This paper presents the first hierarchical Byzantine tolerant replication architecture suitable to systems that span multiple wide area sites. The architecture confines the effects of any malicious replica to its local site, reduces message complexity of wide area communication, and allows read-only queries to be performed locally within a site for the price of additional hardware. A prototype ...

the sangbast-shandiz fault zone, with a length of about 57 km, a width of moderately 2 km, and a nw-se direction, is located about 15 km in the west of mashhad city. that is one of the major faults in the binalud mountains. geomorphic evidences illustrate that the sangbast-shandiz fault zone has dextral strike- slip offsets with thrust activity. in this article, we investigated geomorphic featu...

In this paper, we employ the Communicating finite state machine (CFSM) model for networks to investigate fault management using passive testing. First, we introduce the concept of passive testing. Then, we introduce the CFSM model, the observer model and the fault model with necessary assumptions. We introduce the fault detection algorithm using passive testing. Then, we briefly present our new...

Prediction of fault-prone modules provides one way to support software quality engineering through improved scheduling and project control. There are many metrics and techniques available to investigate the accuracy of fault prone classes which may help software organizations for planning and performing testing activities. Bayes algorithms are being successfully applied for solving both classif...

In a replicated environment, same data are often distributed to several sites in order to improve the data availability, fault tolerance and faster access. However, when a replica is modified by a user, the other replicas become stale. In such situation a mechanism is needed to keep them consistent, which means all the replicated data have the same content. This can be achieved using a synchron...

In this paper we analyze practical aspects of the differential fault attack on RSA published by Boneh, Demillo and Lipton from Bellcore. We focus on the CRT variant, which requires only one faulty signature to be entirely broken provided that no DFA countermeasures are in use. Usually the easiest approach for the attacker is to introduce a fault in one of the two RSA-CRT exponentiations. These ...

Existing studies show that several performance issues will arise in the HVDC link during three phase-to-ground fault at side of inverter and DC voltage oscillate around zero not affect rectifier AC system though system, voltages become currents high amplitude as well minor disturbances. It has also been argued when is applied on a single-phase to ground side, decrease. In this paper, we focus s...

A distributed system is fault-tolerant if it continues to perform correctly even when a subset of the processes becomes faulty. Faulttolerance is highly desirable but often difficult to implement. In this paper, we investigate fault-tolerant synthesis, i.e., the problem of determining whether a given temporal specification can be implemented as a fault-tolerant distributed system. As in standar...