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1. 西安电子科技大学网络与信息安全学院,陕西 西安 710071
2. 腾讯科技(深圳)有限公司,广东 深圳 518057
Online First:2019-04,
Published:15 April 2019
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Qixuan WU, Jianfeng MA, Cong SUN. Information flow integrity measurement method using integrity threat tree[J]. Chinese Journal of Network and Information Security, 2019, 5(2): 50-57.
Qixuan WU, Jianfeng MA, Cong SUN. Information flow integrity measurement method using integrity threat tree[J]. Chinese Journal of Network and Information Security, 2019, 5(2): 50-57. DOI: 10.11959/j.issn.2096-109x.2019016.
针对传统信息流完整性分析方法缺乏对具体系统结构及关联性攻击事件考虑的缺陷,提出完整性威胁树对系统信息流完整性做量化分析,提出条件触发门对存在关联的攻击事件进行建模。使用攻击代价来量化攻击各信道的难易度,依据架构相关的完整性威胁树,利用可满足性模理论及其工具求解最小攻击代价,以量化分析系统完整性威胁。通过对实际飞控系统模型的建模分析求解说明方法的实用性,并得出条件触发门参数对系统完整性的影响。
In order to avert the drawback of traditional information flow integrity analysis on ignoring the specific system architecture and associated attack events
an integrity threat tree to quantify the integrity of the system information flow
and the conditional trigger gate to model the associated attack events were proposed.The attack cost was used to quantify the degree of difficulty on attacking each channel.According to the architecture-related integrity threat tree
the minimum attack cost and corresponding target channel set required to achieve the attack target were solved by using the satisfiability modulo theories.The practicality of our approach was demonstrated by the modeling and analysis of the actual flight control system models
and the influence of the conditional trigger gate parameters on the system integrity was discussed.
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