区块链技术在物联网环境下的实现研究

区块链技术原本基于由电脑组成的P2P网络中,如何将其应用于物联网中是一个值得考虑的问题。本文对物联网引入区块链技术遇到的主要挑战进行分析,并提出相应的应对思路。     

Blockchain-driven distributed consensus mechanism in defensing Byzantine attack for the Internet of spectrum device

To meet the requirement of the precisely spectrum sharing triggered by large-scale and ultra-dense deployment of mobile internet and internet of things,a framework based on blockchain technology for networking the massive personal wireless devices to form the Internet of spectrum device (IoSD) was proposed.The architecture of cloud with edge computing was proposed as the architecture of IoSD,which consists of spectrum management server,mobile base station,and personal wireless devices.The mechanism of spectrum data acquisition,spectrum block appending,spectrum data transmission,and spectrum sensing incentive,consist of basic operational mechanism of IoSD.The distributed consensus mechanism,including fusion consensus among sensing-nodes,verification consensusamong checking-nodes,and confirmation consensus among head-nodes,was applied to determine whether the spectrum data was falsified by the Byzantine attack of malicious sensing-nodesunder the hypothesis test of certain confidence.The simulation results show the effectiveness and robustness of proposed distributed consensus mechanism in preventing spectrum sensing data falsification by the malicious nodes.     

Public key searchable encryption scheme based on blockchain

Aiming at the trapdoor security problem of the public key encryption scheme,a random number constructing trapdoor and index was introduced to defend against keyword guessing attacks from the server and avoid data leakage caused by server curious behavior.Research on trusted issues of third parties,the blockchain mechanism with a searchable encryption scheme was combined,and smart contracts as trusted third parties for retrieval was used,which could prevent keyword guessing attacks inside the server and ensure retrieval.The correctness of the results,thereby limiting the malicious behavior of the server when sending data.The solution was analyzed for security and the verification scheme satisfies IND-KGA security.Experiments in real data sets,compared with other programs,prove that the program has certain advantages in time overhead.     

浅析电子签章应用安全与技术

随着信息技术的快速发展,电子签章作为数字办公系统的一种重要工具,应用范围越来越大,涉及的行业越来越广。当前电子签章的规范性不够完善,安全性令人担忧,而云密码技术与电子签章技术的结合必将促使电子签章向云端迁移,推动密码泛在化和安全服务化的发展。因此,从电子签章的规范化、安全化和云密码技术下电子签章的应用3个层面分析电子签章应用的安全与技术发展,提出了当前电子签章产品的设计思路和方向,以期为电子签章应用产品的设计提供技术参考。     

基于区块链的可信数据交换技术与应用

基于区块链的可信数据交换技术能实现去中心化网络中隐私数据的保护与流通,推动数字化时代打破“数据孤岛”壁垒。分析了可信数据交换的背景和需求,阐述了基于区块链可信数据交换及其关键技术,并结合区块链底层基础设施平台展示了应用情况。     

基于区块链的结果可追溯的可搜索加密方案

在可搜索加密方案中,无论是云端服务器还是用户,都可能存在欺骗行为。为了解决这种安全问题,给出公平性安全的定义,提出基于区块链的可搜索加密方案。通过第三方可信机构（trusted authority,TA）验证数据传输过程中数据的一致性,区块链记录完整验证结果以防止篡改,使所涉及的实体达成一致的安全共识,从而实现公平性安全。安全性与复杂性分析表明,该方案是可行的。当该方案与搜索结果可验证的可搜索加密方案相结合时,可优化成基于区块链的搜索结果可验证的可搜索加密方案,其安全性将得到进一步的提高。     

Survey of identity resolution system in industrial Internet of things

With the development of the internet of things (IoT),5G and industrial technology,industrial IoT has become a new research field.Due to the specific requirements of delay,security and stability in industrial production,the traditional DNS has limitations to meet the needs of industrial IoT because of its single identity object,rigid resolution results,and weak security.In this context,how to provide efficient,flexible and secure resolution services for universal objects has become a hot area worldwide.Firstly,we discussed the design principles and key supporting technologies of the identity resolution system in industrial IoT.Then summarized and compared the existing identity resolution systems in detail.Next,the new identity resolution schemes in academic research were introduced.Finally,the core problems and the future research trend in this field were discussed.     

区块链技术在物联网中应用研究

区块链技术在物联网中的应用在很大程度上缓解了数据隐私、网络安全等现象,为了拓展区块链技术的应用,需要相关人员重视技术研究。本文阐述了区块链技术概述、区块链技术在物联网中的应用、针对物联网的区块链底层技术研究以及区块链为物联网带来的诸多挑战,希望能够促进区块链技术的应用,从而创造更大的效益。     

5G+区块链网络分片技术

基于5G+区块链网络分片建模,仿真对比了保证分片网络可信和保证全网可信的两种网络分片方案的性能差异,分析了单点受控概率、分片可信度、分片数量、全网可信度等参数对分片规模、网络规模的影响,给出了在满足一定可信度条件下,区块链网络分片的最优规模,并提出一定网络规模下,区块链网络从保证分片网络可信向保证全网可信方案演进再向更大规模分片网络可信方案演进的路线。     

基于区块链的物联网技术应用

随着区块链技术的不断发展,其应用变得越来越普及。文章主要针对区块链的数据结构及整体架构进行分析,并审视了区块链为物联网带来的挑战;最后从物联网数据交易系统方面、电网管理方面、车联网方面以及防伪安全管理方面,细化阐述了基于区块链的物联网技术应用,以期为基于区块链的物联网技术发展提供可靠支持。