NDLI: ARMORED: CPU-Bound Encryption for Android-Driven ARM Devices

Content Provider	IEEE Xplore Digital Library
Author	Gotzfried, J. Muller, T.
Copyright Year	2013
Description	Author affiliation: Friedrich-Alexander-Univ., Erlangen-Nurnberg, Germany (Gotzfried, J.; Muller, T.)
Abstract	As recently shown by attacks against Android-driven smart phones, ARM devices are vulnerable to cold boot attacks. At the end of 2012, the data recovery tool FROST was released which exploits the remanence effect of RAM to recover user data from a smart phone, at worst its disk encryption key. Disk encryption is supported in Android since version 4.0 and is today available on many smart phones. With ARMORED, we demonstrate that Android's disk encryption feature can be improved to withstand cold boot attacks by performing AES entirely without RAM. ARMORED stores necessary keys and intermediate values of AES inside registers of the ARM microprocessor architecture without involving main memory. As a consequence, cold boot attacks on encryption keys in RAM appear to be futile. We developed our implementation on a Panda Board and tested it successfully on real phones. We also present a security and a performance analysis for ARMORED.
Starting Page	161
Ending Page	168
File Size	169323
Page Count	8
File Format	PDF
ISBN	9780769550084
DOI	10.1109/ARES.2013.23
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-02
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	CPU-bound encryption Linux Random access memory Encryption Registers Cold boot ARM Kernel Smart phones Android AES
Content Type	Text
Resource Type	Article

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