Protection of the sensitive data is an important issue because of the fast development of applications that need exchange of the secret information over the Internet. Secret sharing is an idea proposed by Shamir and Blakley separately with different implementations in 1979. Lin and Tsai proposed a method that uses Steganography to create meaningful shares by using Shamir’s secret sharing scheme...

This paper focuses on the protection of virtual circuits (Label Switched Paths, LSPs) in a (G)MPLS (Generalised Multi-Protocol Label Switching) network. The proposed algorithm is designed to protect traffic with strong delay requirements such as EF (Expedited Forwarding) ordered aggregates in a DiffServ domain. Indeed, for this type of application, we need fast restoration in case of failure. T...

We propose an adaptive token bucket algorithm for achieving proportional sharing of bandwidth among aggregate flows in differentiated service (DiffServ) networks. By observing the simulation results obtained in a study of the throughput of TCP flows in a DiffServ network, we note that the aggregate flow with a lower target rate occupies more bandwidth than its fair share, while the aggregate fl...

In this paper we present a comparative analysis of bandwidth access control schemes under nonstationary traac conditions for heterogeneous circuit-mode traf-c ooered to a B-ISDN network link. A uniied model to analyze the behavior of several bandwidth access control schemes is developed using a Markov process model with acceptance functions. Numerical method techniques are used to solve the ass...

We propose an extension of the Distributed Queue Dual Bus (DQDB) protocol called Request Controlled DQDB that can achieves 100% channel utilization and has similar sharing properties as the bandwidth balancing method. Transmission of requests in the Request Controlled DQDB method is controlled by a mechanism that is similar to the one used in DQDB to transmit segments. The bandwidth balancing m...

Modern multicore platforms suffer from inefficiencies due to contention and communication caused by sharing resources or accessing shared data. In this paper, we demonstrate that information from low-cost hardware performance counters commonly available on modern processors is sufficient to identify and separate the causes of communication traffic and performance degradation. We have developed ...

In this paper, we argue the need for effective resource management mechanisms for sharing resources in commodity clusters. To address this issue, we present the design of Sharc—a system that enables resource sharing among applications in such clusters. Sharc depends on single node resource management mechanisms such as reservations or shares and extends the benefits of such mechanisms to cluste...

As an inexpensive, simple, and scalable solution for broadband access, Ethernet passive optical networks (EPONs) have the capability of delivering integrated broadband services to the end users. A critical issue of EPONs is the utility of a shared upstream channel among the local users, and thus an efficient bandwidth allocation mechanism is required to facilitate statistical multiplexing among...

WiMAX has been introduced as a competitive alternative for metropolitan broadband wireless access technologies. It is connection oriented and it can provide very high data rates, large service coverage, and flexible quality of services (QoS). Due to the large number of connections and flexible QoS supported by WiMAX, the uplink access in WiMAX networks is very challenging since the medium acces...

The growing deployment of wireless local area networks (WLANs) in corporate environments, the increasing number of wireless Internet service providers, and demand for quality of service support create a need for controlled sharing of wireless bandwidth. In this thesis, a method for using long-term channel-state information in order to control the sharing of wireless bandwidth is studied. The al...