Aziz Mohaisen

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Social networks provide interesting algorithmic properties that can be used to bootstrap the security of distributed systems. For example, it is widely believed that social networks are fast mixing, and many recently proposed designs of such systems make crucial use of this property. However, whether real-world social networks are really fast mixing is not(More)
Energy is the most precious resource in wireless sensor networks. To ensure sustainable operations, wireless sensor systems need to harvest energy from environments. The timevarying environmental energy results in the dynamic change of the system’s available energy. Therefore, how to dynamically schedule tasks to match the time-varying energy is a(More)
Deep packet inspection is widely recognized as a powerful way which is used for intrusion detection systems for inspecting, deterring and deflecting malicious attacks over the network. Fundamentally, almost intrusion detection systems have the ability to search through packets and identify contents that match with known attacks. In this paper, we survey the(More)
Location based services (LBS) are one of the most promising and innovative directions of convergence technologies resulting of emergence of several fields including database systems, mobile communication, Internet technology, and positioning systems. Although being initiated as early as middle of 1990's, it is only recently that the LBS received a(More)
Encounter-based social networks and encounter-based systems link users who share a location at the same time, as opposed to the traditional social network paradigm of linking users who have an offline friendship. This new approach presents challenges that are fundamentally different from those tackled by previous social network designs. In this paper, we(More)
Social network-based Sybil defenses exploit the algorithmic properties of social graphs to infer the extent to which an arbitrary node in such a graph should be trusted. However, these systems do not consider the different amounts of trust represented by different graphs, and different levels of trust between nodes, though trust is being a crucial(More)
In this work, we introduce the Coordinated Cross Plane Session Termination, or CXPST, attack, a distributed denial of service attack that attacks the control plane of the Internet. CXPST extends previous work that demonstrates a vulnerability in routers that allows an adversary to disconnect a pair of routers using only data plane traffic. By carefully(More)
Today, botnets are still responsible for most large scale attacks on the Internet. Botnets are versatile, they remain the most powerful attack platform by constantly and continuously adopting new techniques and strategies in the arms race against various detection schemes. Thus, it is essential to understand the latest of the botnets in a timely manner so(More)