

Pinpoint resource android#
Modern mobile operating systems such as Android and Apple iOS allow apps to access various system resources, with or without explicit user permission. Leveraging data-mining techniques, we explore a set of popular applications, establishing that there is a clear privacy danger for numerous users installing innocent-looking and but, possibly, "curious" applications. By accessing and stealthily extracting data thought to be unworthy of protection, we manage to access highly sensitive information: user identifiers and habits. What has been overlooked is that such a "curious" application can prey on data stored in the Android's commonly accessible external storage or on unprotected phone sensors. This is what we demonstrate here: an application with the common READ_EXTERNAL_STORAGE and the INTERNET permissions can be the basis of extracting and inferring a wealth of private information. However, examining the access permissions is not enough to assess privacy exposure even seemingly harmless applications can severely expose user data. La dernière contribution de cette thèse consiste en la réalisation d'un prototype de cette architecture sur une carte de développement, associée à la présentation de tests permettant de montrer l'efficacité et la pertinence de l'approche.Īndroid's permission system empowers informed privacy decisions when installing third-party applications.
Pinpoint resource plus#
Plus précisément, ceux-ci ont été implantés à la fois dans le framework Android, dans le noyau Linux, et dans un hyperviseur.

comprenant plusieurs composants de différents niveaux de privilèges. Cette deuxième contribution se repose sur une architecture multiniveau,i.e. Elle est adjointe à la conception d'une architecture de sécurité implémentant les mécanismes de contrôle d'accès nécessaires à sa mise en oeuvre. Cette politique de sécurité constitue la première contribution de cette thèse. Outre les bénéfices en termes de sécurité, l'utilisation d'une telle politique permet à un utilisateur d'avoir un contrôle plus fin sur l'accès des applications aux données qui relèvent de la vie privée. en fonction du contexte courant d'exécution du smartphone, les droits d'exécution et la capacité d'accès aux ressources du smartphone, pour chaque application installée. Celle-ci a pour but de restreindre dynamiquement, i.e. Pour répondre à ces dernières, nous proposons une politique de sécurité venant compléter le système de permissions actuel d'Android. Nous avons en effet relevé un manque dans les capacités d'expression du modèle de permission d'Android vis-à-vis d'un certain nombre de menaces émergentes. Our evaluation results show that practical security and privacy advantages can be gained using our approach, without inducing the problematic side-effects that other general-purpose designs must address.ĭans cette thèse, nous nous intéressons spécifiquement à l'environnement Android. We demonstrate our strategy with a case study on Android System Services, and show four applications of PINPOINTed system services functioning with unmodified market apps. This strategy allows the rest of the Framework to function fully as intended, transparently. PINPOINT embodies the concept of Linux Namespace lightweight isolation, but does so in the Android Framework by guiding the security designer towards isolation points that are contextually close to the resource(s) that need to be isolated. In this paper, we present PINPOINT, a resource isolation strategy that forgoes general-purpose solutions in favor of a " building block " approach that addresses specific end-user security goals. Thus, the general purpose solutions become inefficient and burdensome if the end-user has only specific security goals.

Although previous efforts in developing general-purpose isolation solutions have shown that some of these negative side-effects can be mitigated, doing so involves overcoming significant design challenges by incorporating numerous additional platform complexities not directly related to improved security. In an open architecture such as Android, this price and its impact on performance, usability, and transparency must be carefully considered. However, isolation usually carries a price in terms of less resource sharing and reduced inter-process communication. Virtualization is frequently used to isolate untrusted processes and control their access to sensitive resources.
