@inproceedings{ParraRodriguezSchrecklingPosegga2017, author = {Parra Rodriguez, Juan D. and Schreckling, Daniel and Posegga, Joachim}, title = {Addressing Data-Centric Security Requirements for IoT-Based Systems}, series = {2016 International Workshop on Secure Internet of Things (SIoT)}, booktitle = {2016 International Workshop on Secure Internet of Things (SIoT)}, publisher = {IEEE Xplore}, address = {Heraklion, Greece}, isbn = {978-1-5090-5091-8}, doi = {10.1109/SIoT.2016.007}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-6546}, pages = {[10] Seiten}, year = {2017}, abstract = {Allowing users to control access to their data is paramount for the success of the Internet of Things; therefore, it is imperative to ensure it, even when data has left the users' control, e.g. shared with cloud infrastructure. Consequently, we propose several state of the art mechanisms from the security and privacy research fields to cope with this requirement. To illustrate how each mechanism can be applied, we derive a data-centric architecture providing access control and privacy guaranties for the users of IoT-based applications. Moreover, we discuss the limitations and challenges related to applying the selected mechanisms to ensure access control remotely. Also, we validate our architecture by showing how it empowers users to control access to their health data in a quantified self use case.}, language = {en} } @inproceedings{ParraRodriguezPosegga2018, author = {Parra Rodriguez, Juan D. and Posegga, Joachim}, title = {Local Storage on Steroids: Abusing Web Browsers for Hidden Content Storage and Distribution}, series = {International Conference on Security and Privacy in Communication Systems}, booktitle = {International Conference on Security and Privacy in Communication Systems}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-01704-0}, doi = {10.1007/978-3-030-01704-0_19}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-6572}, pages = {20 Seiten}, year = {2018}, abstract = {Analysing security assumptions taken for the WebRTC and postMessage APIs led us to find a novel attack abusing the browsers' persistent storage capabilities. The presented attack can be executed without the website's visitor knowledge, and it requires neither browser vulnerabilities nor additional software on the browser's side. To exemplify this, we study how can an attacker use browsers to create a network for persistent storage and distribution of arbitrary data. In our proof of concept, the total storage of the network, and therefore the space used within each browser, grows linearly with the number of origins delivering the malicious JavaScript code. Further, data transfers between browsers are not restricted by the Same Origin Policy, which allows for a unified cross-origin browser network, regardless of the origin from which the script executing the functionality is loaded from. In the course of our work, we assess the feasibility of a real-life deployment of the network by running experiments using Linux containers and browser automation tools. Moreover, we show how security mechanisms against third-party tracking, cross-site scripting and click-jacking can diminish the attack's impact, or even prevent it.}, language = {en} } @inproceedings{ParraRodriguezPosegga2017, author = {Parra Rodriguez, Juan D. and Posegga, Joachim}, title = {CSP \& Co. Can Save Us from a Rogue Cross-Origin Storage Browser Network! But for How Long?}, series = {Proceedings of the Eighth ACM Conference on Data and Application Security and Privacy}, booktitle = {Proceedings of the Eighth ACM Conference on Data and Application Security and Privacy}, publisher = {ACM}, address = {New York, NY, USA}, isbn = {978-1-4503-5632-9}, doi = {10.1145/3176258.3176951}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:739-opus4-6561}, pages = {3 Seiten}, year = {2017}, abstract = {We introduce a new browser abuse scenario where an attacker uses local storage capabilities without the website's visitor knowledge to create a network of browsers for persistent storage and distribution of arbitrary data. We describe how security-aware users can use mechanisms such as the Content Security Policy (CSP), sandboxing, and third-party tracking protection, i.e., CSP \& Company, to limit the network's effectiveness. From another point of view, we also show that the upcoming Suborigin standard can inadvertently thwart existing countermeasures, if it is adopted.}, language = {en} }