An efficient image encryption scheme for TMIS based on elliptic curve integrated encryption and linear cryptography
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An efficient image encryption scheme for TMIS based on elliptic curve integrated encryption and linear cryptography Mustapha Benssalah1
· Yesser Rhaskali1 · Karim Drouiche2
Received: 31 March 2020 / Revised: 18 August 2020 / Accepted: 28 August 2020 / © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Nowadays, diagnosing patient diseases remotely is a routine and digital medical images analysis as a part of Telecare Medical Information Systems (TMIS) play a fundamental role in early diagnosing and treating most common and serious diseases such as breast cancer. In this context, altering or distorting even a single pixel of a medical image during its transmission over an unsure channel could lead to a wrong diagnosis and harm patient health, induce damaging delays. Therefore the security and privacy of the transmitted medical images must be addressed most seriously. Several techniques are proposed in the literature to address these issues using different techniques such as chaos theory, more recently, elliptic curves cryptography (ECC) or improved classical methods such as linear cryptography. In this paper, we address the security level concern of an image encryption technique combining ECC with Hill cipher (ECCHC) which has been recently proposed by Dawahdeh et al [13]. Our study rises concerns about some weaknesses and flaws of the analyzed encryption scheme against some plain-text and known plain-text attacks. In addition, and not least issue, it is found that the key length used in Dawahdeh et al. scheme is not sufficiently large to be robust against brute force attack. To fix the found flaws and to improve the encryption scheme, a generalized cryptosystem is suggested. In the enhanced version, the key matrix negotiation is redefined to a cipher that combines a modified EC Integrated Encryption Scheme (ECIES) and the linear multiplication matrix is generalized to key matrix of (2n × 2n), n > 2 to counter efficiently the exhaustive search attack. The effectiveness of the proposed version is evaluated and verified through extensive experimentation and most recent available security tools. Compared with the state-of-the art techniques, the proposed version exhibits excellent security features and can resist to various knowing attacks. Keywords Image encryption · Elliptic curves · DICOM · ECIES · Chaos · Hill cipher
Mustapha Benssalah
[email protected] 1
Signal Processing Laboratory, Ecole Militaire Polytechnique, BP 17 Bordj El Bahri 16111 Algiers, Algeria
2
LIK Neuville Sur Oise, Cergy Pontoise University, Cergy-Pontoise CEDEX, France
Multimedia Tools and Applications
1 Introduction E-healthcare is a digital medical care practice and its surge is due to the prodigious entrance of telecommunication and information systems into the healthcare infrastructures. In fact, many benefits were gained by the different tele-health applications such as remote prescription verification and drug administration, remote consultation diagnosis, medical remote-distance learning, etc. [36].
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