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Browsing by Author "El Assad, Safwan"

Browsing by Author "El Assad, Safwan"

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  • An efficient pseudo chaotic number generator based on coupling and multiplexing techniques 
    Jallouli, Ons; El Assad, Safwan; Abutaha, Mohammed; Chetto, Maryline; Lozi, René; Caragata, Daniel (2016)
    ryptosystems require a very good and secure source of randomness for their security. Such a source is extremely difficult to obtain in practice. Hence, developing a secure pseudo-random number generator reveals necessary. ...
  • Chaos-based block ciphers: An overview 
    El Assad, Safwan; Farajallah, Mousa; Vladeanu, Calin (The 10th International Conference on Communications (COMM), 2014-05-29)
    A variety of chaos-based cryptosystems have been investigated during the last decade. Most of them are based on the structure of Fridrich, which is based on the traditional confusion-diffusion architecture proposed by ...
  • Chaos-based Cryptography an Emergent Technology 
    El Assad, Safwan; Abutaha, Mohammed; Farajallah, Mousa; Déforges, Olivier (2017)
     What is chaos? - How to generate it?chaos? How to generate it? - Chaos & Cryptography - Why using chaos to secure information? - Chaos--based cryptography *Design and realization of an efficient chaos--based stream cipher ...
  • Chaos-based cryptosystems using dependent diffusion: An overview 
    Abutaha, Mohammed; El Assad, Safwan; Farajallah, Mousa; Queudet, Audrey; Deforge, Olivier (2015 10th International Conference for Internet Technology and Secured Transactions (ICITST), 2015-12-14)
    Based on some important properties of chaos, such as ergodicity, quasi-randomness, and high sensitivity to the secret key, chaos is a hot research field in secured communication, and recently a variety of chaos-based ...
  • Chaos-based cryptosystems using dependent diffusion: An overview 
    Abutaha, Mohammed; El Assad, Safwan; Farajallah, Mousa; Queudet, Audrey; Deforge, Olivier (IEEE, 2015)
    Based on some important properties of chaos, such as ergodicity, quasi-randomness, and high sensitivity to the secret key, chaos is a hot research field in secured communication, and recently a variety of chaos-based ...
  • Comparative study of two pseudo chaotic number generators for securing the iot 
    Jallouli, Ons; Abutaha, Mohammed; El Assad, Safwan; Chetto, Maryline; Queudet, Audrey; Déforges, Olivier (IEEE, 2016)
    The extremely rapid development of the Internet of Things brings growing attention to the information security issue. Realization of cryptographically strong pseudo random number generators (PRNGs), is crucial in securing ...
  • Cryptanalyzing an image encryption scheme using reverse 2-dimensional chaotic map and dependent diffusion 
    Farajallah, Mousa; El Assad, Safwan; Déforges, Olivier (Multimedia Tools and Applications-Springer US, 2018-11-10)
    In the recent literature, many research studies have proven that Known and Chosen plaintext attacks are very efficient tools that are widely used to cryptanalyze partially or completely some chaos-based and non-chaos ...
  • Design and efficient implementation of a chaos-based stream cipher 
    Abutaha, Mohammed; El Assad, Safwan; Queudet, Audrey; Deforges, Olivier (inderscience, 2017-02-08)
    We designed and implemented a stream cipher cryptosystem based on an efficient chaotic generator of finite computing precision (N = 32). The proposed structure of the chaotic generator is formed by a Key-setup, an IVsetup, ...
  • Design and Efficient Implementations of a Chaos-based stream cipher for Securing Internet of Things 
    Gautier, Guillaume; El Assad, Safwan; Abutaha, Mohammed; Déforges, Olivier; Facon, Adrien (2017)
    The protection of data transmitted between Internet of Things(IoT) devices which have very limited resources in terms of computing capabilities, memory capacities and energy becomes an important challenge. Designing ...
  • Design of a pseudo-chaotic number generator as a random number generator 
    Abutaha, Mohammed; El Assad, Safwan; Jallouli, Ons; Queudet, Audrey; Deforges, Olivier (IEEE, 2016)
    Generating random numbers is essential in many cryptographic applications like key generation, protocols, nonce and also in Internet for choosing TCP sequence numbers for example. We need generators which are able to ...
  • Dynamic adjustment of the chaos-based security in real-time energy harvesting sensors 
    Farajallah, Mousa; El Assad, Safwan; Chetto, Maryline (2013 IEEE International Conference on Green Computing and Communications and IEEE Internet of Things and IEEE Cyber, Physical and Social Computing, 2013-08-20)
    Wireless Sensor Networks (WSNs) are a growing field of research since they are used in many applications. Nevertheless, they are subject to many requirements such as real-time constraints, energy limitations, and security ...
  • Efficient image encryption and authentication scheme based on chaotic sequences 
    Farajallah, Mousa; Fawaz, Zeinab; El Assad, Safwan; Deforges, Olivier (The 7th International Conference on Emerging Security Information, Systems and Technologies, 2013-08-25)
    Many image encryption algorithms based on chaos have been proposed since 1989. Most of them are slow and use a secret key of encryption/decryption independent of the plain image. We introduce a new fast and secure image ...
  • Fast and secure chaos-based cryptosystem for images 
    Farajallah, Mousa; Deforges, Olivier; El Assad, Safwan (International Journal of Bifurcation and Chaos in Applied Sciences and Engineering, 2016-02-01)
    Nonlinear dynamic cryptosystems or chaos-based cryptosystems have been attracting a large amount of research since 1990. The critical aspect of cryptography is to face the growth of communication and to achieve the design ...
  • Hash function based on efficient chaotic neural network 
    Abdoun, Nabil; El Assad, Safwan; Abutaha, Mohammed; Assaf, Rima; Deforges, Olivier; Khalil, Mohamad (IEEE, 2015)
    This paper presents an efficient algorithm for constructing a secure Hash function based on Chaotic Neural Network structure. The proposed Hash function includes two main operations: Generation of Neural Network parameters ...
  • How to guarantee secured transactions with QoS and real-time constraints 
    Chetto, Maryline; Noura, Hassan; El Assad, Safwan; Farajallah, Mousa (2012 International Conference for Internet Technology and Secured Transactions, 2012-12-20)
    Abstract: A growing number of systems are highly connected and distributed over the internet. These systems require innovative software services and infrastructures in order to guarantee security and reliability. This ...
  • Image-based Ciphering of Video Streams and Object Recognition for Urban and Vehicular Surveillance Services 
    Hammoudi, Karim; Abutaha, Mohammed; Benhabiles, Halim; Melkemi, Mahmoud; Windal, Feryal; El Assad, Safwan; Queudet, Audrey (Springer, Singapore, 2020)
    Nowadays, urban and vehicular surveillance systems are collecting large amounts of image data for feeding recognition systems, for example, toward proposing localization or navigation services. In many cases, these image data ...
  • A lightweight chaos-based cryptosystem for dynamic security management in real-time overloaded applications 
    Chetto, Maryline; El Assad, Safwan; Farajallah, Mousa (International Journal of Internet Technology and Secured Transactions, 2014-01-01)
    A growing number of systems are highly connected and distributed over the internet. These systems require innovative software services and infrastructures in order to guarantee security and reliability. This issue has a ...
  • Lightweight chaos-based cryptosystem for secure images 
    Fawaz, Zeinab; El Assad, Safwan; Farajallah, Mousa; Ayman, Khalil; Lozi, René; Déforges, Olivier (8th International Conference for Internet Technology and Secured Transactions (ICITST-2013), 2013-12-09)
    In the last two decades, several chaos-based cryptosystems have been proposed. Some of them have architecture comprising a layer of permutation and a layer of diffusion and these layers are simultaneously executed in a ...
  • A new chaos-based image encryption system 
    El Assad, Safwan; Farajallah, Mousa (Signal Processing: Image Communication-Elsevier, 2016-02-29)
    During the last decade, a variety of chaos-based cryptosystems has been introduced to protect the content of the transmitted images. In this paper, we propose a new fast, simple, and robust chaos-based cryptosystem ...
  • Real-time selective video encryption based on the chaos system in scalable HEVC extension 
    Farajallah, Mousa; El Assad, Safwan; Déforges, Olivier; Hamidouche, Wassim; Sidaty, Naty (Signal Processing: Image Communication, 2017-10-01)
    In this paper we propose a real-time selective video encryption solution in the scalable extension of High Efficiency Video Coding (HEVC) standard, referred to as SHVC. The proposed scheme encrypts a set of sensitive SHVC ...

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