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Columbia University
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Noise Resistant Graph Ranking for Improved Web Image Search
April 4, 2011, 12:00am PDT
In this paper, the authors exploit a novel ranking mechanism that processes query samples with noisy labels, motivated by the practical application of web image search re-ranking where the...
Provided by Columbia University
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Traffic Analysis Against Low-Latency Anonymity Networks Using Available Bandwidth Estimation
July 3, 2010, 12:00am PDT
The authors introduce a novel remotely-mounted attack that can expose the network identity of an anonymous client, hidden service, and anonymizing proxies. To achieve this, they employ single-end...
Provided by Columbia University
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White Papers
Stable Deterministic Multithreading Through Schedule Memoization
September 24, 2010, 12:00am PDT
A Deterministic MultiThreading (DMT) system eliminates non-determinism in thread scheduling, simplifying the development of multithreaded programs. However, existing DMT systems are unstable; they...
Provided by Columbia University
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White Papers
Financial Markets Research In Marketing
June 1, 2009, 12:00am PDT
Not long ago, the use of financial market data was viewed as outside the area of marketing, and the interactions of marketing with the financial markets were little studied. Increasingly,...
Provided by Columbia University
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White Papers
Software Self-Healing Using Collaborative Application Communities
June 22, 2007, 12:00am PDT
Software monocultures are usually considered dangerous because their size and uniformity represent the potential for costly and widespread damage. The emerging concept of collaborative security...
Provided by Columbia University
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White Papers
Performance of Data Dissemination Among Mobile Devices
August 13, 2007, 12:00am PDT
This paper presents 7DS, a novel peer-to-peer data sharing system. 7DS is an architecture, a set of protocols and an implementation enabling the exchange of data among peers that are not...
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White Papers
Performance of Information Discovery and Message Relaying in Mobile Ad Hoc Networks
August 13, 2007, 12:00am PDT
This paper presents 7DS, a novel peer-to-peer resource sharing system. 7DS is an architecture, a set of protocols and an implementation enabling the exchange of data among peers that are not...
Provided by Columbia University
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White Papers
How Can American AEC Firms Get The Lead In Sustainable Building Design? What A Potential Design Leader Should Know About "Green-Convertible Buildings."
November 1, 2009, 12:00am PDT
Energy-efficient building design and operations reduce the negative impacts of buildings on human health, natural environment, and non-renewable energy resources by reducing waste, pollution,...
Provided by Columbia University
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White Papers
Cultural Boundary Spanning In Global Project Networks
October 27, 2009, 12:00am PDT
Projects are increasingly global in scope and outsourcing on projects increasingly common. Along with globalizing trends in projects, the workforce is also globalizing. It is common for engineers...
Provided by Columbia University
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White Papers
Multi-Scale Temporal Segmentation and Outlier Detection in Sensor Networks
January 1, 2011, 12:00am PST
Monitoring multimodal data generated by sensor networks for extracting information is a challenging task for the human observer. To manage the barrage of data, one needs to create mechanisms for...
Provided by Columbia University
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Whitepapers
A Robust MDP Approach to Secure Power Control in Cognitive Radio Networks
May 24, 2012, 12:00am PDT
Power control plays a key role in realizing reliable and spectrum-efficient communications in a cognitive radio network. In this paper, the authors study secure power control schemes for cognitive...
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Whitepapers
CCNxServ: Dynamic Service Scalability in Information-Centric Networks
May 24, 2012, 12:00am PDT
Content-centric networks promise to address content networking issues in a better way than today's host-based networking architecture. But content-centric networking does not inherently address...
Provided by Columbia University
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Whitepapers
Predicting the Number of Mobile Subscribers: An Accurate Forecasting System and Its Application
March 12, 2012, 12:00am PDT
Forecasting economic quantities can bring high benefits to business planning and operation. To provide accurate forecasts and to investigate the factors behind the trends, the authors present a...
Provided by Columbia University
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Whitepapers
Uplink Interference Mitigation for OFDMA Femtocell Networks
September 24, 2011, 12:00am PDT
Femtocell networks, consisting of a conventional macro cellular deployment and overlaying femtocells, forming a hierarchical cell structure, constitute an attractive solution to improving the...
Provided by Columbia University
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Whitepapers
Privacy Preserving Revocable Predicate Encryption Revisited
November 16, 2012, 12:00am PST
Predicate Encryption (PE) that provides both the access control of ciphertexts and the privacy of ciphertexts is a new paradigm of public-key encryption. An important application of predicate...
Provided by Columbia University
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Whitepapers
Extensible Monitoring with Nagios and Messaging Middleware
November 5, 2012, 12:00am PST
Monitoring is a core function of systems administration, and is primarily a problem of communication - a good monitoring tool communicates with users about problems, and communicates with hosts...
Provided by Columbia University
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Whitepapers
Aggregating CL-Signatures Revisited: Extended Functionality and Better Efficiency
October 23, 2012, 12:00am PDT
Aggregate signature is public-key signature that allows anyone to aggregate different signatures generated by different signers on different messages into a short (called aggregate) signature. The...
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Whitepapers
Sequential Aggregate Signatures with Short Public Keys: Design, Analysis and Implementation Studies
December 17, 2012, 12:00am PST
The notion of aggregate signature has been motivated by applications and it enables any user to compress different signatures signed by different signers on different messages into a short...
Provided by Columbia University
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Whitepapers
Scalable Group Signatures with Revocation
August 7, 2012, 12:00am PDT
Group signatures are a central cryptographic primitive, simultaneously supporting accountability and anonymity. They allow users to anonymously sign messages on behalf of a group they are members...
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Whitepapers
Simultaneous Wavelength Conversion of ASK and DPSK Signals Based on Four-Wave-Mixing in Dispersion Engineered Silicon Waveguides
June 20, 2011, 12:00am PDT
The authors experimentally demonstrate Four-Wave-Mixing (FWM)-based continuous wavelength conversion of optical Differential-Phase-Shift-Keyed (DPSK) signals with large wavelength conversion...
Provided by Columbia University
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Whitepapers
DPSK Modulation Using a Microring Modulator
April 7, 2011, 12:00am PDT
As Multi-Core Processors (MCPs) continue to scale in size and complexity, the emerging interconnect-bandwidth bottleneck will have to be resolved by technology that transcends traditional...
Provided by Columbia University
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Whitepapers
Continuously Tunable Wavelength Conversion of Data with Record Probe-Idler Separations in a Silicon Nanowire
December 20, 2010, 12:00am PST
The growing demands for optical communication bandwidth are driving optical communication technologies toward increased wavelength channel density, spectrally-efficient modulation formats, higher...
Provided by Columbia University
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Whitepapers
High-Speed Data Transmission in Multi-Layer Deposited Silicon Photonics for Advanced Photonic Networks-on-Chip
April 7, 2011, 12:00am PDT
Advanced silicon photonic devices and systems, constructing photonic Networks-on-Chip (NoCs), are slated to be instrumental in enabling new generations of computational parallelism leveraging Chip...
Provided by Columbia University
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Whitepapers
Cross-Layer Enabled Translucent Optical Network With Real-Time Impairment Awareness
November 21, 2012, 12:00am PST
The existing dimensioning strategy for translucent, sub-wavelength switching architectures relies on over-provisioning, and consequently, overuse of costly, power-consuming...
Provided by Columbia University
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Whitepapers
Combining Baiting and User Search Profiling Techniques for Masquerade Detection
May 1, 2012, 12:00am PDT
Masquerade attacks are characterized by an adversary stealing a legitimate user's credentials and using them to impersonate the victim and perform malicious activities, such as stealing...
Provided by Columbia University
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Whitepapers
Privacy-Preserving Social Plugins
June 19, 2012, 12:00am PDT
The widespread adoption of social plugins, such as Facebook's Like and Google's +1 buttons, has raised concerns about their implications to user privacy, as they enable social networking services...
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Whitepapers
Dead.drop: URL-Based Stealthy Messaging
August 29, 2011, 12:00am PDT
The Internet's public character mandates the need for confidential communications in respect to users' right to privacy. Cryptography may not always suffice on its own, as a user can be forced to...
Provided by Columbia University
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Whitepapers
IRILD: An Information Retrieval Based Method for Information Leak Detection
August 29, 2011, 12:00am PDT
The traditional approach for detecting information leaks is to generate fingerprints of sensitive data, by partitioning and hashing it, and then comparing these fingerprints against outgoing...
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Whitepapers
Detecting Traffic Snooping in Tor Using Decoys
June 21, 2011, 12:00am PDT
Anonymous communication networks like Tor partially protect the confidentiality of their users' traffic by encrypting all intra-overlay communication. However, when the relayed traffic reaches the...
Provided by Columbia University
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Whitepapers
Taint-Exchange: a Generic System for Cross-Process and Cross-Host Taint Tracking
July 29, 2011, 12:00am PDT
Dynamic Taint Analysis (DTA) has been heavily used by security researchers for various tasks, including detecting unknown exploits, analyzing malware, preventing information leaks, and many more....
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Whitepapers
A Multilayer Overlay Network Architecture for Enhancing IP Services Availability Against DoS
October 20, 2011, 12:00am PDT
Protection against Denial of Service (DoS) attacks is a challenging and ongoing problem. Current overlay-based solutions can transparently filter unauthorized traffic based on user authentication....
Provided by Columbia University
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Whitepapers
Two-Person Control Administration: Preventing Administration Faults Through Duplication
August 27, 2009, 12:00am PDT
Modern computing systems are complex and difficult to administer, making them more prone to system administration faults. Faults can occur simply due to mistakes in the process of administering a...
Provided by Columbia University
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Whitepapers
TimeWarp: Rethinking Timekeeping and Performance Monitoring Mechanisms to Mitigate Side-Channel Attacks
August 14, 2012, 12:00am PDT
Over the past two decades, several microarchitectural side channels have been exploited to create sophisticated security attacks. Solutions to this problem have mainly focused on fixing the source...
Provided by Columbia University
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Whitepapers
Silencing Hardware Backdoors
March 4, 2011, 12:00am PST
Hardware components can contain hidden backdoors, which can be enabled with catastrophic effects or for ill-gotten profit. These backdoors can be inserted by a malicious insider on the design team...
Provided by Columbia University
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Whitepapers
A New SIP Event Package For Group Membership Management in Advanced Communications
August 15, 2008, 12:00am PDT
Group management is a trendy concept in the Next Generation Network environments. There are many software implementations such as Group List Management Server (GLMS) and in a broader scope: XML...
Provided by Columbia University
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Whitepapers
VoIP-Based Air Traffic Controller Training
September 26, 2008, 12:00am PDT
Extending VoIP beyond the Internet telephony, the authors propose a case study of applying the technology outside of its intended domain, to solve a real-world problem. This paper is an attempt to...
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Whitepapers
Session Initiation Protocol (SIP) Server Overload Control: Design and Evaluation
July 8, 2008, 12:00am PDT
A Session Initiation Protocol (SIP) server may be overloaded by emergency-induced call volume, "American Idol" style flash crowd effects or denial of service attacks. The SIP server overload...
Provided by Columbia University
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Whitepapers
Real-World SIP Interoperability: Still an Elusive Quest
November 27, 2007, 12:00am PST
With more than a decade of development led by the IETF, and a plethora of devices and software systems speaking its dialect, SIP together with its related standards has grown in size and scale,...
Provided by Columbia University
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Whitepapers
IPv6 Addresses as Content Names in Information-Centric Networking
May 13, 2011, 12:00am PDT
Content is quickly beginning to emerge as the core of Internet and networking applications today. Among the most important research issues with content is the problem of addressing and naming...
Provided by Columbia University
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Whitepapers
Dynamic Service Scalability in Information-Centric Networks
May 13, 2011, 12:00am PDT
Information- or Content-Centric Networks have gotten a lot of interest recently, particularly due to the promise to address problems inherent in today's host-based networking architecture. But...
Provided by Columbia University
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White Papers
Central Bank Communication And Expectations Stabilization
December 4, 2007, 12:00am PST
¬¬¬The value of communication in monetary policy is analyzed in a model in which expectations need not be consistent with central bank policy - and, therefore, "Unanchored" - because agents face...
Provided by Columbia University
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White Papers
Opinions As Incentives
November 26, 2007, 12:00am PST
The authors study a model where a Decision Maker (DM) must select an adviser to advise her about an unknown state of the world. There is a pool of available advisers who all have the same...
Provided by Columbia University
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White Papers
Intertemporal Distortions In The Second Best
November 21, 2007, 12:00am PST
The authors consider a very general class of public finance problems that encompasses Ramsey models of optimal taxation as well as economies with limited commitment, private information, and...
Provided by Columbia University
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White Papers
Does Exporting Lead To Productivity Spillovers In Horizontal Or Vertical Industries? Evidence From Indonesia
August 1, 2007, 12:00am PDT
This paper investigates the presence of productivity spillovers due to exporting. In particular, it examines whether productivity gains from exporting spill over upstream (to suppliers),...
Provided by Columbia University
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White Papers
Globalization And Monetary Control
July 31, 2007, 12:00am PDT
In this paper, the author considers three possible mechanisms through which it might be feared that globalization can undermine the ability of monetary policy to control inflation: by making...
Provided by Columbia University
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How Important Is Money In The Conduct Of Monetary Policy?
July 31, 2007, 12:00am PDT
The author considers some of the leading arguments for assigning an important role to tracking the growth of monetary aggregates when making decisions about monetary policy. First, the author...
Provided by Columbia University
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Class Size And Sorting In Market Equilibrium: Theory And Evidence
July 1, 2007, 12:00am PDT
This paper examines how schools choose class size and how households sort in response to those choices. The model offers an explanation for two distinct empirical patterns observed among private...
Provided by Columbia University
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White Papers
Who Merits Financial Aid? Massachusetts? Adams Scholarship
July 18, 2007, 12:00am PDT
The majority of states in the U.S. now fund merit-based financial aid programs, the effects of which depend on how strongly students react to changes in college costs. The author estimates such...
Provided by Columbia University
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White Papers
IP-Based Protocols for Mobile Internetworking
November 6, 2007, 12:00am PST
The authors consider the problem of providing network access to hosts whose physical location changes with time. Such hosts cannot depend on traditional forms of network connectivity and routing...
Provided by Columbia University
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White Papers
Change-Centric Management of Versions in an XML Warehouse
January 1, 2011, 12:00am PST
The authors present a change-centric method to manage versions in a Web WareHouse of XML data. The starting point is a sequence of snapshots of XML documents they obtain from the web. By running a...
Provided by Columbia University
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White Papers
Throughput and Fairness in CSMA/CA Wireless Networks
January 1, 2011, 12:00am PST
While physical layer capture has been observed in real implementations of wireless devices accessing the channel like 802.11, log-utility fair allocation algorithms based on accurate channel...
Provided by Columbia University
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White Papers
Linear Approximation of Optimal Attempt Rate in Random Access Networks
January 1, 2011, 12:00am PST
While packet capture has been observed in real implementations of wireless devices randomly accessing shared channels, fair rate control algorithms based on accurate channel models that describe...
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White Papers
Speculative Execution as an Operating System Service
January 1, 2011, 12:00am PST
Software faults and vulnerabilities continue to present significant obstacles to achieving reliable and secure software. In an effort to overcome these obstacles, systems often incorporate...
Provided by Columbia University
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White Papers
Seamless Layer-2 Handoff Using Two Radios in IEEE 802.11 Wireless Networks
January 1, 2011, 12:00am PST
A number of algorithms have been proposed to achieve seamless layer-2 handoff. However, none of them eliminated handoff delay completely although some of them improved handoff time significantly,...
Provided by Columbia University
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White Papers
Binary-Level Function Proling for Intrusion Detection and Smart Error Virtualization
January 1, 2011, 12:00am PST
Most current approaches to Self-Healing Software (SHS) suffer from semantic incorrectness of the response mechanism. To support SHS, the authors propose Smart Error Virtualization (SEV), which...
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White Papers
Towards in Vivo Testing of Software Applications
October 15, 2007, 12:00am PDT
Software products released into the field typically have some number of residual bugs that either were not detected or could not have been detected during testing. This may be the result of flaws...
Provided by Columbia University
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Distributed Algorithms for Secure Multipath Routing in Attack-Resistant Networks
January 1, 2011, 12:00am PST
To proactively defend against intruders from readily jeopardizing single-path data sessions, the authors propose a distributed secure multipath solution to route data across multiple paths so that...
Provided by Columbia University
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White Papers
Measurements of Multicast Service Discovery in a Campus Wireless Network
March 24, 2008, 12:00am PDT
Applications utilizing multicast service discovery protocols, such as iTunes, have become increasingly popular. However, multicast service discovery protocols are considered to generate network...
Provided by Columbia University
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White Papers
Autotagging to Improve Text Search for 3D Models
December 9, 2007, 12:00am PST
Text search on 3D models has traditionally worked poorly, as text annotations on 3D models are often unreliable or incomplete. In this paper the authors attempt to improve the recall of text...
Provided by Columbia University
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White Papers
LinkWidth: A Method to Measure Link Capacity and Available Bandwidth Using Single-End Probes
January 5, 2008, 12:00am PST
This paper introduces LinkWidth, a method for estimating capacity and available bandwidth using single-end controlled TCP packet probes. To estimate capacity, the authors generate a train of TCP...
Provided by Columbia University
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White Papers
Newspeak: A Secure Approach for Designing Web Applications
February 18, 2008, 12:00am PST
Internet applications are being used for more and more important business and personal purposes. Despite efforts to lock down web servers and isolate databases, there is an inherent problem in the...
Provided by Columbia University
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White Papers
One Server Per City: Using TCP for Very Large SIP Servers
February 29, 2008, 12:00am PST
The transport protocol for SIP can be chosen based on the requirements of services and network conditions. How does the choice of TCP affect the scalability and performance compared to UDP? The...
Provided by Columbia University
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White Papers
Optimal Splitters for Database Partitioning With Size Bounds
February 27, 2008, 12:00am PST
Partitioning is an important step in several database algorithms, including sorting, aggregation, and joins. Partitioning is also fundamental for dividing work into equal-sized (Or balanced)...
Provided by Columbia University
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White Papers
The Impact of SCTP on Server Scalability and Performance
March 27, 2008, 12:00am PDT
The Stream Control Transmission Protocol (SCTP) is a relatively recent transport protocol, offering features beyond TCP. Although SCTP is an alternative transport protocol for the Session...
Provided by Columbia University
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White Papers
Masquerade Detection Using a Taxonomy-Based Multinomial Modeling Approach in UNIX Systems
June 24, 2008, 12:00am PDT
This paper presents one-class Hellinger distance-based and one-class SVM modeling techniques that use a set of features to reveal user intent. The specific objective is to model user command...
Provided by Columbia University
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White Papers
IEEE 802.11 in the Large: Observations at an IETF Meeting
September 13, 2007, 12:00am PDT
The authors observed wireless network traffic at the 65th IETF Meeting in Dallas, Texas in March of 2006, attended by approximately 1200 engineers. The event was supported by a very large number...
Provided by Columbia University
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White Papers
A Comprehensive Survey of Voice Over IP Security Research
December 22, 2010, 12:00am PST
This paper presents a comprehensive survey of Voice over IP security academic research, using a set of 245 publications forming a closed cross-citation set. The authors classify these papers...
Provided by Columbia University
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White Papers
Modeling User Search Behavior for Masquerade Detection
December 22, 2010, 12:00am PST
Masquerade attacks are a common security problem that is a consequence of identity theft. Masquerade detection may serve as a means of building more secure and dependable systems that authenticate...
Provided by Columbia University
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White Papers
Towards Using Cached Data Mining for Large Scale Recommender Systems
October 29, 2010, 12:00am PDT
Recommender systems are becoming increasingly popular. As these systems become commonplace and the number of users increases, it will become important for these systems to be able to cope with a...
Provided by Columbia University
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White Papers
Baseline: Metrics for Setting a Baseline for Web Vulnerability Scanners
September 22, 2010, 12:00am PDT
As web scanners are becoming more popular because they are faster and cheaper than security consultants, the trend of relying on these scanners also brings a great hazard: users can choose a weak...
Provided by Columbia University
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White Papers
Simple-VPN: Simple IPsec Configuration
July 19, 2010, 12:00am PDT
The IPsec protocol promised easy, ubiquitous encryption. That has never happened. For the most part, IPsec usage is confined to VPNs for road warriors, largely due to needless configuration...
Provided by Columbia University
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White Papers
Empirical Study of Concurrency Mutation Operators for Java
April 29, 2010, 12:00am PDT
Mutation testing is a white-box fault-based software testing technique that applies mutation operators to modify program source code or byte code in small ways and then runs these modified...
Provided by Columbia University
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White Papers
CONFU: Configuration Fuzzing Testing Framework for Software Vulnerability Detection
March 31, 2010, 12:00am PDT
Many software security vulnerabilities only reveal themselves under certain conditions, i.e., particular configurations and inputs together with a certain runtime environment. One approach to...
Provided by Columbia University
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White Papers
Computational Cameras: Approaches, Benefits and Limits
January 15, 2011, 12:00am PST
A computational camera uses a combination of optics and software to produce images that cannot be taken with traditional cameras. In the last decade, computational imaging has emerged as a vibrant...
Provided by Columbia University
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White Papers
Delegation And The Regulation Of Finance In The United States Since 1950
August 17, 2009, 12:00am PDT
What determines the extent and structure of financial regulation? This question matters for two reasons. First, it matters because, as North and Shirley says "A country's financial institutions...
Provided by Columbia University
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White Papers
Criteria For Financial Regulation After The Current Crisis
June 20, 2008, 12:00am PDT
The recent financial crisis is a result of both inherent flows in the way financial market operate (e.g. their tendency to boom bust behavior) and insufficient, as well as inappropriate,...
Provided by Columbia University
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White Papers
Tamper Evident Microprocessors
April 1, 2010, 12:00am PDT
Most security mechanisms proposed to date unquestioningly place trust in microprocessor hardware. This trust, however, is misplaced and dangerous because microprocessors are vulnerable to insider...
Provided by Columbia University
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White Papers
Distributed Delay Estimation and Call Admission Control in IEEE 802.11 WLANs
December 3, 2007, 12:00am PST
Voice over WiFi (VoWiFi) will soon be the main alternative to cellular phones. Providing a satisfactory user experience remains difficult, however. This paper focuses on Call Admission Control...
Provided by Columbia University
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White Papers
Systems Optimization for Mobility Management
April 28, 2010, 12:00am PDT
Wireless network mobility frees the user from location dependence but requires additional mechanism to preserve network connectivity. Mobility events occur when user movement causes one network...
Provided by Columbia University
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White Papers
Experimental Analysis of Multi Interface Mobility Management with SIP and MIP
January 1, 2010, 12:00am PST
The authors provide an experimental analysis of MIMM (Multi-Interface Mobility Management) demonstrated in a heterogeneous network involving 802. 1 lb and CDMA access technologies. They have...
Provided by Columbia University
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