| Summary: | 碩士 === 國立中央大學 === 企業管理研究所 === 97 === Nowadays, people use E-mail as the main media to transfer messages. However, while e-mail is convenience for people, it also brings out many problems of security. Internet crimes like account usurping, data stealing are getting worse. Therefore, a method to identify e-mail sources efficiently is urgently necessary.
Authorship Identification can base on the style features of articles to provide the most possible writers. It can be used to identify the original writer by judging dubious style features of an e-mail. But, there aren’t many researches that focus on identifying e-mail writers right now. They all have a chief defect of low efficiency. Moreover, some of them can be only used in specific circumstances. Hence, a defect of low suitability appears as well.
To take both high efficiency and suitability into consideration, this research provides an algorithm: UserProtector. Duo to other methods need to scan all content of one e-mail, UserProtector only scan the e-mail subject. Consequently, it has an advantage of high efficiency. Further, by evolving Character n-grams to extract style features, every kind of circumstances can be extracted style features efficiently. For this reason, it has an advantage of high suitability.
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