Pervasive and Mobile Computing ( ) – Contents lists available at ScienceDirect Pervasive and Mobile Computing journal homepage: www.elsevier.com/locate/pmc Fast track article Secure video summarization framework for personalized wireless capsule endoscopy Rafik Hamza a , Khan Muhammad b,c , Zhihan Lv d,∗ , Faiza Titouna a a LAMIE Laboratory, Department of Computer Science, University of Batna 2, Algeria b Intelligent Media Laboratory, Department of Software, College of Software Convergence, Sejong University, Seoul, Republic of Korea c Digital Image Processing Laboratory, Department of Computer Science, Islamia College Peshawar, Pakistan d School of Data Science and Software Engineering, Qingdao University, China article info Article history: Available online xxxx Keywords: Information security Medical image analysis Wireless capsule endoscopy Image encryption Personalized healthcare systems Video summarization abstract Wireless capsule endoscopy (WCE) has several benefits over traditional endoscopy such as its portability and ease of usage, particularly for remote internet of things (IoT)-assisted healthcare services. During the WCE procedure, a significant amount of redundant video data is generated, the transmission of which to healthcare centers and gastroenterologists securely for analysis is challenging as well as wastage of several resources including energy, memory, computation, and bandwidth. In addition to this, it is inherently difficult and time consuming for gastroenterologists to analyze this huge volume of gastrointestinal video data for desired contents. To surmount these issues, we propose a secure video summarization framework for outdoor patients going through WCE procedure. In the proposed system, keyframes are extracted using a light-weighted video summarization scheme, making it more suitable for WCE. Next, a cryptosystem is presented for security of extracted keyframes based on 2D Zaslavsky chaotic map. Experimental results validate the performance of the proposed cryptosystem in terms of robustness and high-level security compared to other recent image encryption schemes during dissemination of important keyframes to healthcare centers and gastroenterologists for personalized WCE. © 2017 Elsevier B.V. All rights reserved. 1. Introduction Digital images play an important role in different areas of interest such as commercial, military, and medical applications. The security of this specific data has become a major concern in recent years for which researchers have presented numerous techniques [1,2]. Cryptography is one of the solutions for information security and is considered as one essential aspect for secure communication over the public network Internet. The security of cryptographic techniques is mainly dependent on secret keys as dictated by Kirchhoff’s principle [3,4]. These keys are of paramount importance in cryptographic applications such as image encryption [5,6] and secret stego key sharing [7–9]. Since, the cryptosystem is dependent only on the secret keys, therefore, it should be nearly impossible to retrieve the information without the exact secret keys. One of the well- known methods to generate secure cryptographic keys is to use the chaotic systems [10,11]. ∗ Corresponding author. E-mail addresses: r.hamza@univ-batna2.dz (R. Hamza), khan.muhammad@ieee.org (K. Muhammad), lvzhihan@gmail.com (Z. Lv), ftitouna@yahoo.fr (F. Titouna). http://dx.doi.org/10.1016/j.pmcj.2017.03.011 1574-1192/© 2017 Elsevier B.V. All rights reserved.