On the Study of
Overhead Reduction for Confused Document Encrypting Schemes
Tzu-Jung Yao and
Quincy Wu Department of Computer Science and Information Engineering National
Chi Nan University, Nantou 54561, Taiwan E-mail:
{s95321040.solomon}@ncnu.edu.tw
Abstract
Confused Document
Encrypting Scheme is a technique for data hiding. It involves concealing the
secret text inside the cheating text. If the cheating text is intercepted, the
secret text may still be undetected. This study focuses on reducing the amount
of data transmission in delivering confused documents. We can use any article
on the internet as a cheating text. The sender only needs to transmit the
encrypted Uniform Resource Locator (URL), and then the receiver can follow the
URL and download the cheating text. This avoids transmitting large amounts of
cheating text, which is a major drawback of traditional confused document encrypting
schemes. In this paper, we proposed a new approach which can improve existing
confused document encrypting schemes by reducing their transmission overhead,
and thus makes it suitable for wireless environment with low data rate.
Keywords: Big5 code, CDES, data hiding
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