of Trees MoT implementation of the...
- Tags: University Of Maryland, Network, Interconnection Network, Networking
- White papers 2006-08-11
- Blue crab nanosensor to fight terrorism
- A substance found in crab shells called chitosan has very useful properties. For example, it has been used in bandages to stop bleeding. But now, researchers at the University of Maryland have used the chitosan from blue crabs living in Chesapeake Bay as a component of a nanoscale sensor system...
- Tags: University of Maryland, substance
- Blog posts 2006-07-30
- Location-Clustering Techniques for WLAN Location Determination Systems
- This paper presents location clustering as a technique to significantly reduce the computational requirements of WLAN location determination systems. The paper provides two algorithms, namely, Joint Clustering and Incremental Triangulation, and describes their tradeoffs between computational cost and location determination accuracy. Both techniques reduce computational cost by more than an...
- Tags: Technique, University Of Maryland, WLAN, Productivity, Wireless LANs, LANs, Wi-Fi, Wireless, Networking
- White papers 2006-04-13
- Optical Network Design With Optical Constraints in IP/WDM Network
- This paper considers algorithms for the logical topology design and traffic grooming problem in WDM networks with router interface constraints as well as optical constraints. The optical constraints include restricted transmission range due to optical impairments as well as limits on the number of available wavelengths. It formulates this problem...
- Tags: University Of Maryland, Optical Network, Constraint, Network, IP, WDM, Research & Development, Optical Networking, Engineering, Networking, Business Operations
- White papers 2005-03-02
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