PrivateZone: Providing a Private Execution Environment using ARM TrustZone

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ARM TrustZone is widely used to provide a Trusted Execution Environment (TEE) for mobile devices. However, the use of TrustZone is limited because TrustZone resources are only available for some pre-authorized applications. In other words, only alliances of the TrustZone OS vendors and device manufacturers can use TrustZone to secure their services. To help overcome this problem, we designed the PrivateZone framework to enable individual developers to utilize TrustZone resources. Using PrivateZone, developers can run Security Critical Logics (SCL) in a Private Execution Environment (PrEE). The advantage of PrivateZone is its leveraging of TrustZone resources without undermining the security of existing services in the TEE. To guarantee this, PrivateZone creates a PrEE using a memory region that is isolated from both the Rich Execution Environment (REE) and TEE. In this paper, we describe the design and implementation of PrivateZone. The prototype of PrivateZone was implemented on an Arndale board with a Cortex-A15 dual-core processor. We built PrivateZone by exploring both security and virtualization extensions of the ARM architecture. To illustrate the usage and the efficacy of PrivateZone, we developed an Android application based on PrivateZone framework, and evaluated the performance overhead imposed on the OS in the REE and SCLs in the PrEE.
Publisher
IEEE COMPUTER SOC
Issue Date
2018-09
Language
English
Article Type
Article
Keywords

OPERATING-SYSTEMS; ARCHITECTURE; ATTACKS; KERNEL; SECURE

Citation

IEEE TRANSACTIONS ON DEPENDABLE AND SECURE COMPUTING, v.15, no.5, pp.797 - 810

ISSN
1545-5971
DOI
10.1109/TDSC.2016.2622261
URI
http://hdl.handle.net/10203/245913
Appears in Collection
CS-Journal Papers(저널논문)
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