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arXiv 2209.02676cs.CRcs.AIcs.DB
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协作网络安全:分布式隐私保护威胁情报共享的安全框架

Orchestrating Collaborative Cybersecurity: A Secure Framework for Distributed Privacy-Preserving Threat Intelligence Sharing

Tune Insight SA(Tune Insight股份公司);Cyber-Defence Campus, armasuisse Science and Technology(瑞士国防装备采购局科技处网络防御园区);École polytechnique fédérale de Lausanne (EPFL)(洛桑联邦理工学院)

Juan R. Trocoso-Pastoriza, Alain Mermoud, Romain Bouyé, Francesco Marino, Jean-Philippe Bossuat, Vincent Lenders, Jean-Pierre Hubaux

摘要:

网络威胁情报(CTI)共享是减少攻击者和防御者之间信息不对称的重要活动。然而,由于数据共享和保密性之间的紧张关系,这一活动带来了挑战,导致信息保留往往导致搭便车问题。因此,共享的信息仅代表冰山一角。目前的文献假设可以访问包含所有信息的中央数据库,但由于上述紧张关系,这并不总是可行的。这会导致不平衡或不完整的数据集,需要使用技术来扩展它们;我们展示了这些技术如何导致有偏见的结果和误导性的性能预期。我们提出了一种新的框架,用于从分布式数据中提取CTI事件,漏洞和指标的妥协,并展示了它的使用在几个实际情况下,与恶意软件信息共享平台(MISP)。CTI共享的政策影响和讨论。所提出的系统依赖于隐私增强技术和联邦处理的有效组合。这使组织能够控制其CTI并最大限度地降低暴露或泄漏的风险,同时实现共享、更准确和更具代表性的结果以及更有效的预测性和预防性防御的好处。

英文摘要:

Cyber Threat Intelligence (CTI) sharing is an important activity to reduce information asymmetries between attackers and defenders. However, this activity presents challenges due to the tension between data sharing and confidentiality, that result in information retention often leading to a free-rider problem. Therefore, the information that is shared represents only the tip of the iceberg. Current literature assumes access to centralized databases containing all the information, but this is not always feasible, due to the aforementioned tension. This results in unbalanced or incomplete datasets, requiring the use of techniques to expand them; we show how these techniques lead to biased results and misleading performance expectations. We propose a novel framework for extracting CTI from distributed data on incidents, vulnerabilities and indicators of compromise, and demonstrate its use in several practical scenarios, in conjunction with the Malware Information Sharing Platforms (MISP). Policy implications for CTI sharing are presented and discussed. The proposed system relies on an efficient combination of privacy enhancing technologies and federated processing. This lets organizations stay in control of their CTI and minimize the risks of exposure or leakage, while enabling the benefits of sharing, more accurate and representative results, and more effective predictive and preventive defenses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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