Abstract
A novel image encryption algorithm is designed based on autoblocking and a medical electrocardiography (ECG) signal. The method uses a chaotic logistic map and a generalized Arnold map. To solve deterministic input problems, the method uses an ECG signal and the Wolf algorithm to generate initial conditions for the chaotic maps. Compared with traditional cryptoarchitectures, this system performs the autoblocking diffusion operation only in the encryption process. The keystream is generated by a control parameter produced from the plain-image, which has proven to be secure against chosen-plaintext and known-plaintext attacks. Experimental results show that the proposed algorithm can achieve high security with good performance.
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