%0 Conference Proceedings
%T KeVlar-Tz: A Secure Cache for Arm TrustZone
%+ Centre Suisse d'Electronique et Microtechnique SA (CSEM)
%+ Université de Neuchâtel = University of Neuchatel (UNINE)
%A Benedito, Oscar
%A Delgado-Gonzalo, Ricard
%A Schiavoni, Valerio
%Z Part 4: Trusted Environments
%< avec comité de lecture
%( Lecture Notes in Computer Science
%B 21th IFIP International Conference on Distributed Applications and Interoperable Systems (DAIS)
%C Valletta, Malta
%Y Miguel Matos
%Y Fabíola Greve
%I Springer International Publishing
%3 Distributed Applications and Interoperable Systems
%V LNCS-12718
%P 109-124
%8 2021-06-14
%D 2021
%R 10.1007/978-3-030-78198-9_8
%K Caching
%K Edge devices
%K TrustZone
%K TEE
%K OP-TEE
%Z Computer Science [cs]
%Z Computer Science [cs]/Networking and Internet Architecture [cs.NI]Conference papers
%X Edge devices are increasingly in charge of storing privacy-sensitive data, in particular implantables, wearables, and nearables can potentially collect and process high-resolution vital signs 24/7. Storing and performing computations over such data in a privacy-preserving fashion is of paramount importance. We present KeVlar-Tz, an application-level trusted cache designed to leverage Arm TrustZone, a popular trusted execution environment available in consumer-grade devices. To facilitate the integration with existing systems and IoT devices and protocols, KeVlar-Tz exposes a REST-based interface with connection endpoints inside the TrustZone enclave. Furthermore, it exploits the on-device secure persistent storage to guarantee durability of data across reboots. We fully implemented KeVlar-Tz on top of the Op-Tee framework, and experimentally evaluated its performance. Our results showcase performance trade-offs, for instance in terms of throughput and latency, for various workloads, and we believe our results can be useful for practitioners and in general developers of systems for TrustZone. KeVlar-Tz is available as open-source at https://github.com/mqttz/kevlar-tz/.
%G English
%Z TC 6
%Z WG 6.1
%2 https://inria.hal.science/hal-03384854/document
%2 https://inria.hal.science/hal-03384854/file/509420_1_En_8_Chapter.pdf
%L hal-03384854
%U https://inria.hal.science/hal-03384854
%~ IFIP-LNCS
%~ IFIP
%~ IFIP-TC
%~ IFIP-WG
%~ IFIP-TC6
%~ IFIP-WG6-1
%~ IFIP-DAIS
%~ IFIP-LNCS-12718