University of Cyprus

About: University of Cyprus is a education organization based out in Nicosia, Cyprus. It is known for research contribution in the topics: Large Hadron Collider & Standard Model. The organization has 3624 authors who have published 15157 publications receiving 412135 citations.

Invariant mass distribution of jet pairs produced in association with a W Boson in pp̄ Collisions at √s=1.96TeV

Abstract: We report a study of the invariant mass distribution of jet pairs produced in association with a W boson using data collected with the CDF detector which correspond to an integrated luminosity of 4.3 fb(-1). The observed distribution has an excess in the 120-160 GeV/c(2) mass range which is not described by current theoretical predictions within the statistical and systematic uncertainties. In this Letter, we report studies of the properties of this excess.

Throwhammer: Rowhammer Attacks over the Network and Defenses

Abstract: Increasingly sophisticated Rowhammer exploits allow an attacker that can execute code on a vulnerable system to escalate privileges and compromise browsers, clouds, and mobile systems. In all these attacks, the common assumption is that attackers first need to obtain code execution on the victim machine to be able to exploit Rowhammer either by having (unprivileged) code execution on the victim machine or by luring the victim to a website that employs a malicious JavaScript application. In this paper, we revisit this assumption and show that an attacker can trigger and exploit Rowhammer bit flips directly from a remote machine by only sending network packets. This is made possible by increasingly fast, RDMA-enabled networks, which are in wide use in clouds and data centers. To demonstrate the new threat, we show how a malicious client can exploit Rowhammer bit flips to gain code execution on a remote key-value server application. To counter this threat, we propose protecting unmodified applications with a new buffer allocator that is capable of fine-grained memory isolation in the DRAM address space. Using two real-world applications, we show that this defense is practical, self-contained, and can efficiently stop remote Rowhammer attacks by surgically isolating memory buffers that are exposed to untrusted network input.

A Comprehensive Survey of Congestion Control Protocols in Wireless Sensor Networks

Abstract: Congestion control and reliable data delivery are two primary functions of the transport layer in wired and wireless networks. Wireless sensor networks (WSNs) are a special category of wireless ad hoc networks with unique characteristics and important limitations. Limitations concern their resources, such as energy, memory, and computational power, as well as their applications. Due to these limitations and characteristics, the Transmission Control Protocol (TCP), the legacy protocol that implements congestion control and reliable transmission in the Internet, cannot apply to WSNs in its traditional form. To deal with this unavailability of a standard solution, many efforts are taking place in this area. In this paper, we review, classify, and compare algorithms, protocols, and mechanisms that deal directly with congestion control and avoidance in WSNs.