Mémoires de Fin d’Etudes
Etablissement
Université de Laghouat - Amar Telidji
Affiliation
Département d’Informatique
Auteur
Bensaad, Mohamed Lahcen
Directeur de thèse
M.B. YAGOUBI (Professeur)
Filière
Informatique
Diplôme
Doctorat
Titre
Steganography and Digital Watermarking
Mots clés
Information Hiding, Steganography, Digital Watermarking, Information Security, Arabic Text, VoIP.
Résumé
Ever since humans started writing and sending messages, they have been in need of secrecy and privacy to hide their secret information or share it with specific persons without letting others know about it. Whether this information is military and strategic plans, sensitive blueprints or personal secrets, it is very important to secure the communication of this information using different kind of techniques. Steganography is one of these techniques that can be used to secure communications by hiding messages in other objects. It has become one of the hottest research areas in this information age due to its importance in solving many challenging problems not only for covert communications, but also for copyright protection, banking, education, and many other domains. There are many advanced techniques developed mainly for multimedia but the same has not been done for text and other formats of digital content, and we can say that there is a lack of sufficient research on information hiding in text especially for Arabic text which started to appear only in 2006. In this thesis, we present some new techniques of information hiding in two different mediums, the first is Arabic text, and the second is VoIP (Voice over Internet Protocol). For Arabic text, we propose three different techniques. Tests and comparisons with other known works show that all the three proposed techniques are better than what is published till now, especially in matter of capacity. For VoIP, we present a new method that hides data in a specific open source speech codec owned by Google. Tests and results show that our method does not harm the quality of the speech. This makes it a good candidate to be used for different purposes
Date de soutenance
05/03/2014
Cote
thl5.56
Pagination
93pg
Illusatration
ill.graf.encoul;fig;
Format
29cm
Notes
References
Statut
Soutenue