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Master's Dissertation
DOI
https://doi.org/10.11606/D.3.2012.tde-19072013-115909
Document
Author
Full name
Gerson de Souza Faria
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Hae, Yong Kim (President)
Arjona Ramírez, Miguel
Pinto, Reynaldo Daniel
Title in Portuguese
Identificação das teclas digitadas a partir da vibração mecânica.
Keywords in Portuguese
Acelerômetros
Arduino
Ataque a canais secundários
ATM
PIN-pad
Processamento de sinais
Segurança da informação
Teclados
Tempest
Abstract in Portuguese
Este trabalho descreve um ataque que detecta as teclas pressionadas em teclados mecânicos pela análise das vibrações geradas quando as mesmas são pressionadas. Dois equipamentos foram experimentados no ataque: um teclado genérico de automação comercial e um terminal de ponto de venda (POS / PIN-pad). Acelerômetros são utilizados como sensores de vibração. Propositalmente, o equipamento necessário para a execução do ataque é de baixíssimo custo, de modo a ressaltar o risco das vulnerabilidades encontradas. Obtivemos taxas de sucesso médio de 69% no reconhecimento das teclas pressionadas para o terminal PIN-pad em repouso e 75% para o mesmo sendo segurado na mão. No caso de teclado de automação comercial, as taxas médias de acerto ficaram em torno de 99%.
Title in English
Identification of pressed keys from mechanical vibrations.
Keywords in English
Accelerometers
Arduino
ATM
Information security
Keyboards
PIN-pad
Side channel attack
Signal processing
Tempest
Abstract in English
This work describes an attack that identifies the sequence of keystrokes analyzing mechanical vibrations generated by the act of pressing keys. We use accelerometers as vibration sensors. The apparatus necessary for this attack is inexpensive and can be unobtrusively embedded within the target equipment. We tested the proposed attack on an ATM keypad and a PIN-pad. We achieved the key recognition rates of 99% in ATM keypad, 69% in PIN-pad resting on a hard surface and 75% in PIN-pad hold in hand.
 
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This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2013-07-23
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • G. S. Faria, and Kim. H. Y. Identification of Pressed Keys From Mechanical Vibrations [doi:10.1109/tifs.2013.2266775]. IEEE Transactions on Information Forensics and Security [online], 2013, vol. 8, p. 1221-1229.
  • G. S. Faria, e Kim, Hae Yong. Identificação das teclas digitadas a partir da vibração mecânica. In Simpósio Brasileiro de Telecomunicações, Brasília, 2012. Anais., 2012.
All rights of the thesis/dissertation are from the authors
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