New Anatomy of Trustworthy Mobile Cloud Computing

Abstract

Nowadays, Mobile Cloud Computing (MCC) is widely accepted as a concept that can significantly improve the user experience when accessing mobile services. For MCCs, a stable and reliable topology is an important research topic. However, the problem of reaching consensus in the distributed system is one of the most important issues to design a fault-tolerance system. The protocols of reaching consensus are required so that the distributed system still can be well performed even if certain components in the system were failed. In this study, the Trusted Timely Computing Base (TTCB) is used when the message is transmitted. However, the consensus problem is revisited with the assumption of transmission medium failure on malicious faults in the Cluster-based MCC in this study. The proposed protocol, Trustworthy MCC (TMCC), can make all fault-free nodes reaching consensus with minimal rounds of message exchanges and tolerate the maximal number of allowable faulty components.

Reaching Byzantine Agreement underlying VANET

“… The reliability of VANET is improved by allowing Byzantine-damaged PEs, dormant-damaged PEs, and absent PEs exist simultaneously. [27] * OM [7] * PSL [8] * Algorithms using authentication [9] * MS [10] * * EMAP [11] * OAP [12] * OGBA [13] * * MVSAP [14] * TMCC [15] * DFP [16] * * RTAP * * B: Byzantine-damaged, H: Hybrid-damaged In the future, the proposed protocol will be simulated and the results will be compared to other past agreement protocols. In addition, only considering the PE damaged in the BA problem is insufficient for high reliable VANET.…”

“…Classic BA problems are considered for synchronous fixed networks where the boundaries of processing and transmission delays for normal components are proper [8].In the research of Dolev and Reischuk, they proved that there is only one damaged PE, and the protocol in the asynchronous network is impossible [9]. Since VANET is an asynchronous network, the results of previous research on BA issues [10][11][12][13][14][15][16] cannot be directly used to solve BA problems in asynchronous VANET. Chandra and Toueg have proposed a fault detector [17] that can be used to detect asynchronous PEs in VANET To ensure fault tolerance and reliability in VANET, the BA problem in asynchronous VANET will be revisited in this study.…”

Reliability Enhancement of Edge Computing Paradigm Using Agreement

“…Namely, the goal of agreement is making the fault-free nodes reach a common value. There are three kinds of agreement issues, Byzantine agreement [6,15], consensus [16], and interaction consistency (IC) [17][18] (Wang et al, 2018). In our study, the consensus problem of the MEC-layer and the IC problem of the CC-layer in MIoT will be explored separately.…”

“…In a distributed computing system, the nodes that are allocated to different locations or separate units are connected together so that they can be used together for greater advantages. In many cases, reaching a common agreement in the presence of faulty components is the central issue of fault-tolerant distributed computing, because many applications require such agreement [5,6]. For instance, the initial time and the time stamps of many applications and smart devices in the smart city system should be the same, including traffic light control components in the traffic automatic control system, switches and brightness adjusters in the street light management system, computers for intelligent self-driving vehicles, detection components of fire-disaster relief vehicles, etc.…”