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Re: [sensors] Javascript 120Hz devicemotion events for high end inertial applications

From: Tobie Langel via GitHub <sysbot+gh@w3.org>
Date: Fri, 03 Mar 2017 21:08:07 +0000
To: public-device-apis-log@w3.org
Message-ID: <issue_comment.created-284070424-1488575286-sysbot+gh@w3.org>
> Let's find a possible risk of inferring keystrokes from this paper. 
See the Figure 5 on page - the accuracy stabilizes at some point (but 
that's a model-dependent feature!).

>> _"We observe that as the sampling rate increases to 100Hz, we 
obtain significantly higher individual key accuracies. This find- ing 
informs a potential resolution to the security concerns raised by our 
findings: by enforcing a low sampling rate on the accelerometer for 
untrusted applications or background applications, one can 
substantially mitigate the predictive accuracy of keystroke inference 

> In this particular risk scenario using this particular model, 
limiting frequency could help.

Thanks to the link to the paper. I remember reading this a while back.
 I'm super happy I'm now able to link to it. This is exactly the kind 
of reference I was looking for.

The difference in accuracy between 60 Hz and 200 Hz is minute, which 
is precisely what I wanted to demonstrate. It makes enabling use cases
 such as this one a no-brainer imho.

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Received on Friday, 3 March 2017 21:08:13 UTC

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