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arXiv · 1401.7444

Securing Smartphones: A Micro-TCB Approach

Yossi Gilad·Amir Herzberg·Ari Trachtenberg
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Abstract

As mobile phones have evolved into `smartphones', with complex operating systems running third- party software, they have become increasingly vulnerable to malicious applications (malware). We introduce a new design for mitigating malware attacks against smartphone users, based on a small trusted computing base module, denoted uTCB. The uTCB manages sensitive data and sensors, and provides core services to applications, independently of the operating system. The user invokes uTCB using a simple secure attention key, which is pressed in order to validate physical possession of the device and authorize a sensitive action; this protects private information even if the device is infected with malware. We present a proof-of-concept implementation of uTCB based on ARM's TrustZone, a secure execution environment increasingly found in smartphones, and evaluate our implementation using simulations.

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Yossi Gilad, Amir Herzberg, Ari Trachtenberg. 2014-01-29. Securing Smartphones: A Micro-TCB Approach. https://arxiv.org/abs/1401.7444

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