计算机科学
互惠的
块链
计算机安全
方案(数学)
过程(计算)
密码学
链条(单位)
机制(生物学)
分布式计算
互联网隐私
认识论
哲学
数学分析
物理
操作系统
天文
语言学
数学
作者
Zheng Yan,Li Peng,Wei Feng,Laurence T. Yang
出处
期刊:ACM Transactions on Internet Technology
[Association for Computing Machinery]
日期:2021-01-05
卷期号:21 (1): 1-28
被引量:39
摘要
Pervasive Social Networking (PSN) supports online and instant social activities with the support of heterogeneous networks. Since reciprocal activities among both familiar/unfamiliar strangers and acquaintances are quite common in PSN, it is essential to offer trust information to PSN users. Past work normally evaluates trust based on a centralized party, which is not feasible due to the dynamic changes of PSN topology and its specific characteristics. The literature still lacks a decentralized trust evaluation scheme in PSN. In this article, we propose a novel blockchain-based decentralized system for trust evaluation in PSN, called Social-Chain. Considering mobile devices normally lack computing resources to process cryptographic puzzle calculation, we design a lightweight consensus mechanism based on Proof-of-Trust (PoT), which remarkably improves system effectivity compared with other blockchain systems. Serious security analysis and experimental results further illustrate the security and efficiency of Social-Chain for being feasibly applied into PSN.
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