Homoglyphs restoration with deep learning - focus on optical character recognition -딥러닝을 활용한 호모글리프 복원 - 광학 문자 인식을 중심으로 -

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dc.contributor.advisorShin, Seungwon-
dc.contributor.advisor신승원-
dc.contributor.authorLee, Taehwa-
dc.date.accessioned2023-06-26T19:31:58Z-
dc.date.available2023-06-26T19:31:58Z-
dc.date.issued2022-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1008423&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/309621-
dc.description학위논문(석사) - 한국과학기술원 : 정보보호대학원, 2022.8,[iv, 31 p. :]-
dc.description.abstractHomoglyphs are a shape that is difficult to distinguish visually because it is similar or identical. Because of this characteristic, attackers use them for phishing, causing serious problems. In this paper, we deal with the countermeasures against a new type of attacks through homoglyphs. Existing homoglyph attacks consist of characters or words, and so do the corresponding countermeasures. However, since the new type contains multiple homoglyphs in the text of the scam email, a new countermeasure was needed. To this end, we present a natural language processing technique that utilizes sequence information and a method that utilizes both visual elements and sequence information compared to existing methods for restoring homoglyphs. We use accuracy and false-positive rate (FPR) as evaluation criteria to compare the existing methods with the newly proposed methods. Through comparison using multiple evaluation criteria, we show that the method using both visual judgment and sequence information converts the homoglyph most accurately.-
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectHomoglyphs▼aCyber threats▼aOptical character recognition▼aNatural language processing-
dc.subject호모글리프▼a사이버 위협▼a광학 문자 인식▼a자연어처리-
dc.titleHomoglyphs restoration with deep learning - focus on optical character recognition --
dc.title.alternative딥러닝을 활용한 호모글리프 복원 - 광학 문자 인식을 중심으로 --
dc.typeThesis(Master)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :정보보호대학원,-
dc.contributor.alternativeauthor이태화-
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