Author

Abdelmalek Azizi

Mohamed First University, Morocco

4 articles in our journals

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Research ArticleOpen accessCrypto-Watermarking of Images based on the Permutation on Z/pZ and the Wavelet Decompositions of Legall 5/3Younes Benlcouiri, Moulay Chrif Ismaili, Abdelmalek Azizi, Mohammed BenabdellahIn this work, we are interested in the insertion of the watermarking of digital images in the frequency domain. The algorithm proposed uses the transformed into wavelet Legall 5/3 on an image encrypted by swapping on the Z/pZ field, to perform the watermarking. By consequence, this introduces the concept of keys to the traditional methods of non-blind watermarking. The results … …Journal of Computer Science, Vol. 15, Issue 6 · 26 Jun 2019 · 7,457 accessesView PDF Cite

Research ArticleOpen accessA Modified Secure Scheme of Quantum Key Distribution Without Public Announcement BasesEs-Said Chanigui, Abdelmalek AziziThis study provides a simple variation of the protocol of quantum key expansion proposed by Hwang. Some weaknesses relating to the step of public discussions for error detection are analyzed and an attack strategy, allowing the eavesdropper to get partial information about the used bases, is put forward. Using the One-Time Pad cipher, we propose a possible scheme which is … …Journal of Computer Science, Vol. 11, Issue 1 · 22 Jan 2015 · 7,117 accessesView PDF Cite

Research ArticleOpen accessA VARIANT OF POLLARD'S RHO ATTACK ON ELLIPTIC CURVE CRYPTOSYSTEMSSiham Ezzouak, Mohammed Elamrani, Abdelmalek AziziElliptic Curve cryptosystems appear to be more secure and efficient when requiring small key size to implement than other public key cryptosystems. Its security is based upon the difficulty of solving Elliptic Curve Discrete Logarithm Problem (ECDLP). This study proposes a variant of generic algorithm Pollard's Rho for finding ECDLP using cycle detection with stack and a mixture of cycle … …Journal of Computer Science, Vol. 10, Issue 8 · 9 Apr 2014 · 7,272 accessesView PDF Cite

Research ArticleOpen accessClassification of Attacks on Embedded SystemsNoura Ouerdi, M’hammed Ziane, Abdelmalek Azizi, Mostafa AziziThe current growth of the number of Embedded Systems (ES) and their use in sensitive systems attract the attention of attackers. They are exposed to real threats and incur significant risks especially when they are involved in specific military or industrial systems. It is important to study the subject from different angles to understand, predict and learn how to protect … …Journal of Computer Science, Vol. 8, Issue 11 · 19 Sep 2012 · 6,696 accessesView PDF Cite