Securely data hiding and transmission in an ECG signal using DWT

For aged population and those suffering from cardiac disorders, remote ECG monitoring system needs to be established in point of care system. It is essential to maintain patient confidentiality while transmitting data over public network and storing that information at hospital servers securely. This work, Secured Data Transmission via ECG Signal combines encryption and scrambling matrix technique using Discrete Wavelet Transform to secure patient confidential information. The encryption method hides patient confidential information using scrambling matrix and the shared key thereby generating watermarked ECG signal. To extract patient secret information from the ECG signal, decryption method is used using the same shared key and scrambling matrix. To evaluate diagnosability, wavelet weighted percentage residual difference measurements(WWPRD) and extracted Wavelet weighted percentage residual difference measurements(WWPRDE) is used for analysis.