Technology of Information Security
|
App. Res. of Comp. Printed Article
Vol. 37, 2020 No. 6
1812-1815,1820

External attack method for smartphone based on DTMF signal and defense method

Shen Xingfa
Yang Jian
Ran Degang
School of Computer Science & Technology, Hangzhou Dianzi University, Hangzhou 310018, China
DOI: 10.19734/j.issn.1001-3695.2018.11.0893

Abstract

This paper proposed an external attack method for smartphone based on DTMF signal, which could attack effectively without the user being aware and without interaction with the smartphone. Firstly, it recorded some important keystroke ope-ration of user. Secondly, it performed double-threshold endpoint detection in time domain to extract the effective area of the signal. Thirdly, it converted the effective area to frequency domain by Goertzel algorithm for digital classification. Finally, all the keystroke data of the user were obtained by comparing the DTMF coding table. The experimental results show that the method can decipher more than 80% of the keystroke data under the condition of 10 dB signal-to-noise ratio and no interaction with the smartphone. In order to that, it proposed a defense method.

Foundation Support

国家自然科学基金资助项目(61672198)
杭州电子科技大学学科交叉创新团队建设项目

Publish Information

DOI: 10.19734/j.issn.1001-3695.2018.11.0893
Publish at: Application Research of Computers Printed Article, Vol. 37, 2020 No. 6
Section: Technology of Information Security
Pages: 1812-1815,1820
Serial Number: 1001-3695(2020)06-042-1812-04

Publish History

[2020-06-05] Printed Article

Cite This Article

申兴发, 杨健, 冉德纲. 基于DTMF信号的智能手机外部攻击及防御方法 [J]. 计算机应用研究, 2020, 37 (6): 1812-1815,1820. (Shen Xingfa, Yang Jian, Ran Degang. External attack method for smartphone based on DTMF signal and defense method [J]. Application Research of Computers, 2020, 37 (6): 1812-1815,1820. )

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  • Application Research of Computers Monthly Journal
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Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

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