Structured peer-to-peer (P2P) lookup services—such as Chord, CAN, Pastry and Tapestry—organize peers into a flat overlay network and offer distributed hash table (DHT) functionality. In these systems, data is associated with keys and each peer is responsible for a subset of the keys. We study hierarchical DHTs, in which peers are organized into groups, and each group has its autonomous intra-gr...

Throughout its lifetime, the Internet was always associated with overlay networks; from the World Wide Web and peer-to-peer networks to blogs and social networking solutions, overlays built on the Internet infrastructure gave it additional value and made it more engaging to everyday users. Today, rising overlay networks such as the Smart Grid as well as a multitude of sensor, mobile and wireles...

Geosynthetic materials have been demonstrated to be an accurate element in civil engineering, specifically the field of pavement. Regarding implementation these asphalt mixture layers, geosynthetics, such as geotextile and geogrid, used delay crack propagation and/or increase fatigue life. However, use material is based on experience learned or results obtained from testing a reduced scale labo...

In this paper, we study the interaction between overlay routing and Traffic Engineering (TE) in a single Autonomous System (AS). We formulate this interaction as a two-player non-cooperative non-zero sum game, where the overlay tries to minimize the delay of its traffic and the TE’s objective is to minimize network cost. We study a Nash routing game with best-reply dynamics, in which the overla...

This paper studies the security issues that arise in an overlay multicast architecture where service providers distribute content such as web pages, static and streaming multimedia data, realtime stock quotes, or security updates to a large number of users. In particular, two major security problems of overlay multicast, network access control and group key management, are addressed. We first p...

The research community has turned to create Semantic Overlay Networks for information retrieval in large scale peer-to-peer networks. Much research work in semantic overlay protocols and searching algorithms is done and their results indicate that semantic overlay is powerful for content searching in peer-to-peer network. However, very limited work has been done in analyzing and evaluating char...

This paper proposes a novel recovery method from large-scale network failures caused by earthquakes, terrorist attacks, largescale power outages, and software bugs. Our method, which takes advantage of overlay networking technologies, pre-calculates multiple routing configurations for multiple network failures occurring simultaneously and selects the appropriate configuration immediately after ...

In this paper, we discuss the “free-riding”traffic problem in routing overlay networks, which is mainly caused by policy mis-match between the overlay routing and the underlay IP routing. We first define the free-riding problem in routing overlay network, and construct mathematical models for the amount of the free-riding traffic. We next present the numerical examples on the effectiveness of t...