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University of British Columbia (12 results)
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- Cell phones tracking nightlife activity
- A Columbia University computer science professor has co-founded a New York-based company named Sense Networks to sell tracking software to other companies. It is also distributing a free version of this software named Citysense, which shows on your cell phone where the wild things are happening in your own town....
- Blog posts 2008-06-29
- Secure "Selecticast" for Collaborative Intrusion Detection Systems
- The problem domain of Collaborative Intrusion Detection Systems CIDS introduces distinctive data routing challenges, which the paper shows are solvable through a sufficiently flexible publish-subscribe system. CIDS share intrusion detection data among organizations, usually to predict impending attacks earlier and more accurately, e.g., from Internet worms that tend to attack...
- White papers 2008-01-01
- Toward Cost-Sensitive Modeling for Intrusion Detection and Response
- Intrusion Detection Systems IDSs must maximize the realization of security goals while minimizing costs. This paper studies the problem of building cost-sensitive intrusion detection models. The paper examines the major cost factors associated with an IDS, which include development cost, operational cost, damage cost due to successful intrusions, and the...
- White papers 2008-01-01
- Achieving High Throughput in Low Multiplexed, High Bandwidth, High Delay Environments
- This paper explores combining ECN bits and loss feedback to achieve a high throughput connection in a high bandwidth, low multiplexed environment. In the scheme, a TCP source reacts differently on receiving an ECN than it does on inferring a packet loss in terms of congestion window update. Coupled with...
- White papers 2008-01-01
- EasyVPN: IPsec Remote Access Made Easy
- Telecommuting and access over a Wireless LAN require strong security at the network level. Although IPsec is well-suited for this task, it is difficult to configure and operate a large number of clients. To address this problem, the almost universal deployment is leveraged and use of web browsers capable of...
- White papers 2008-01-01
- MOVE: An End-to-End Solution to Network Denial of Service
- This paper presents a solution to the Denial of Service DoS problem that does not rely on network infrastructure support, conforming to the end-to-end (e2e) design principle. The approach is to combine an overlay network, which allows to treat authorized traffic preferentially, with a lightweight process-migration environment that allows one...
- White papers 2008-01-01
- Accelerating Application-Level Security Protocols
- This paper presents a minimal extension to the BSD socket layer that can improve the performance of application-level security protocols, such as SSH or SSL/TLS, by 10%, when hardware cryptographic accelerators are available in the system. Applications specify what cryptographic transforms must be applied to incoming and outgoing data frames,...
- White papers 2008-01-01
- SSARES: Secure Searchable Automated Remote Email Storage
- This paper presents a novel system that offers a practical approach to both securing remotely stored email and allowing privacy - preserving search of that email collection. Their solution encrypts email (the headers, body, and attachments) as it arrives on the server using public - key encryption. SSARES uses a...
- White papers 2007-09-27
- Optimizing Frequency Queries for Data Mining Applications
- Data mining algorithms use various Trie and bitmap-based representations to optimize the support (i.e., frequency) counting performance. This paper compares the memory requirements and support counting performance of FP Tree, and Compressed Patricia Trie against several novel variants of vertical bit vectors. First, borrowing ideas from the VLDB domain, they...
- White papers 2007-08-08
- Buy-at-Bulk Network Design With Protection
- This paper considers approximation algorithms for buy-at-bulk network design, with the additional constraint that demand pairs be protected against edge or node failures in the network. In practice, the most popular model used in high speed telecommunication networks for protection against failures, is the so-called 1+1 model. In this model,...
- White papers 2007-08-07
- The Shapley Value Mechanism for ISP Settlement
- Within the current Internet, autonomous ISPs implement bilateral agreements, with each ISP establishing agreements that suit its own local objective to maximize its profit. Peering agreements based on local views and bilateral settlements, while expedient, encourage selfish routing strategies and discriminatory interconnections. From a more global perspective, such settlements reduce...
- White papers 2007-07-06
- Proximity Breeds Danger: Emerging Threats in Metro-Area Wireless Networks
- The growing popularity of wireless networks and mobile devices is starting to attract unwanted attention especially as potential targets for malicious activities reach critical mass. This paper tries to quantify the threat from large-scale distributed attacks on wireless networks, and, more specifically, wifi networks in densely populated metropolitan areas. The...
- White papers 2007-05-15
- E-CSMA: Supporting Enhanced CSMA Performance in Experimental Sensor Networks Using Per-Neighbor Transmission Probability Thresholds
- A transmitter in a wireless network that uses CSMA, a simple carrier sensing-based MAC protocol, to determine the likelihood of successful packet reception at the intended receiver can easily be misled. At the same time, CSMA variants and hybrid MAC protocols based at least in part on carrier sensing have...
- White papers 2007-05-08
- Fairness and Physical Layer Capture in Random Access Networks
- While physical layer capture has been observed in real implementations of wireless devices which randomly accessing shared channels, fair rate control algorithms based on accurate channel models describing the phenomenon have not been developed. In this paper, using the general physical channel model, the paper formally presents the characteristics of...
- White papers 2007-03-22
- On the Detection of Signaling DoS Attacks on 3G Wireless Networks
- Third Generation (3G) wireless networks based on the CDMA2000 and UMTS standards are now increasingly being deployed throughout the world. Because of their complex signaling and relatively limited bandwidth, these 3G networks are generally more vulnerable than their wireline counterparts, thus making them fertile ground for new attacks. This paper...
- White papers 2007-01-29
- {sets} - A Lightweight Constraint Programming Language Based on ROBDDs
- Constraint programming is a step toward ideal programming: one merely defines the problem domain and the constraints the solution must meet and let the computer do the rest. Many constraint programming languages have been developed; the majority of them employ iterative constraint propagation over the problem variables. While such an...
- White papers 2007-01-13
- The GAL Programming Language: A Rapid Prototyping Language for Graph Algorithms
- A graph G consists of a set of vertices V and a set of edges E each of which joins two of the vertices. This simple abstraction serves as a model for a multitude of real world systems and leads to a wide variety of useful and elegant algorithms for...
- White papers 2006-12-19
- G!: A Programming Language for 2D Games
- The minutia of game development is a tedious and complicated affair. In general, game developers are forced to write repetitive code that requires a lot of bookkeeping in order to ensure its proper function. If one takes a moment to think about the details involved in writing code to figure...
- White papers 2006-12-19
- pTHINC: A Thin-Client Architecture for Mobile Wireless Web
- Although web applications are gaining popularity on mobile wireless PDAs, web browsers on these systems can be quite slow and often lack adequate functionality to access many web sites. This paper has developed pTHINC, a PDA thin-client solution that leverages more powerful servers to run full-function web browsers and other...
- White papers 2006-05-26
- Siemens Case Study: Columbia University
- Columbia University is the oldest institution of higher learning in the state of New York and the fifth oldest in the United States. Amid the frenzied worry about Y2K that marked the close of 1999, Columbia chose to begin the installation of the Siemens HiPath IP solution. The system comprises...
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