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Columbia University
(362 results)-
White Papers
Detecting and Mitigating Denial-of-Service Attacks on Voice Over IP Networks
April 11, 2008, 12:00am PDT
Voice over IP (VoIP) is more susceptible to Denial of Service attacks than traditional data traffic, due to the former's low tolerance to delay and jitter. This paper describes the design of their...
Provided by Columbia University
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White Papers
Brave New World: Pervasive Insecurity of Embedded Network Devices
June 21, 2009, 12:00am PDT
Embedded network devices have become a ubiquitous fixture in the modern home, office as well as in the global communication infrastructure. Devices like routers, NAS appliances, home entertainment...
Provided by Columbia University
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White Papers
Spectrogram: A Mixture-of-Markov-Chains Model for Anomaly Detection in Web Traffic
January 5, 2009, 12:00am PST
This paper presents a new model and sensor framework that offers a favorable balance under this constraint and demonstrates improvement over some existing approaches. Spectrogram is a network...
Provided by Columbia University
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White Papers
Behavior-Profile Clustering for False Alert Reduction in Anomaly Detection Sensors
October 22, 2008, 12:00am PDT
Anomaly Detection (AD) sensors compute behavior profiles to recognize malicious or anomalous activities. The behavior of a host is checked continuously by the AD sensor and an alert is raised when...
Provided by Columbia University
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White Papers
Behavior-Based Network Access Control: A Proof-of-Concept
June 21, 2008, 12:00am PDT
Current Network Access Control (NAC) technologies implement a pre-connect phase where the status of a device is checked against a set of policies before being granted access to a network, and a...
Provided by Columbia University
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White Papers
FLIPS: Hybrid Adaptive Intrusion Prevention
January 1, 2009, 12:00am PST
Intrusion detection systems are fundamentally passive and fail-open. Because their primary task is classification, they do nothing to prevent an attack from succeeding. An Intrusion Prevention...
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White Papers
Collaborative Distributed Intrusion Detection
January 1, 2009, 12:00am PST
The rapidly increasing array of Internet - scale threats is a pressing problem for every organization that utilizes the network. Organizations often have limited resources to detect, and respond...
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White Papers
Behavior Profiling of Email
January 1, 2009, 12:00am PST
This paper describes the forensic and intelligence analysis capabilities of the Email Mining Toolkit (EMT) under development at the Columbia Intrusion Detection (IDS) Lab. EMT provides the means...
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White Papers
Security Assurance for Web Device APIs
November 6, 2008, 12:00am PST
There are many obvious reasons why web developers would like enhanced access to the facilities of the client platform. It is equally obvious that such access represents an enormous potential...
Provided by Columbia University
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White Papers
Interaction With the Environment: Sensor Data Visualization in Outdoor Augmented Reality
September 29, 2009, 12:00am PDT
Proliferating sensor systems provide a rich source of data for understanding the dynamic characteristics of the environment. Visualization of, and interaction with, such data in outdoor augmented...
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White Papers
Design of the Netmate Network Management System
November 7, 2007, 12:00am PST
The Network management, analysis, and testing environment (Netmate) project addresses research and experimental issues in distributed network management of large, heterogeneous networks. This...
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White Papers
NETMATE: A Network Management Environment
November 6, 2007, 12:00am PST
The Network Management, Analysis, and Testing Environment (NETMATE) project proposes the design and implementation of a comprehensive data model to address the problems in distributed network...
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White Papers
Statistics 695V: Data Visualization, Spring 2005
January 1, 2008, 12:00am PST
Many approaches to learning from data today involve the use of complex tools that extent tailor themselves to the patterns of the data, a form of automated learning. But human guidance from data...
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White Papers
Information Literacy in the Laptop Classroom
April 25, 2008, 12:00am PDT
This paper analyzes the information literacy and research practice in a purposely stratified selection of 10 one-to-one laptop K - 12 schools in California and Maine. Research Design/Data...
Provided by Columbia University
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White Papers
Research Directions for Network Intrusion Recovery
July 25, 2009, 12:00am PDT
One of the most significant unsolved problems for network managers and system administrators is how to repair a network infrastructure after discovering evidence of an extensive compromise. The...
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White Papers
Automated Data Cleaning Linking Data Manager to Study Coordinator: Error Finding by Variable and Error Fixing by Subject
March 19, 2010, 12:00am PDT
Many researchers using the SAS System software receive data sets with incomplete data or data errors. Data cleaning can become an extremely tedious task for the Coordinators who must return to...
Provided by Columbia University
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White Papers
The Goal-Gradient Hypothesis Resurrected: Purchase Acceleration, Illusionary Goal Progress, And Customer Retention
July 12, 2008, 12:00am PDT
The goal-gradient hypothesis denotes the classic finding from behaviorism that animals expend more effort as they approach a reward. Building on this hypothesis, the authors of this paper generate...
Provided by Columbia University
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White Papers
Financial Models: Why All The Fuss?
December 10, 2009, 12:00am PST
This article covers the discussion in the research symposium "The Quantitative Revolution and the Crisis: How Have Quantitative Financial Models Been Used and Misused" at Columbia Business School...
Provided by Columbia University
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White Papers
The Best Time To Start A Business
June 20, 2008, 12:00am PDT
Becoming an entrepreneur is a very personal decision, and the right time to start a business is when it's right for you. On average, 90 percent of the entrepreneurs surveyed felt it was a good...
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White Papers
Entrepreneurs: What To Do When You Are Out On A Long, Thin Limb
February 10, 2009, 12:00am PST
How are entrepreneurs weathering the financial storm? Panelists in a recent Master Class on Innovation and the Economy discussed some of the ways entrepreneurs can stay competitive in a down...
Provided by Columbia University
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White Papers
Opportunities In Alternative Energy
November 18, 2009, 12:00am PST
In an event held at Columbia Business School, Warren Buffett and Bill Gates spoke on opportunities in alternative energy. Gates identified energy - including renewable sources, like solar -...
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White Papers
Banking On Recycling
August 8, 2008, 12:00am PDT
Ron Gonen will change the way you think about recycling. He's been honing his strategy ever since the day he convinced his high school of the economic benefits of purchasing reusable metal...
Provided by Columbia University
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White Papers
Tips For Managing A Fast-Growing Company
May 9, 2008, 12:00am PDT
It seems like any entrepreneur would kill for the chance to become an early leader in one of the many fast-growing global industries. Yet fast growth can lead to a wide range of problems, from...
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White Papers
Lab Work For Your Business Model
April 9, 2010, 12:00am PDT
Management professor Rita McGrath says experimentation must be an integral part of a company's strategy in order to remain competitive in the future. "The level of uncertainty and speed of change...
Provided by Columbia University
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White Papers
Beyond The Five-year Strategic Plan
October 24, 2007, 12:00am PDT
In his new book, Bill Duggan reveals how to cultivate strategic intuition to drive innovation, solve problems and capitalize on unforeseen opportunities. Professor Duggan is the author of three...
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White Papers
From The Start-Up Frontline
June 19, 2009, 12:00am PDT
For the MBA grad who is launching his or her own venture this year, the current economy is a mixed blessing. "Suddenly every investment banker wants to be an entrepreneur," says Tom Bowen Wright...
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White Papers
Strategic Competition in Social Entrepreneurship
December 8, 2008, 12:00am PST
This post on the challenges facing social entrepreneurship is drawn from remarks made on October. 23, 2008 at "Leadership for the 21st Century," an interactive training session held at the U.S....
Provided by Columbia University
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White Papers
Reflexive Modeling For An Uncertain Economy
February 3, 2009, 12:00am PST
Models pose a paradox. They hold the key to extraordinary profits but can inflict destructive losses on a bank. Because a model entails a complex perspective on issues that are typically fuzzy and...
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White Papers
Too Small To Fail?
January 26, 2009, 12:00am PST
Innovative, upstart ventures have a crucial role to play in economic recovery, says Michael A. M. Keehner, who suggests it may be time to give entrepreneurs a stimulus package of their own....
Provided by Columbia University
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White Papers
The Cost Of Latency
March 16, 2010, 12:00am PDT
Modern electronic markets have been characterized by a relentless drive towards faster decision making. Significant technological investments have lead to dramatic improvements in latency, or, the...
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White Papers
Smartphones and Emerging Markets: A New Technology Revolution?
June 17, 2009, 12:00am PDT
It is no secret that the mobile phone industry is thriving in emerging markets, and that this growth has helped make cell phones the fastest spreading technology in human history. Less known, but...
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White Papers
The Art Of Choosing
March 26, 2010, 12:00am PDT
This story covers professor Sheena Iyengar's views on strategies for managing choices in an era of seemingly boundless options. Sheena Iyengar is the S. T. Lee Professor of Business in the...
Provided by Columbia University
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White Papers
A Conversation With ... Rita Gunther McGrath, On Obstacles To Innovation-Led Growth
January 26, 2009, 12:00am PST
In this conversation with Ruth Gunther McGrath, faculty director - Columbia University, she covers her views on on Obstacles to Innovation-Led Growth. Ruth maintains that the economic problems are...
Provided by Columbia University
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White Papers
Strategy As Learning
April 22, 2010, 12:00am PDT
Businesses that seek sustainable competitive advantage must set aside the view that strategy is planning and embrace the idea that strategy is learning, says Willie Pietersen - Professor of the...
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White Papers
Deriving Value From Social Commerce Networks
April 6, 2010, 12:00am PDT
Social commerce is an emerging trend in which sellers are connected in online social networks, and where sellers are individuals instead of firms. This paper examines the economic value...
Provided by Columbia University
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White Papers
Engaging Consumers, Creating Value
August 31, 2009, 12:00am PDT
Findings on value creation and regulatory fit offer far-ranging implications for management, marketing and even mental health. Value - how much importance or worth people place on any given thing...
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White Papers
Does AMD Spur Intel To Innovate More?
July 29, 2009, 12:00am PDT
The authors of this paper estimate a model of dynamic oligopoly with durable goods and endogenous innovation to examine the effect of competition on innovation in the PC microprocessor industry....
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Preference For New Product Information Sources
June 18, 2008, 12:00am PDT
This paper examines the preferences of advice seekers for human information sources. The authors focus on advice providers who are high in technical expertise (technical knowledge) and/or social...
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White Papers
The Probability Of Default, Excessive Risk, And Executive Compensation
February 1, 2010, 12:00am PST
The financial crisis of 2008 has many causes, with the role of executive compensation in creating excessive risk taking being frequently cited in the press and by policy makers as a leading...
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White Papers
Staffing And Control Of Many-Server Service Systems
April 16, 2008, 12:00am PDT
This paper considers large-scale service systems with multiple customer classes and agent types. Customers are classified according to their processing requirements, service-level guarantees, or...
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...
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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...
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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,...
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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
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...
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
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
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
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
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
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
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...
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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
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
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
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...
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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
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...
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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
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
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
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...
Provided by Columbia University
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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
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...
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
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
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
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
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
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...
Provided by Columbia University
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Whitepapers
An Email Worm Vaccine Architecture
January 1, 2012, 12:00am PST
The authors present an architecture for detecting "Zero-day" worms and viruses in incoming email. Their main idea is to intercept every incoming message, pre-scan it for potentially dangerous...
Provided by Columbia University
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Whitepapers
CompactDFA: Generic State Machine Compression for Scalable Pattern Matching
December 22, 2009, 12:00am PST
Pattern matching algorithms lie at the core of all contemporary Intrusion Detection Systems (IDS), making it intrinsic to reduce their speed and memory requirements. This paper focuses on the most...
Provided by Columbia University
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Whitepapers
Hash Tables With Finite Buckets Are Less Resistant to Deletions
July 8, 2010, 12:00am PDT
The authors show that when memory is bounded, i.e., buckets are finite, dynamic hash tables that allow insertions and deletions behave significantly worse than their static counterparts that only...
Provided by Columbia University
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Whitepapers
On the Performance of Flexgrid-Based Optical Networks
April 17, 2012, 12:00am PDT
The ever increasing IP traffic volume has finally brought to light the high inefficiency of current wavelength-routed rigid-grid networks in matching the client layer requirements. Such an issue...
Provided by Columbia University
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White Papers
Source Prefix Filtering in ROFL
July 26, 2009, 12:00am PDT
Traditional firewalls have the ability to allow or block traffic based on source address as well as destination address and port number. The authors' original ROFL scheme implements firewalling by...
Provided by Columbia University
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White Papers
Privacy Enhanced Access Control for Outsourced Data Sharing
September 21, 2011, 12:00am PDT
Traditional access control models often assume that the entity enforcing access control policies is also the owner of data and re-sources. This assumption no longer holds when data is outsourced...
Provided by Columbia University
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White Papers
A Study of Privacy Setting Errors in an Online Social Network
January 31, 2012, 12:00am PST
Access control policies are notoriously difficult to configure correctly, even people who are professionally trained system administrators experience difficulty with the task. With the increasing...
Provided by Columbia University
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White Papers
Lost in Translation: Improving Decoy Documents Via Automated Translation
April 13, 2012, 12:00am PDT
Detecting insider attacks continues to prove to be one of the most difficult challenges in securing sensitive data. Decoy information and documents represent a promising approach to detecting...
Provided by Columbia University
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White Papers
Fog Computing: Mitigating Insider Data Theft Attacks in the Cloud
March 22, 2012, 12:00am PDT
Cloud computing promises to significantly change the way the people use computers and access and store their personal and business information. With these new computing and communications...
Provided by Columbia University
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White Papers
KVM for ARM
June 4, 2010, 12:00am PDT
As ARM CPUs grow in performance and ubiquity across phones, netbooks, and embedded computers, providing virtualization support for ARM-based devices is increasingly important. The authors present...
Provided by Columbia University
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