Review on safety barrier models for blockchain technology applications

doi:10.16265/j.cnki.issn1003-3033.2024.10.1891

Abstract

Abstract:

In the application process of blockchain technology, insufficient attention has been paid to the research on safety barriers that are more suitable for preventing complex system safety problems. To solve this problem, firstly, the safety requirements of blockchain itself and the support of safety barrier theory were introduced, which was combined with the security application of blockchain technology in the industrial field. Then, the main safety barrier models within qualitative and quantitative perspectives were summarized, so were the progress of security analysis model of software system and of performance evaluation of safety barrier. Then, the research status of safety precautions related to security risks of blockchain technology was summarized. Finally, in accordance with the trend of coupling coordination in safety barrier models, a research framework of safety barrier models related to the application of blockchain technology was put forward, which was based on the research progress of quantitative methods studying complex system coupling coordination and complex causal mechanism. It was a framework system including safety analysis, situational construction, system modeling, mechanism analysis, effect assessment and implementation path. The results show that the research on the safety barrier models related to blockchain technology should cover static series diagram pattern with Bow-Tie model as core and ARAMIS(Accidental Risk Assessment Methodology for Industries System) and coupling perspective STAMP (Systems Theoretic Accident Model and Processes) models as integrators, dynamic evolution mechanism research that includes dynamic Bayesian network analysis by transforming the static models into BN, and the effect assessment of safety barrier system. The study on coupling coordination and nonlinear causal analysis focusing on entropy deepen this coupling integration research system.

Key words: blockchain, safety barrier, coupling coordination, causal relationship, effect assessment, Bayesian network (BN)

CLC Number:

LIU Zhenggang, LIU Chenxi, RUAN Yuanpeng. Review on safety barrier models for blockchain technology applications[J]. China Safety Science Journal, 2024, 34(10): 105-115.

Figures/Tables 6

Table 1

Comprehensive blockchain safety risk categories

风险	描述	类型	所涉应用场景
网络攻击	区块链每秒的交易数量有限,此类攻击可能会提交超过区块链能力的交易,导致区块链不可用。用无效的大容量数据淹没节点的入站连接	拒绝服务攻击、边界网关协议劫持、通信流攻击、日蚀攻击、隐秘攻击、域名攻击	设备维护与监控;供应链管理;智能合约的应用(金融服务、版权及知识产权、房地产和租赁、股票及治理)
终端安全	终端可以是异构的也可以是同构的,前者有更多的选择来查找漏洞,后者中的漏洞存在于所有系统中	个人密钥安全、智能合约安全、访问控制、恶意挖矿、51%攻击、女巫攻击	灾害预防和应急响应;身份验证和访问控制;环境监测和数据分析;涉及硬件、软件、网络、数据和操作等多个层面
代码漏洞	由于区块链是分布式网络,漏洞影响广泛,代码一旦部署就无法修改。代码漏洞可能来自任何人都可以编写的智能合约或底层平台代码	交易依赖攻击、时间戳依赖攻击、调用深度攻击、可重入攻击、整数溢出攻击、操作异常攻击、燃料限制、交易延展性攻击、低价操纵、智能合约漏洞、未优化智能合约	智能合约的应用(金融服务、版权及知识产权、房地产和租赁、股票及治理)
数据保护	数据保护依赖于区块链的安全性,而不是数据所有者来提供数据完整性和可用性	中心化问题、后门攻击、单点问题、敏感数据泄露、隐私泄露	信息共享与协作(产品溯源、政府管理、能源管理、医疗卫生、环境保护等);安全审计和合规性;供应链管理
人的因素	日志所有者对其日志的监控、人的监管	日志记录和监控不足、安全配置错误、技术监管缺失	身份验证和访问控制;合规性记录与审计;风险评估和管理

Table 1

Fig.1

Fig.2

Table 2

Analysis focus of main models related to safety barrier and their interrelationships

模型名称	分析重点	与其他模型的关联
MORT	应用安全分析概念将事故的原因分为管理疏忽漏洞以及假定危险,以便识别安全管理工作的疏忽、失误和管理系统缺陷	在故障树分析逻辑的基础上发展
HAZOP	将分析单元划分为相应的节点,以引导词为主体,结合系统运行操作状态的变动和偏差,以便识别危及系统安全的潜在危险,辨识生产工艺的设计缺陷	—
LOPA	通过分析事故后果的严重性和发生频态参数率,量化评估现有保护措施,以便明确是否需要增加新的措施	一般在定性危害评估(如HAZOP)后应用
AcciMap	将事故影响因素映射到复杂社会技术系统各层次中,用图形分析各影响因素间的交互关系和安全性的变化过程	—
STAMP^*	重点关注整个系统表现,视系统为分层控制结构,每个层级对下一层级施加约束,通过检查每个控制结构层级的失效识别控制缺陷,适用于复杂性和耦合度较高社会技术系统	基于AcciMap模型对社会技术系统的分层进行细化和完善
FRAM	将系统分解为不同功能,认为各功能均具备可变异性,而某一要素正常变动与其他要素变化所产生的聚合效应发生耦合时可能导致共振并引发事故。通过分析系统中各功能模块的紧密耦合来解释复杂社会技术系统事故的致因机制	在传统线性模型基础上,突破事故的线性因果性思维建立非线性安全模型
蝴蝶结结构图Bow-tie	将事故原因和事故导致的后果统一起来,结合故障树与事件树来分析事故的前因后果	集成故障树与事件树
SHIPP	采用故障树表征各安全屏障的因果关系;采用事件树来描述事故从安全状态到灾难性后果的演变过程;基于贝叶斯理论分析现场异常事件数据,以便更新安全屏障失效概率	基于过程事故模型,保留故障树和事件树结合的系统分析方式并增加贝叶斯更新机制
HBA	将层次模型和贝叶斯理论相结合,在数据分组分层构建层次模型后建立相应的基于BN的概率模型	—
DBN^*	在静态BN结构上加入时间属性约束,借助不同时刻节点状态所形成的数据,反映其代表变量的发展变化趋势	—

Table 2

Fig.3

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