利用多數同位檢查降低像素修改量之資訊隱藏

Abstract

資訊隱藏是資訊安全領域裡，一個大家所熟知的領域，而如何在不被發覺的情形下將一段資料隱藏到一個檔案中，一直是資訊隱藏裡最重要的議題。不幸的是，在隱藏資訊的過程中，勢必需要對檔案做一些更改，這些更改會造成圖形上的失真，使得被隱藏的資訊容易被發現。所以我們提出了一個方法，能有效的降低在隱藏過程中所需要做的修改量，利用樹狀結構與多數同位檢查來有效的降低資訊修改量，以隱藏一段資訊。因此本研究方法是一個可以用來幫助現有的大多數資訊隱藏方法的線性嵌入程序。

Steganography is a well-known topic in Information Security. In Steganography, how to embed a data into host file without being detected is the most important issue. Unfortunately, embedding process will make some modification in host file. For a digital image, pixel modification makes distortion and more distortion makes the embedded data be detected easily. So, we propose a scheme that can reduce pixel modification efficiently to decrease distortion caused by embedding process. By a tree structure and Majority Parity Check(MPC), to reduce pixel modification when hiding a data. Our scheme is a plug-in linear process to help most existing data hiding algorithms.