Development of Visible Anti-copy Patterns(2004)

Development of Visible Anti-copy Patterns

JongWeon Kim, KyuTae Kim, JungSoo Lee, and JongUk Choi

Abstract. Today, many governments try to implement e-government to provide
one stop service through digitization of conventional document and providing
public service through cyber systems. However, the last and the most difficult
problem with the current e-government projects is that the government cannot
provide on-line solution for issuing government certificates through cyber operations,
because of the possible forgery and illegal modifications.
In this research, an algorithm of generating visible anti-copy patterns is suggested
to issue government certificates or bank certificates in cyber space. In
this scheme, people can print certificates at home or in office using ordinary
printers. Visible anti-copy patterns provide a solution to distinguish copied
documents from original ones through naked eyes. In order to generate visible
anti-copy patterns, this research examines characteristics of digital image input
and output devices. Different from traditional anti-forgery methods that need
special equipment, visible anti-copy patterns developed in this research can be
easily recognized with naked eyes whether the document is originally printed or
it is copied or scanned and printed.

Development of Visible Anti-copy Patterns