Capacitive touch communication: A technique to input data through Devices' Touch Screen

Tam Vu, Akash Baid, Simon Gao, Marco Gruteser, Richard Howard, Janne Lindqvist, Predrag Spasojevic, Jeffrey Walling

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

As we are surrounded by an ever-larger variety of post-PC devices, the traditional methods for identifying and authenticating users have become cumbersome and time consuming. In this paper, we present a capacitive communication method through which a device can recognize who is interacting with it. This method exploits the capacitive touchscreens, which are now used in laptops, phones, and tablets, as a signal receiver. The signal that identifies the user can be generated by a small transmitter embedded into a ring, watch, or other artifact carried on the human body. We explore two example system designs with a low-power continuous transmitter that communicates through the skin and a signet ring that needs to be touched to the screen. Experiments with our prototype transmitter and tablet receiver show that capacitive communication through a touchscreen is possible, even without hardware or firmware modifications on a receiver. This latter approach imposes severe limits on the data rate, but the rate is sufficient for differentiating users in multiplayer tablet games or parental control applications. Controlled experiments with a signal generator also indicate that future designs may be able to achieve data rates that are useful for providing less obtrusive authentication with similar assurance as PIN codes or swipe patterns commonly used on smartphones today.

Original languageEnglish
Article number6585245
Pages (from-to)4-19
Number of pages16
JournalIEEE Transactions on Mobile Computing
Volume13
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • Authentication
  • Capacitive screen
  • Capacitive touch communication
  • Identification
  • Mobile communications
  • Touchscreen

Fingerprint Dive into the research topics of 'Capacitive touch communication: A technique to input data through Devices' Touch Screen'. Together they form a unique fingerprint.

Cite this