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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A symbolic-based passive testing approach to detect vulnerabilities in networking systems / [Une approche symbolique basée sur des tests passifs pour détecter les vulnérabilités des systèmes réseaux]

Mouttappa, Pramila 16 December 2013 (has links)
En raison de la complexité croissante des systèmes réactifs, le test est devenu un des éléments essentiels dans le processus de leur développement. Les tests de conformité avec des méthodes formelles concernent la correction du contrôle fonctionnel, par le biais des tests d'un système en boîte noire avec une spécification formelle du système. Les techniques passives de test sont utilisées lorsque l’exécution des systèmes testés ne peut pas être perturbée ou l'interface du système n'est pas fournie. Les techniques passives de test sont fondées sur l'observation et la vérification des propriétés du comportement d'un système sans interférer avec son fonctionnement normal. Les tests contribuent également à établir les comportements anormaux pendant l’exécution sur la base de l'observation de toute déviation d'un comportement prédéterminé. L'objectif principal de cette thèse est de présenter une nouvelle approche pour la mise en place des tests passifs fondés sur l'analyse des parties contrôle et données du système sous test. Au cours des dernières décennies, de nombreuses théories et outils ont été développés pour effectuer les tests de conformité. De fait, les spécifications ou les propriétés des systèmes réactifs sont souvent modélisés par différentes variantes de Labeled Transition Systems (LTS). Toutefois, ces méthodes ne prennent pas explicitement en compte les parties données du système, étant donné que le modèle sous-jacent de LTS n’est pas en mesure de le faire. Par conséquent, avec ces approches il est nécessaire d'énumérer les valeurs des données avant la modélisation du système. Cela conduit souvent au problème de l'explosion combinatoire de l'état-espace. Pour palier à cette limitation, nous avons étudié un modèle appelé Input-Output Symbolic Transition Systems (IOSTS) qui inclut explicitement toutes les données d'un système réactif. De nombreuses techniques de tests passives prennent uniquement en considération la partie du contrôle du système en négligeant les données, ou elles sont confrontées à une quantité énorme de données du processus. Dans notre approche, nous prenons en compte la partie contrôle et données en intégrant les concepts d'exécution symbolique et nous améliorons l'analyse de traces en introduisant des techniques de slicing des traces d’exécution. Les propriétés sont décrites à l'aide d'IOSTS et nous illustrons dans notre approche comment elles peuvent être testées sur l'exécution réelle des traces en optimisant l'analyse. Ces propriétés peuvent être conçues pour tester la conformité fonctionnelle d'un protocole ainsi que des propriétés de sécurité. Au-delà de l'approche théorique, nous avons développé un outil logiciel qui implémente les algorithmes présentés dans nos travaux. Enfin, comme preuve de concept de notre approche et de l'outil logiciel, nous avons appliqué les techniques à deux études de cas réels : le protocole SIP et le protocole Bluetooth / Due to the increasing complexity of reactive systems, testing has become an important part in the process of the development of such systems. Conformance testing with formal methods refers to checking functional correctness, by means of testing, of a black-box system under test with respect to a formal system specification, i.e., a specification given in a language with a formal semantics. In this aspect, passive testing techniques are used when the implementation under test cannot be disturbed or the system interface is not provided. Passive testing techniques are based on the observation and verification of properties on the behavior of a system without interfering with its normal operation, it also helps to observe abnormal behavior in the implementation under test on the basis of observing any deviation from the predefined behavior. The main objective of this thesis is to present a new approach to perform passive testing based on the analysis of the control and data part of the system under test. During the last decades, many theories and tools have been developed to perform conformance testing. However, in these theories, the specifications or properties of reactive systems are often modeled by different variants of Labeled Transition Systems (LTS). However, these methodologies do not explicitly take into account the system's data, since the underlying model of LTS are not able to do that. Hence, it is mandatory to enumerate the values of the data before modeling the system. This often results in the state-space explosion problem. To overcome this limitation, we have studied a model called Input-Output Symbolic Transition Systems (IOSTS) which explicitly includes all the data of a reactive system. Many passive testing techniques consider only the control part of the system and neglect data, or are confronted with an overwhelming amount of data values to process. In our approach, we consider control and data parts by integrating the concepts of symbolic execution and we improve trace analysis by introducing trace slicing techniques. Properties are described using Input Output Symbolic Transition Systems (IOSTSs) and we illustrate in our approach how they can be tested on real execution traces optimizing the trace analysis. These properties can be designed to test the functional conformance of a protocol as well as security properties. In addition to the theoretical approach, we have developed a software tool that implements the algorithms presented in this paper. Finally, as a proof of concept of our approach and tool we have applied the techniques to two real-life case studies: the SIP and Bluetooth protocol
2

A symbolic-based passive testing approach to detect vulnerabilities in networking systems

Mouttappa, Pramila 16 December 2013 (has links) (PDF)
Due to the increasing complexity of reactive systems, testing has become an important part in the process of the development of such systems. Conformance testing with formal methods refers to checking functional correctness, by means of testing, of a black-box system under test with respect to a formal system specification, i.e., a specification given in a language with a formal semantics. In this aspect, passive testing techniques are used when the implementation under test cannot be disturbed or the system interface is not provided. Passive testing techniques are based on the observation and verification of properties on the behavior of a system without interfering with its normal operation, it also helps to observe abnormal behavior in the implementation under test on the basis of observing any deviation from the predefined behavior. The main objective of this thesis is to present a new approach to perform passive testing based on the analysis of the control and data part of the system under test. During the last decades, many theories and tools have been developed to perform conformance testing. However, in these theories, the specifications or properties of reactive systems are often modeled by different variants of Labeled Transition Systems (LTS). However, these methodologies do not explicitly take into account the system's data, since the underlying model of LTS are not able to do that. Hence, it is mandatory to enumerate the values of the data before modeling the system. This often results in the state-space explosion problem. To overcome this limitation, we have studied a model called Input-Output Symbolic Transition Systems (IOSTS) which explicitly includes all the data of a reactive system. Many passive testing techniques consider only the control part of the system and neglect data, or are confronted with an overwhelming amount of data values to process. In our approach, we consider control and data parts by integrating the concepts of symbolic execution and we improve trace analysis by introducing trace slicing techniques. Properties are described using Input Output Symbolic Transition Systems (IOSTSs) and we illustrate in our approach how they can be tested on real execution traces optimizing the trace analysis. These properties can be designed to test the functional conformance of a protocol as well as security properties. In addition to the theoretical approach, we have developed a software tool that implements the algorithms presented in this paper. Finally, as a proof of concept of our approach and tool we have applied the techniques to two real-life case studies: the SIP and Bluetooth protocol

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