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Columbia University
(362 results)-
White Papers
Regulating User Arrivals at a Mobile IP Home Agent
September 23, 2009, 12:00am PDT
With the increasing levels of data usage in mobile cellular networks, Mobile IP and its variants serve as the de facto standard for mobility management. At high user loads, the Mobile IP Home...
Provided by Columbia University
-
White Papers
Polar Coordinate Routing for Multiple Paths in Wireless Networks
December 9, 2009, 12:00am PST
The authors propose Polar Coordinate Routing (PCR) to create multiple paths between a source and a destination in wireless networks. The scheme creates paths that are circular segments of...
Provided by Columbia University
-
White Papers
Defending Against Next Generation Through Network/Endpoint Collaboration and Interaction
August 21, 2007, 12:00am PDT
Over the past few years the authors have seen the use of Internet worms, i.e., malicious self-replicating programs, as a mechanism to rapidly invade and compromise large numbers of remote...
Provided by Columbia University
-
White Papers
Taming the Devil: Techniques for Evaluating Anonymized Network Data
February 8, 2008, 12:00am PST
Anonymization plays a key role in enabling the public release of network datasets, and yet there are few, if any, techniques for evaluating the efficacy of network data anonymization techniques...
Provided by Columbia University
-
White Papers
Elastic Block Ciphers: Method, Security and Instantiations
December 4, 2008, 12:00am PST
The authors introduce the concept of an elastic block cipher, which refers to stretching the supported block size of a block cipher to any length up to twice the original block size while...
Provided by Columbia University
-
White Papers
Adding Trust to P2P Distribution of Paid Content
July 8, 2009, 12:00am PDT
While Peer-To-Peer (P2P) file-sharing is a powerful and cost-effective content distribution model, most paid-for digital-Content Providers (CPs) use direct download to deliver their content. CPs...
Provided by Columbia University
-
White Papers
BotSwindler: Tamper Resistant Injection of Believable Decoys in VM-Based Hosts for Crimeware Detection
June 18, 2010, 12:00am PDT
The authors introduce BotSwindler, a bait injection system designed to delude and detect crimeware by forcing it to reveal during the exploitation of monitored information. The implementation of...
Provided by Columbia University
-
White Papers
Global ISR: Toward a Comprehensive Defense Against Unauthorized Code Execution
November 30, 2010, 12:00am PST
Instruction-Set Randomization (ISR) obfuscates the "Language" understood by a system to protect against code-injection attacks by presenting an ever-changing target. ISR was originally motivated...
Provided by Columbia University
-
White Papers
Crimeware Swindling Without Virtual Machines
November 1, 2010, 12:00am PDT
In previous work, the authors introduced a bait-injection system designed to delude and detect crimeware by forcing it to reveal itself during the exploitation of captured information. Although...
Provided by Columbia University
-
White Papers
An Adversarial Evaluation of Network Signaling and Control Mechanisms
November 8, 2010, 12:00am PST
Network signaling and control mechanisms are critical to coordinate such diverse defense capabilities as honeypots and honeynets, host-based defenses, and online patching systems, any one of which...
Provided by Columbia University
-
White Papers
ILeak: A Lightweight System for Detecting Inadvertent Information Leaks
August 29, 2009, 12:00am PDT
Data loss incidents, where data of sensitive nature are exposed to the public, have become too frequent and have caused damages of millions of dollars to companies and other organizations....
Provided by Columbia University
-
White Papers
VeriSHIM a BDD Verifier for SHIM
December 21, 2007, 12:00am PST
Concurrent programming languages have become more popular with the advent of multi-core systems. Shared memory is read or written atomically, by concurrent processes to prevent races. A typical...
Provided by Columbia University
-
White Papers
Programming Shared Memory Multiprocessors With Deterministic Message-Passing Concurrency: Compiling SHIM to Pthreads
December 4, 2007, 12:00am PST
Multicore shared-memory architectures are becoming prevalent and bring many programming challenges. Among the biggest are data races: accesses to shared resources that make a program's behavior...
Provided by Columbia University
-
White Papers
A Deterministic Multi-Way Rendezvous Library for Haskell
January 21, 2008, 12:00am PST
The advent of multicore processors requires mainstream concurrent programming languages with high level concurrency constructs and effective debugging techniques. Unfortunately, many concurrent...
Provided by Columbia University
-
White Papers
Static Deadlock Detection for the SHIM Concurrent Language
April 10, 2008, 12:00am PDT
Concurrent programming languages are becoming mandatory with the advent of multi-core processors. Two major concerns in any concurrent program are data races and deadlocks. Each is potentially...
Provided by Columbia University
-
White Papers
Static Deadlock Detection in SHIM With an Automata Type Checking System
December 28, 2008, 12:00am PST
With the advent of multicores, concurrent programming languages are become more prevalent. Data Races and Deadlocks are two major problems with concurrent programs. SHIM is a concurrent...
Provided by Columbia University
-
White Papers
Buffer Sharing in CSP-Like Programs
July 11, 2009, 12:00am PDT
Most compilers focus on optimizing performance, often at the expense of memory, but efficient memory use can be just as important in constrained environments such as embedded systems. In this...
Provided by Columbia University
-
White Papers
A Determinizing Compiler
June 10, 2009, 12:00am PDT
The advent of multicores mandates parallel programming. While parallelism presents panoply of problems, few are as pernicious and prevalent as nondeterminism, in which the output of a program is...
Provided by Columbia University
-
White Papers
Simple and Fast Biased Locks
November 20, 2009, 12:00am PST
Locks are typically used to ensure exclusive access to shared memory locations. Unfortunately, lock operations are expensive, so much work has been done on optimizing their performance for common...
Provided by Columbia University
-
White Papers
Compiling SHIM
December 20, 2009, 12:00am PST
Embedded systems demand concurrency for supporting simultaneous actions in their environment and parallel hardware. Although most concurrent programming formalisms are prone to races and...
Provided by Columbia University
-
White Papers
Determinism Should Ensure Deadlock-Freedom
August 18, 2008, 12:00am PDT
Distributed and concurrent programming languages are becoming more prevalent with the emergence of new parallel architectures. Reducing communication and synchronization costs is a major issue in...
Provided by Columbia University
-
White Papers
Ensuring Deterministic Concurrency Through Compilation
April 14, 2010, 12:00am PDT
Multicore shared-memory architectures are becoming prevalent but bring many programming challenges. Among the biggest is non-determinism: the output of the program does not depend merely on the...
Provided by Columbia University
-
White Papers
Efficient, Deterministic and Deadlock-Free Concurrency
January 18, 2011, 12:00am PST
Concurrent programming languages are growing in importance with the advent of multicore systems. Two major concerns in any concurrent program are data races and deadlocks. Each is potentially...
Provided by Columbia University
-
White Papers
Buffer Sharing in Rendezvous Programs
April 2, 2010, 12:00am PDT
Most compilers focus on optimizing performance, often at the expense of memory, but efficient memory use can be just as important in constrained environments such as embedded systems. The authors...
Provided by Columbia University
-
White Papers
Techniques for Improving Opportunistic Sensor Networking Performance
March 27, 2008, 12:00am PDT
A number of recently proposed mobile sensor network architectures rely on uncontrolled, or weakly-controlled mobility to achieve sensing coverage over time at low cost, an opportunistic sensor...
Provided by Columbia University
-
White Papers
Bubble-Sensing: A New Paradigm for Binding a Sensing Task to the Physical World Using Mobile Phones
March 14, 2008, 12:00am PDT
This paper proposes Bubble-Sensing, a new sensor network abstraction that allows mobile phones users to create a binding between tasks (e.g., Take a photo, or sample audio every hour indefinitely)...
Provided by Columbia University
-
White Papers
A Network-Worm Vaccine Architecture
January 1, 2011, 12:00am PST
The ability of worms to spread at rates that effectively preclude human-directed reaction has elevated them to a first-class security threat to distributed systems. The authors present the first...
Provided by Columbia University
-
White Papers
Reputation Systems for Anonymous Networks
April 22, 2008, 12:00am PDT
The authors present a reputation scheme for a pseudonymous Peer-To-Peer (P2P) system in an anonymous network. Misbehavior is one of the biggest problems in pseudonymous P2P systems, where there is...
Provided by Columbia University
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White Papers
On the Infeasibility of Modeling Polymorphic Shellcode for Signature Detection
January 1, 2011, 12:00am PST
Polymorphic malcode remains one of the most troubling threats for information security and intrusion defense systems. The ability for malcode to be automatically transformed into to a semantically...
Provided by Columbia University
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White Papers
Cooperation Between Stations in Wireless Networks
September 5, 2007, 12:00am PDT
In a wireless network, Mobile Nodes (MNs) repeatedly perform tasks such as Layer 2 (L2) handoff, Layer 3 (L3) handoff and authentication. These tasks are critical, particularly for real-time...
Provided by Columbia University
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White Papers
Quantifying Application Behavior Space for Detection and Self-Healing
January 1, 2011, 12:00am PST
The increasing sophistication of software attacks has created the need for increasingly finer-grained intrusion and anomaly detection systems, both at the network and the host level. The authors...
Provided by Columbia University
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White Papers
Bloodhound: Searching Out Malicious Input in Network Flows for Automatic Repair Validation
January 1, 2011, 12:00am PST
Many current systems security research efforts focus on mechanisms for Intrusion Prevention and Self-Healing Software. Unfortunately, such systems find it difficult to gain traction in many...
Provided by Columbia University
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White Papers
Protocols and System Design, Reliability, and Energy Efficiency in Peer-to-Peer Communication Systems
January 22, 2011, 12:00am PST
Modern Voice-over-IP (VoIP) communication systems provide a bundle of services to their users. These services range from the most basic voice-based services such as voice calls and voice mail to...
Provided by Columbia University
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White Papers
Detecting Traffic Snooping in Anonymity Networks Using Decoys
February 3, 2011, 12:00am PST
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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White Papers
Decoy Document Deployment for Effective Masquerade Attack Detection
January 21, 2011, 12:00am PST
Masquerade attacks pose a grave security problem that is a consequence of identity theft. Detecting masqueraders is very hard. Prior work has focused on pro ling legitimate user behavior and...
Provided by Columbia University
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White Papers
Data Collection and Analysis for Masquerade Attack Detection: Challenges and Lessons Learned
January 30, 2011, 12:00am PST
Real-world large-scale data collection poses an important challenge in the security field. Insider and masquerader attack data collection poses even a greater challenge. Very few organizations...
Provided by Columbia University
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White Papers
Configuration Fuzzing for Software Vulnerability Detection
October 7, 2009, 12:00am PDT
Many software security vulnerabilities only reveal themselves under certain conditions, i.e., particular configurations of the software together with its particular runtime environment. One...
Provided by Columbia University
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White Papers
Mouth-to-Ear Latency in Popular VoIP Clients
July 9, 2009, 12:00am PDT
Most popular instant messaging clients are now offering Voice-over-IP (VoIP) technology. The many options running on similar platforms, implementing common audio codecs and encryption algorithms...
Provided by Columbia University
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White Papers
Serving Niche Video-on-Demand Content in a Managed P2P Environment
July 3, 2009, 12:00am PDT
A limitation of existing P2P VoD services is their inability to support efficient streamed access to niche content that has relatively small demand. This limitation stems from the poor performance...
Provided by Columbia University
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White Papers
Flexible Filters: Load Balancing Through Backpressure for Stream Programs
June 16, 2009, 12:00am PDT
Stream processing is a promising paradigm for programming multi-core systems for high-performance embedded applications. The authors propose flexible filters as a technique that combines static...
Provided by Columbia University
-
White Papers
Techniques for Improving Opportunistic Sensor Networking Performance
March 27, 2008, 12:00am PDT
A number of recently proposed mobile sensor network architectures rely on uncontrolled, or weakly-controlled mobility to achieve sensing coverage over time at low cost, an opportunistic sensor...
Provided by Columbia University
-
White Papers
Buffer Sharing in Rendezvous Programs
April 2, 2010, 12:00am PDT
Most compilers focus on optimizing performance, often at the expense of memory, but efficient memory use can be just as important in constrained environments such as embedded systems. The authors...
Provided by Columbia University
-
White Papers
Efficient, Deterministic and Deadlock-Free Concurrency
January 18, 2011, 12:00am PST
Concurrent programming languages are growing in importance with the advent of multicore systems. Two major concerns in any concurrent program are data races and deadlocks. Each is potentially...
Provided by Columbia University
-
White Papers
Ensuring Deterministic Concurrency Through Compilation
April 14, 2010, 12:00am PDT
Multicore shared-memory architectures are becoming prevalent but bring many programming challenges. Among the biggest is non-determinism: the output of the program does not depend merely on the...
Provided by Columbia University
-
White Papers
Determinism Should Ensure Deadlock-Freedom
August 18, 2008, 12:00am PDT
Distributed and concurrent programming languages are becoming more prevalent with the emergence of new parallel architectures. Reducing communication and synchronization costs is a major issue in...
Provided by Columbia University
-
White Papers
Compiling SHIM
December 20, 2009, 12:00am PST
Embedded systems demand concurrency for supporting simultaneous actions in their environment and parallel hardware. Although most concurrent programming formalisms are prone to races and...
Provided by Columbia University
-
White Papers
Simple and Fast Biased Locks
November 20, 2009, 12:00am PST
Locks are typically used to ensure exclusive access to shared memory locations. Unfortunately, lock operations are expensive, so much work has been done on optimizing their performance for common...
Provided by Columbia University
-
White Papers
A Determinizing Compiler
June 10, 2009, 12:00am PDT
The advent of multicores mandates parallel programming. While parallelism presents panoply of problems, few are as pernicious and prevalent as nondeterminism, in which the output of a program is...
Provided by Columbia University
-
White Papers
Buffer Sharing in CSP-Like Programs
July 11, 2009, 12:00am PDT
Most compilers focus on optimizing performance, often at the expense of memory, but efficient memory use can be just as important in constrained environments such as embedded systems. In this...
Provided by Columbia University
-
White Papers
Static Deadlock Detection in SHIM With an Automata Type Checking System
December 28, 2008, 12:00am PST
With the advent of multicores, concurrent programming languages are become more prevalent. Data Races and Deadlocks are two major problems with concurrent programs. SHIM is a concurrent...
Provided by Columbia University
-
White Papers
Static Deadlock Detection for the SHIM Concurrent Language
April 10, 2008, 12:00am PDT
Concurrent programming languages are becoming mandatory with the advent of multi-core processors. Two major concerns in any concurrent program are data races and deadlocks. Each is potentially...
Provided by Columbia University
-
White Papers
A Deterministic Multi-Way Rendezvous Library for Haskell
January 21, 2008, 12:00am PST
The advent of multicore processors requires mainstream concurrent programming languages with high level concurrency constructs and effective debugging techniques. Unfortunately, many concurrent...
Provided by Columbia University
-
White Papers
Programming Shared Memory Multiprocessors With Deterministic Message-Passing Concurrency: Compiling SHIM to Pthreads
December 4, 2007, 12:00am PST
Multicore shared-memory architectures are becoming prevalent and bring many programming challenges. Among the biggest are data races: accesses to shared resources that make a program's behavior...
Provided by Columbia University
-
White Papers
VeriSHIM a BDD Verifier for SHIM
December 21, 2007, 12:00am PST
Concurrent programming languages have become more popular with the advent of multi-core systems. Shared memory is read or written atomically, by concurrent processes to prevent races. A typical...
Provided by Columbia University
-
White Papers
ILeak: A Lightweight System for Detecting Inadvertent Information Leaks
August 29, 2009, 12:00am PDT
Data loss incidents, where data of sensitive nature are exposed to the public, have become too frequent and have caused damages of millions of dollars to companies and other organizations....
Provided by Columbia University
-
White Papers
An Adversarial Evaluation of Network Signaling and Control Mechanisms
November 8, 2010, 12:00am PST
Network signaling and control mechanisms are critical to coordinate such diverse defense capabilities as honeypots and honeynets, host-based defenses, and online patching systems, any one of which...
Provided by Columbia University
-
White Papers
Crimeware Swindling Without Virtual Machines
November 1, 2010, 12:00am PDT
In previous work, the authors introduced a bait-injection system designed to delude and detect crimeware by forcing it to reveal itself during the exploitation of captured information. Although...
Provided by Columbia University
-
White Papers
Global ISR: Toward a Comprehensive Defense Against Unauthorized Code Execution
November 30, 2010, 12:00am PST
Instruction-Set Randomization (ISR) obfuscates the "Language" understood by a system to protect against code-injection attacks by presenting an ever-changing target. ISR was originally motivated...
Provided by Columbia University
-
White Papers
BotSwindler: Tamper Resistant Injection of Believable Decoys in VM-Based Hosts for Crimeware Detection
June 18, 2010, 12:00am PDT
The authors introduce BotSwindler, a bait injection system designed to delude and detect crimeware by forcing it to reveal during the exploitation of monitored information. The implementation of...
Provided by Columbia University
-
White Papers
Adding Trust to P2P Distribution of Paid Content
July 8, 2009, 12:00am PDT
While Peer-To-Peer (P2P) file-sharing is a powerful and cost-effective content distribution model, most paid-for digital-Content Providers (CPs) use direct download to deliver their content. CPs...
Provided by Columbia University
-
White Papers
Elastic Block Ciphers: Method, Security and Instantiations
December 4, 2008, 12:00am PST
The authors introduce the concept of an elastic block cipher, which refers to stretching the supported block size of a block cipher to any length up to twice the original block size while...
Provided by Columbia University
-
White Papers
Taming the Devil: Techniques for Evaluating Anonymized Network Data
February 8, 2008, 12:00am PST
Anonymization plays a key role in enabling the public release of network datasets, and yet there are few, if any, techniques for evaluating the efficacy of network data anonymization techniques...
Provided by Columbia University
-
White Papers
Defending Against Next Generation Through Network/Endpoint Collaboration and Interaction
August 21, 2007, 12:00am PDT
Over the past few years the authors have seen the use of Internet worms, i.e., malicious self-replicating programs, as a mechanism to rapidly invade and compromise large numbers of remote...
Provided by Columbia University
-
White Papers
Polar Coordinate Routing for Multiple Paths in Wireless Networks
December 9, 2009, 12:00am PST
The authors propose Polar Coordinate Routing (PCR) to create multiple paths between a source and a destination in wireless networks. The scheme creates paths that are circular segments of...
Provided by Columbia University
-
White Papers
Regulating User Arrivals at a Mobile IP Home Agent
September 23, 2009, 12:00am PDT
With the increasing levels of data usage in mobile cellular networks, Mobile IP and its variants serve as the de facto standard for mobility management. At high user loads, the Mobile IP Home...
Provided by Columbia University
-
White Papers
LoST: A Protocol for Mapping Geographic Locations to Public Safety Answering Points
January 1, 2011, 12:00am PST
Public Safety Answering Points (PSAPs) serve limited geographic areas, so emergency callers must be directed to the most appropriate PSAP. As part of the overall Internet Engineering Task Force...
Provided by Columbia University
-
White Papers
Distributed Self Fault-Diagnosis for SIP Multimedia Applications
August 14, 2007, 12:00am PDT
In spite of the recent growth in Internet multimedia communications, service availability and voice quality of IP-based multimedia applications still falls behind when compared to traditional PSTN...
Provided by Columbia University
-
White Papers
Challenges for the Location-Aware Web
April 27, 2010, 12:00am PDT
The Web is on its way to becoming a location-aware information system. This transition causes some technical and policy challenges in terms of both design and coordination with existing approaches...
Provided by Columbia University
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White Papers
Balancing Uplink and Downlink Delay of VoIP Traffic in WLANs Using Adaptive Priority Control (APC)
January 1, 2011, 12:00am PST
In IEEE 802.11 wireless networks, the downlink delay rises as the number of VoIP nodes increases while the uplink delay remains small due to the same chance of media access between nodes and the...
Provided by Columbia University
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White Papers
Deployment Guidelines for Highly Congested IEEE 802.11b/g Networks
July 28, 2008, 12:00am PDT
Over the years, IEEE 802.11b/g wireless networks have been deployed in various locations such as hotels, airports and enterprises. Although IEEE 802.11b/g can be considered a mature technology,...
Provided by Columbia University
-
White Papers
Energy Efficiency of Voice-Over-IP Systems
November 30, 2010, 12:00am PST
The authors identified the key components that are implemented on servers in a c/s VoIP system and by super nodes in a p2p VoIP system (Skype). They presented a model for understanding power...
Provided by Columbia University
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White Papers
RDGL: Random Data Generator Language
June 25, 2007, 12:00am PDT
Random Data Generator Language (RDGL) is a language which facilitates the generation of random data in a very flexible and powerful way. It is most analogous to regular expressions except instead...
Provided by Columbia University
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White Papers
Team SoundHammer: Language Proposal for Atomic Sound Manipulation Language (ASML)
June 11, 2007, 12:00am PDT
Atomic Sound Manipulation Language is Team SoundHammer's solution to the problem of how to make a high level computer language that describes effects that can be applied to sound waves. The idea...
Provided by Columbia University
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White Papers
XML Document Manipulation Language
June 11, 2007, 12:00am PDT
XDML is a simple, high-level language for XML documents manipulation and analysis. This paper will discuss the use of the language, features that the author intend to implement and its syntax. He...
Provided by Columbia University
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White Papers
V-Detector : An Efficient Negative Selection Algorithm With "Probably Adequate" Detector Coverage
November 9, 2008, 12:00am PST
This paper describes an enhanced Negative Selection Algorithm (NSA) called V- detector. Several key characteristics make this method a state-of-the-art advance in the decade-old NSA. First,...
Provided by Columbia University
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White Papers
TagLearner: A P2P Classifier Learning System From Collaboratively Tagged Text Documents
September 25, 2009, 12:00am PDT
The amount of text data on the Internet is growing at a very fast rate. Online text repositories for news agencies, digital libraries and other organizations currently store gigaand tera-bytes of...
Provided by Columbia University
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White Papers
Assessing the Vulnerability of the Fiber Infrastructure to Disasters
January 14, 2008, 12:00am PST
This paper considers the interaction between channel assignment and distributed scheduling in multi-channel multiradio Wireless Mesh Networks (WMNs). Recently, a number of distributed scheduling...
Provided by Columbia University
-
White Papers
A Network Worm Vaccine Architecture
January 1, 2011, 12:00am PST
The ability of worms to spread at rates that effectively preclude human-directed reaction has elevated them to a first-class security threat to distributed systems. The authors present the first...
Provided by Columbia University
-
White Papers
WebDAVA: An Administrator-Free Approach to Web File-Sharing
January 1, 2011, 12:00am PST
Collaboration over the Internet depends on the ability of the members of a group to exchange data in a secure yet unobtrusive manner. WebDAVA is a system that allows users to define their own...
Provided by Columbia University
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White Papers
Design and Implementation of Virtual Private Services
January 1, 2011, 12:00am PST
Large scale distributed applications such as electronic commerce and online marketplaces combine network access with multiple storage and computational elements. The distributed responsibility for...
Provided by Columbia University
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