Google +1 tracks mouse movements?
stackoverflow.com
Google +1 tracks mouse movements?
1–10 of 29 posts
Re: Google +1 tracks mouse movements?
#2Does the emperor wear any clothes?
Re: Google +1 tracks mouse movements?
#3According to the link, this is being used as a source of entropy to generate random numbers. Fascinating.
Re: Google +1 tracks mouse movements?
#4According to the link, this is being used as a source of entropy to generate random numbers. Fascinating.
Hah!
That's so simple, yet so brilliant.
Re: Google +1 tracks mouse movements?
#5cute, but surely there are less intensive ways of generating random numbers?
Re: Google +1 tracks mouse movements?
#6cute, but surely there are less intensive ways of generating random numbers?
I've always been a fan of using electronic noise. It's not complicated to build a device which does this. Weekend project to "hello world" scale if you're not too picky about specifics.
Easiest way is probably with a webcam, which will also give you a pretty good bitrate. The general schema is to read out the bias noise. You do this by blocking out any incoming light to get dark noise + bias noise. Dark noise is an assumed static shift due to CCD characteristics, so read N frames of this and look for the median signal. Subtract that off and you've got the bias, or at least something that's close enough for a weekend project.
Better version, start reading up on the math of noise sources in whatever device you want to use for a sensor. Also do an analysis of N samples to see how close the result comes to the expectation value given the type of noise involved and what deviation is expected at N samples.
Re: Google +1 tracks mouse movements?
#7According to the link, this is being used as a source of entropy to generate random numbers. Fascinating.
Seems pretty reasonable to expect it to be this code from the apache shindig library:
http://svn.apache.org/repos/asf/shindig/trunk/features/src/m...
From the file: This code implements a safer random() method that is seeded from screen width/height and (presumably random/unguessable) mouse movement, in an effort to create a better seed for random().
Its aim is to solve the problem of gadgets that are relying on secret RPC tokens to validate identity.
Re: Google +1 tracks mouse movements?
#8cute, but surely there are less intensive ways of generating random numbers?
I've always been a fan of using electronic noise. It's not complicated to build a device which does this. Weekend project to "hello world" scale if you're not too picky about specifics. Easiest way is probably with a webcam, which will also give you a pretty good bitrate. The general schema is to read out the bias noise. You do this by blocking out any incoming light to get dark noise + bias noise. Dark noise is an a…
There's no way to deploy this over the web, unless you use Flash to acquire their webcam video or audio.
Re: Google +1 tracks mouse movements?
#9Re: Google +1 tracks mouse movements?
#10Earlier quoted context omitted.
I've always been a fan of using electronic noise. It's not complicated to build a device which does this. Weekend project to "hello world" scale if you're not too picky about specifics. Easiest way is probably with a webcam, which will also give you a pretty good bitrate. The general schema is to read out the bias noise. You do this by blocking out any incoming light to get dark noise + bias noise. Dark noise is an a…
There's no way to deploy this over the web, unless you use Flash to acquire their webcam video or audio.
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