Single cloud provider is becoming less popular with customers due to potential problems such as service availability failure and the possibility that there are malicious insiders in the single cloud. In recent years, there has been a move towards “multiclouds”, “intercloud” or “cloud-of-clouds”. This paper focuses on the issues related to the data security aspect […]
Citation Parser using Sequent Alignment
Parsing citations is essential for integrating bibliographical information published on the Internet. Most citation management techniques are based on the assumption that we can correctly identify the main components of a citation, such as authors’ names, title, publication venue, date, and the number of pages. In this paper, we propose a sequence-alignment based citation parser, […]
ABSM Protocol for Vehicular Ad Hoc Networks
Broadcasting is the task of sending a message from a source node to all other nodes in the network. It is frequently referred to also as data dissemination. The design of reliable and efficient broadcast protocols is a key enabler for the successful deployment of vehicular communication services. In this paper we develop the Acknowledged […]
Source and Sink Location Hiding for Privacy Preservation
While many protocols for sensor network security provide confidentiality for the content of messages, contextual information usually remains exposed. Such contextual information can be exploited by an adversary to derive sensitive information such as the locations of monitored objects and data sinks in the field. Attacks on these components can significantly undermine any network application. […]
On Optimizing Overlay Topologies for Search in Unstructured Peer-to-Peer Networks
Unstructured peer-to-peer (P2P) file-sharing networks are popular in the mass market. As the peers participating in unstructured networks interconnect randomly, they rely on flooding query messages to discover objects of interest and thus introduce remarkable network traffic. Empirical measurement studies indicate that the peers in P2P networks have similar preferences, and have recently proposed unstructured […]
POPI: A User-Level Tool for Inferring Router Packet Forwarding Priority
Packet forwarding prioritization (PFP) in routers is one of the mechanisms commonly available to network operators. PFP can have a significant impact on the accuracy of network measurements, the performance of applications and the effectiveness of network troubleshooting procedures. Despite its potential impacts, no information on PFP settings is readily available to end users. In […]
Packet-Hiding Methods for Preventing Selective Jamming Attacks
The open nature of the wireless medium leaves it vulnerable to intentional interference attacks, typically referred to as jamming. This intentional interference with wireless transmissions can be used as a launchpad for mounting Denial-of-Service attacks on wireless networks. Typically, jamming has been addressed under an external threat model. However, adversaries with internal knowledge of protocol […]
Bounding the Impact of Unbounded Attacks in Stabilization
Self-stabilization is a versatile approach to fault-tolerance since it permits a distributed system to recover from any transient fault that arbitrarily corrupts the contents of all memories in the system. Byzantine tolerance is an attractive feature of distributed systems that permit to cope with arbitrary malicious behaviors. Combining these two properties proved difficult: it is […]
Catching Packet Droppers and Modifiers in Wireless Sensor Networks
Packet dropping and modification are common attacks that can be launched by an adversary to disrupt communication in wireless multihop sensor networks. Many schemes have been proposed to mitigate or tolerate such attacks, but very few can effectively and efficiently identify the intruders. To address this problem, we propose a simple yet effective scheme, which […]
Detection and Localization of Multiple Spoofing Attackers in Wireless Networks
Wireless spoofing attacks are easy to launch and can significantly impact the performance of networks. Although the identity of a node can be verified through cryptographic authentication, conventional security approaches are not always desirable because of their overhead requirements. In this paper, we propose to use spatial information, a physical property associated with each node, […]