Scientific Published Papers: Recent submissions

  • Intervals of Special Sign Regular Matrices 
    Adm, Mohammad; Garloff, Juergen (Linear and Multilinear Algebra, 2016)
    We consider classes of n-by-n sign regular matrices, i.e. of matrices with the property that all their minors of fixed order k have one specified sign or are allowed also to vanish, k = 1,..., n. If the sign is nonpositive ...
  • Invariance of Total Positivity of a Matrix under Entry-wise Perturbation and Completion Problems 
    Adm, Mohammad; Garloff, Juergen (In: A Panorama of Mathematics: Pure and Applied, Contemporary Mathematics, vol. 658, Amer. Math. Soc.,, 2016)
    A totally positive matrix is a matrix having all its minors positive. The largest amount by which the single entries of such a matrix can be perturbed without losing the property of total positivity is given. Also some ...
  • A Survey of Classes of Matrices Possessing the Interval Property and Related Properties 
    Adm, Mohammad; Garloff, Juergen; Titi, Jihad (Reliable Computing, 2016)
    This paper considers intervals of real matrices with respect to partial orders and the problem to infer from some exposed matrices lying on the boundary of such an interval that all real matrices taken from the interval ...
  • Total Nonnegativity of Matrices Related to Polynomial Roots and Poles of Rational Functions 
    Adm, Mohammad; Garloff, Juergen; Titi, Jihad (Journal of Mathematical Analysis and Applications, 2016)
    In this paper totally nonnegative (positive) matrices are considered which are matrices having all their minors nonnegative (positive); the almost totally positive matrices form a class between the totally nonnegative ...
  • Improved Tests and Characterizations of Totally Nonnegative Matrices 
    Adm, Mohammad; Garloff, Juergen (Electronic Journal of Linear Algebra, 2014)
    Totally nonnegative matrices, i.e., matrices having all minors nonnegative, are considered. A condensed form of the Cauchon algorithm which has been proposed for finding a parameterization of the set of these matrices with ...
  • Intervals of Totally Nonnegative Matrices 
    Adm, Mohammad; Garloff, Juergen (Linear Algebra and its Applications, 2013)
    Totally nonnegative matrices, i.e., matrices having all their minors nonnegative, and matrix intervals with respect to the checkerboard ordering are considered. It is proven that if the two bound matrices of such a matrix ...
  • Invariance of Total Nonnegativity of a Tridiagonal Matrix under Element-wise Perturbation 
    Adm, Mohammad; Garloff, Juergen (Operators and Matrices, 2014-03-01)
    Tridiagonal matrices are considered which are totally nonnegative, i. e., all their minors are nonnegative. The largest amount is given by which the single entries of such a matrix can be perturbed without losing the ...
  • 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 ...
  • Operation Sense 
    Karama, Muneer Jebreel (2003)
    The aim of this article is to develop the issue of operation sense of fractions through the conditions in real-world for the students in 7th grade, so this advancing students’ mathematical thinking in every day mathematics ...
  • A Practical One Way Hash Algorithm based on Matrix Multiplication 
    Abutaha, Mohammed; Farajallah, Mousa; Tahboub, Radwan (International Journal of Computer Applications, 2011-06-01)
    It is well known that Hash algorithm works in one way, and it cannot be reversed. We can build a new algorithm by using Hill cipher technique .Since its invention in 1929, Hill cipher algorithm which is one of the most ...
  • "Selective Hybrid Chaotic-Based Cipher for Real-Time Image Application 
    Farajallah, Mousa; Qumsieh, Rawan; Isayed, Samer (The Tenth International Conference on Emerging Security Information, Systems and Technologies--SECURWARE 2016, 2016-07-24)
    Confusion and diffusion are the two main principles in encryption. Confusion is a process that drastically changes data from the input to the output. In order to make it right, we have to make the relation between the ...
  • Self generating multi keys cryptosystem model for noninvertible matrices based on hill cipher Algorithm 
    Farajallah, Mousa; Hamamreh, Rushdi (Proceedings of the 2009 International Conference on Security Management, SAM 2009, 2009-07-13)
    Many cryptosystems were designed to prevent data from unauthorized access, and some are relatively secure but slow. Others are fast but relatively not secure enough. One of the most efficient cryptosystems is Hill ...
  • 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 ...
  • 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 ...
  • 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 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 ...
  • دور الاعلام في تحسين نوعية التعليم والتعلم من خلال انشطة ابتكارية 
    Karama, Muneer Jebreel (2013)
    هدفت الدراسة إلى إبراز دور الإعلام في تحسين نوعية التعليم والتعلّم من خلال أنشطة ابتكارية مقترحة، وقد تمثلت مشكلة الدراسة في الإجابة عن الأسئلة :ما الأنشطة الإعلامية المقترحة والتي تحسن من نوعية التعليم والتعلم؟ وما المتطلبات ...
  • Survey paper: cryptography is the science of information security 
    AbuTaha, Mohammed; Farajallah, Mousa; Tahboub, Radwan; Odeh, Mohammad (International Journal of Computer Science and Security (IJCSS), 2011-06-02)
    Cryptography in the past was used in keeping military information, diplomatic correspondence secure and in protecting the national security. However, the use was limited. Nowadays, the range of cryptography applications ...
  • 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 ...
  • Chaos-based crypto and joint crypto-compression systems for images and videos 
    Farajallah, Mousa (UNIVERSITE DE NANTES, 2015-06-30)
    The security of image and video data is important for many applications which require in real-time a high security level. In the first part of this work, four chaos-based cryptosystems, flexible, efficient, and more robust ...

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