Paper Encryption Technology
Taizo Anan, Kensuke Kuraki, J. Takahashi · Fujitsu Scientific and Technical Journal · 2010
In Japan, since the Act on the Protection of Personal Information was fully enforced in April 2005, companies and other parties have developed various measures to prevent leaks of information. Such measures include preventing information leaks by not printing documents whenever possible, keeping logs of people who print documents, and using electronic watermark technology that can embed tracking information such as IDs in printed material. However, not printing documents may not be possible in some services and may be inconvenient. While electronic watermarks are useful for tracking people who have leaked information, they are not effective for preventing the information leaks themselves. To prevent information leaks while allowing documents to be printed, Fujitsu Laboratories has pioneered a paper encryption technology. With this technology, only those who know the password can access information that is encrypted and hidden in printed material. This report introduces an outline of our paper encryption technology together with its uses and areas of application.