Binary Image Data Hiding Using Matrix Encoding Technique in Sensors

Phan Trung Huy,Cheonshik Kim

doi:10.1155/2013/340963

Abstract

It is very important to protect the copyright of digital images in wireless transmission, because people often use a smart phone in their daily life. Traditional security schemes are computationally expensive, and they introduce overhead, which shortens the life of the image sensors. In this paper, we present an Improved Matrix Encoding (IME) scheme for hiding data into a two-color binary image. Our proposed scheme improved the CPT scheme. In the CPT scheme, each block F of [Formula: see text] pixel of G is changed by at most two pixels for hiding data. CPT scheme's embedding rate is [Formula: see text]. The IME scheme is shown approximately as a [Formula: see text] embedding rate, while Tseng-Pan's modified CPT scheme (MCPT) is an [Formula: see text] embedding rate. Therefore, IME's embedding rate is higher than that of the MCPT scheme. In our experiment, we demonstrate that our proposed schemes are superior to those of the CPT and MCPT schemes.

Highlights

The fundamental requirements of Wireless Sensor Network (WSN) in sensitive areas are a secure [1,2,3,4,5,6,7,8,9] image transmission
Our proposed schemes use the block-wise method; Table 1 shows the comparison of block-wise methods, such as Maximal Secret Data Ratio (MSDR), CPT, modified CPT scheme (MCPT), and Improved Matrix Encoding (IME)
For the IME scheme, we assume that matrix F is a block of size m × n, q = m × n, and k > 1, which is the number of colors

Summary

Introduction

The fundamental requirements of Wireless Sensor Network (WSN) in sensitive areas are a secure [1,2,3,4,5,6,7,8,9] image transmission. The CPT (Chen, Pan, and Tseng) scheme [24] was the first scheme based on the block-wise technique This scheme is a good method for high-rate embedding of goodquality images. CPT is based on the pixel block scheme (its embedding rate is r = ⌊log2(q + 1)⌋ and secret bits can be hidden in each block F of size q = m × n by flipping two pixels at most), which has been studied by many researchers [20, 24,25,26,27]. We propose a binary datahiding method based on a block-wise scheme: the Improved Matrix Encoding (IME) scheme. The rest of this paper is organized as follows: Section 2 reviews the CPT scheme; Section 3 presents our proposed IME scheme and considers the relationship between our approaches; Section 4 shows the experimental results of our evaluation; Section 5 presents a summary of our findings as well as future directions of study

CPT Scheme

Data-Hiding IME Scheme

Experimental Results

Conclusion