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arXiv · 1604.07543

Taming Energy Cost of Disk Encryption Software on Data-Intensive Mobile Devices

Yang Hu·John C. S. Lui·Wenjun Hu·Xiaobo Ma·Jianfeng Li·Xiao Liang
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Abstract

Disk encryption is frequently used to secure confidential data on mobile devices. However, the high energy cost of disk encryption poses a heavy burden on those devices with limited battery capacity especially when a large amount of data needs to be protected by disk encryption. To address the challenge, we develop a new kernel-level disk encryption software, Populus. Almost 98% of Populus's encryption/decryption computation is not related with the input plaintext/ciphertext, so we accomplish the computation in advance during initialization when a consistent power supply is available. We conduct cryptanalysis on Populus and finally conclude that state-of-the-art cryptanalysis techniques fail to break Populus in reasonable computational complexity. We also conduct energy consumption experiments on Populus and dm-crypt, a famous disk encryption software for Android and Linux mobile devices. The experimental results demonstrate that Populus consumes 50%-70% less energy than dm-crypt.

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Yang Hu, John C. S. Lui, Wenjun Hu, Xiaobo Ma, Jianfeng Li, Xiao Liang. 2016-04-26. Taming Energy Cost of Disk Encryption Software on Data-Intensive Mobile Devices. https://doi.org/10.1016/j.future.2017.09.025

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