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Ghizlane Azizi,Mostafa Layachi,Mustapha Akodad,Mourad Baghour,Mohammad Ghalit,Elkhadir Gharibi,Hamza Ngadi,Abdelmajid Moumen 한국해양과학기술원 2020 Ocean science journal Vol.55 No.3
The accumulation levels of elements (Al, As, Li, Mg, Mn, S, Si, Ti, and V) in the soft tissue of mussels (Mytilus galloprovincialis), collected monthly in 2016, from Junuary to December, from sampling sites of the mussel farming facilities installed in the coastal areas of Al Hoceima, were investigated. The studied element levels were determined by using Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES 720-ES). Descending order of the average element concentrations in soft tissue ofM. galloprovincialiswas S > Mg > Si> Al > Mn > Ti > As >V > Li. Element contents (Al, As, Mg, S and V) in tissue of mussels were significantly different (P < 0.05) between seasons, being highest in winter and lowest in summer. Strong correlations were observed between studied elements and chlorophylla, indicating the importance of food for metal bioaccumulation in mussels in this period of the season. The observed strong correlations for metal levels in tissues of mussels can be explained by their common sources, which are associated with anthropogenic effects. The detected seasonal variations of investigated element concentrations in soft tissues ofM. galloprovincialiscould be attributed to physicochemical parameters such as temperature, salinity, dissolved oxygen, nutrients and food availability, as well as the biological status of the mussel. This study may provide basic information for detecting the current pollution status of investigated elements in Al Hoceima coasts from the Moroccan Mediterranean Sea usingM. galloprovincialisas biological indicators.
Reversing Bytecode of Obfuscated Java Based Smart Card Using Side Chanel Analysis
Mohammed Amine Kasmi,Mostafa Azizi,Jean-Louis Lanet 보안공학연구지원센터 2015 International Journal of Security and Its Applicat Vol.9 No.11
Side-channel Analysis (SCA) has become a reliable method for cryptanalysts to break cryptographic algorithms. Recently, SCA is used to reverse engineer the applet bytecodes on Java based smart cards. In addition of Power Analysis, other techniques of SCA exist, such as Electromagnetic Analysis (EMA). EMA of smart cards is a powerful technique that allows extracting information about the executed bytecode as well as about the processed data. In our work, we study the possibility to apply reverse engineering upon a Java Card applet in which the virtual machine is obfuscated by using SCA techniques. Even if this process of bytecode obfuscation is an effective way to prevent execution of an arbitrary and malicious bytecode, we believe that it can be systematically bypassed regardless the level of the platform encryption under the reverse engineering trails. In this paper, we present a methodology that could be used to find out the encryption key of the obfuscation process using the reverse engineering process through SCA. To perform reverse engineering, a white box approach providing access to the Java Card is needed in a learning stage, and then the technique used can be used on a black box approach where the code of applications is not accessible at the matching stage.
Modeling and Code Generation of Android Applications Using Acceleo
Hanane BENOUDA,Redouane ESSBAI,Mostafa AZIZI,Mimoun MOUSSAOUI 보안공학연구지원센터 2016 International Journal of Software Engineering and Vol.10 No.3
The development of mobile applications becomes increasingly popular in our daily life due to the intensive use of applications in mobile devices like smartphones and tablets. The diversity and variety of mobile operating systems (Android, iOS, Black Berry, Windows Phone, etc.) make software engineers in front of a big challenge to develop the same application for these different platforms. This paper presents a methodology based on the Model Driven Architecture (MDA) to develop mobile applications according to the principle “develops once, use everywhere”. Our approach exploits UML modeling and Acceleo to generate specific code in order to accelerate and facilitate the development of mobile applications.