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J Med Syst. 2017 Oct 18;41(12):187. doi: 10.1007/s10916-017-0830-4.

An Integrated Approach Using Chaotic Map & Sample Value Difference Method for Electrocardiogram Steganography and OFDM Based Secured Patient Information Transmission.

Author information

1
Department of Electronics and Communication Engineering, Dr B R Ambedkar National Institute of Technology, Jalandhar, PIN:144011, India. anukul66@gmail.com.
2
Department of Electronics and Communication Engineering, Dr B R Ambedkar National Institute of Technology, Jalandhar, PIN:144011, India.
3
Department of Electronics and Communication Engineering, Guru Nanak Dev University, Regional Campus, Jalandhar, PIN:144007, India.

Abstract

This paper presents a patient's confidential data hiding scheme in electrocardiogram (ECG) signal and its subsequent wireless transmission. Patient's confidential data is embedded in ECG (called stego-ECG) using chaotic map and the sample value difference approach. The sample value difference approach effectually hides the patient's confidential data in ECG sample pairs at the predefined locations. The chaotic map generates these predefined locations through the use of selective control parameters. Subsequently, the wireless transmission of the stego-ECG is analyzed using the Orthogonal Frequency Division Multiplexing (OFDM) system in a Rayleigh fading scenario for telemedicine applications. Evaluation of proposed method on all 48 records of MIT-BIH arrhythmia ECG database demonstrates that the embedding does not alter the diagnostic features of cover ECG. The secret data imperceptibility in stego-ECG is evident through the statistical and clinical performance measures. Statistical measures comprise of Percentage Root-mean-square Difference (PRD), Peak Signal to Noise Ratio (PSNR), and Kulback-Leibler Divergence (KL-Div), etc. while clinical metrics includes wavelet Energy Based Diagnostic Distortion (WEDD) and Wavelet based Weighted PRD (WWPRD). The various channel Signal-to-Noise Ratio scenarios are simulated for wireless communication of stego-ECG in OFDM system. The proposed method over all the 48 records of MIT-BIH arrhythmia database resulted in average, PRD = 0.26, PSNR = 55.49, KL-Div = 3.34 × 10-6, WEDD = 0.02, and WWPRD = 0.10 with secret data size of 21Kb. Further, a comparative analysis of proposed method and recent existing works was also performed. The results clearly, demonstrated the superiority of proposed method.

KEYWORDS:

Chaotic map; Data hiding; ECG; ECG steganography; OFDM system; PVD; Sample inversion

PMID:
29043502
DOI:
10.1007/s10916-017-0830-4
[Indexed for MEDLINE]

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