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Using Digital Forensic Techniques to Identify Contract Cheating: A Case Study

机译：使用数字法医技术来识别合同作弊：案例研究

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摘要

Contract cheating is a major problem in Higher Education because it is very difficult to detect using traditional plagiarism detection tools. Digital forensics techniques are already used in law to determine ownership of documents, and also in criminal cases, where it is not uncommon to hide information and images within an ordinary looking document using steganography techniques. These digital forensic techniques were used to investigate a known case of contract cheating where the contract author has notified the university and the student subsequently confirmed that they had contracted the work out. Microsoft Word documents use a format known as Office Open XML Format, and as such, it is possible to review the editing process of a document. A student submission known to have been contracted out was analysed using the revision identifiers within the document, and a tool was developed to review these identifiers. Using visualisation techniques it is possible to see a pattern of editing that is inconsistent with the pattern seen in an authentic document.
机译：合同作弊是高等教育中的一个主要问题，因为使用传统的抄袭检测工具非常困难。数字取证技术已经用于法律，以确定文件的所有权，以及在刑事案件中，在使用隐写技术中隐藏普通的文档中的信息和图像并不罕见。这些数字法医技术用于调查一例已知的合同作弊，合同作者已通知大学，学生随后证实他们已签订了劳动。 Microsoft Word文档使用称为Office Open XML格式的格式，因此，可以查看文档的编辑过程。已知已知已收缩的学生提交使用文档中的修订标识符进行分析，并开发了一个工具来审核这些标识符。使用可视化技术可以看到与在真实文档中看到的模式不一致的编辑模式。

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