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Characteristic of Yellow Dots that detected on Color Laser Printer

컬러 레이저 프린터에서 검출되는 Yellow Dots의 특성 : HP 컬러 레이저 프린터를 중심으로

  • 최영호 (대검찰청 과학수사담당관실 문서감정실) ;
  • 이덕호 (대검찰청 과학수사담당관실 문서감정실) ;
  • 윤영미 (대검찰청 과학수사담당관실 문서감정실) ;
  • 홍현식 (대검찰청 과학수사담당관실 문서감정실) ;
  • 신종연 (대검찰청 과학수사담당관실 문서감정실) ;
  • 윤기형 (대검찰청 과학수사담당관실 문서감정실)
  • Received : 2012.09.25
  • Accepted : 2012.11.14
  • Published : 2012.12.28

Abstract

To analyzed the shape of Yellow Dots which appeared on the paper printed HP color laser printer, and analyzed the characteristic of Yellow Dots according to time, month, year and same printers. As a result, documents that printed in same printers had an identical Yellow Dots's shapes according to time, month, year. It was presupposed that was not embedded time and date information in HP Color LaserJet printers against Xerox, and printers which have different serial number had similar shapes but it was not identical Yellow Dots. Finally, it was found to be identical patterns in Yellow Dots of HP Color LaserJet printers used analysis. Depending on the results, it could understand HP's pattern. In the future, it will decipher patterns of Yellow Dots which have other informations to include other printer manufacturer.

Keywords

Color Laser Printer;Laser Printer;Yellow Dots;Yellow Dots Pattern;Printer Embedding

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