dc.contributor.author |
Belhadjoudja, Mohamed Camil |
|
dc.contributor.other |
Tadjine, Mohamed, Directeur de thèse |
|
dc.contributor.other |
Chakir, Messaoud, Directeur de thèse |
|
dc.date.accessioned |
2022-04-05T13:06:29Z |
|
dc.date.available |
2022-04-05T13:06:29Z |
|
dc.date.issued |
2021 |
|
dc.identifier.uri |
http://repository.enp.edu.dz/jspui/handle/123456789/10491 |
|
dc.description |
Mémoire de Projet de Fin d’Études : Automatique : Alger, École Nationale Polytechnique : 2021 |
fr_FR |
dc.description.abstract |
The subject of this thesis is the synchronization of chaotic systems using non-linear bservers, with applications to cryptography. I present in my thesis a general method to improve the performance of some observers with unknown inputs. I also develop a method to improve the frequency characteristics of chaotic systems such as the Rossler
system and the Lorenz system. I also build modifications of a twisting observer for systems with time delay. Among these modifications, there is a method that allows us to consider any unknown input of a system in triangular form as being a fictitious state, which allows us to use state observers for the estimation of an unknown input. I construct also the notion of higher-adaptive-order sliding mode observers. I also present a countermeasure using ANFIS observers and an improved Lorenz system facing an acoustic cryptanalysis attack against RSA, then I combine the chaos theory with the lattice theory to generate new problems in post-quantum cryptography |
fr_FR |
dc.language.iso |
en |
fr_FR |
dc.subject |
Chaos theory |
fr_FR |
dc.subject |
Cryptography |
fr_FR |
dc.subject |
Nonlinear observers |
fr_FR |
dc.subject |
Chaos synchronization |
fr_FR |
dc.subject |
Lattices |
fr_FR |
dc.title |
Chaos synchronization using non-linear observers with applications to cryptography |
fr_FR |
dc.type |
Thesis |
fr_FR |