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arXiv 1302.2028cs.CR
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使用扩展指纹的基于内容的数据泄漏检测

Content-based data leakage detection using extended fingerprinting

Yuri Shapira, Bracha Shapira, Asaf Shabtai

摘要:

保护敏感信息不被未经授权的泄露是每个组织的主要关注点。作为一个组织的员工需要访问这些信息,以开展他们的日常工作,数据泄漏检测是一个必不可少的和具有挑战性的任务。无论是由恶意还是无意的错误造成的,数据丢失都可能对组织造成重大损害。指纹技术是一种基于内容的数据泄漏检测方法。在指纹识别中,提取已知机密内容的签名并将其与传出内容进行匹配,以便检测敏感内容的泄漏。然而,现有的指纹识别方法受到两个主要限制。首先,可以通过对机密内容的改写(或微小修改)来绕过指纹识别,其次,通常对文档的整个内容(包括非机密部分)进行指纹识别,从而导致错误警报。在本文中,我们提出了一个扩展的指纹识别方法,是基于排序k-skip-n-gram。所提出的方法是能够产生指纹的核心机密内容,忽略不相关(非机密)部分。此外,所提出的指纹方法对改写更鲁棒,并且还可以用于检测先前看不见的机密文档,因此提供对故意泄漏事件的更好检测。

英文摘要:

Protecting sensitive information from unauthorized disclosure is a major concern of every organization. As an organizations employees need to access such information in order to carry out their daily work, data leakage detection is both an essential and challenging task. Whether caused by malicious intent or an inadvertent mistake, data loss can result in significant damage to the organization. Fingerprinting is a content-based method used for detecting data leakage. In fingerprinting, signatures of known confidential content are extracted and matched with outgoing content in order to detect leakage of sensitive content. Existing fingerprinting methods, however, suffer from two major limitations. First, fingerprinting can be bypassed by rephrasing (or minor modification) of the confidential content, and second, usually the whole content of document is fingerprinted (including non-confidential parts), resulting in false alarms. In this paper we propose an extension to the fingerprinting approach that is based on sorted k-skip-n-grams. The proposed method is able to produce a fingerprint of the core confidential content which ignores non-relevant (non-confidential) sections. In addition, the proposed fingerprint method is more robust to rephrasing and can also be used to detect a previously unseen confidential document and therefore provide better detection of intentional leakage incidents.

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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