Chaos-based 2D Visual Encryption Mechanism for ECG Medical signals

Abstract

Abstract:Encryption is a necessary mechanism for secure data storage and transmission. Chaosbased encryption is an important encryption mechanism that is used for audio, image, video, electroencephalograms (EEG), and electrocardiographs (ECG) multimedia signals. Chaos sequences are popular because they increase unpredictability more than other types of random sequences. We have developed a two-dimensional (2D) chaos-based encryption scheme that can be applied to signals with transmission bit errors in clinical electroencephalography (ECG) and mobile telemedicine. We used a 2D chaotic scrambler and a 2D permutation scheme to achieve ECG visual encryption. The visual encryption mechanism was realized by first scrambling the input ECG signal values, then multiplying a chaotic 2D address scanning order encryption to randomize reference values. Simulation results show that when the correct deciphering parameters are entered, ECG signal with a transmission bit error rate of 7 10 are completely recovered; furthermore, the percent root-mean-square difference values for clinical ECG signals is 0.2496%. However, when there is an input parameter error, for example, an initial point error of 0.00000001%, these clinical ECG signals become unrecoverable. The proposed chaos-based 2D encryption is well suited for applications to clinical ECG signals.