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Re: [tor-talk] Evercookies / supercookies tracking & No Script whitelisting tracking sites

The short answer is "Yes, we've looked into it. New Identity removes

The long answer is
https://www.torproject.org/projects/torbrowser/design/#new-identity and

The footnote is "Please help us test this shit in new releases. We just
had a race condition on the cache that allowed cache cookies to persist
for up to a minute after clicking New Identity (though they did go away
after that)."

Thus spake Joe Btfsplk (joebtfsplk@xxxxxxx):

> The most recent versions of TBB & No Script's default settings under
> Advanced>External filters, is not to block hulu.com, .youtube.com.
> The content type (I think) refers to shockwave|futuresplash.  How -
> OR IF - No Script's blocking ability of "evercookies" w/ its
> settings as it ships w/ TBB & sites like * Hulu * that (at least in
> recent past) were * confirmed * by several privacy investigation
> projects to be using evercookie / Kissmetrics.com tracking cookie
> technology.  These cookies are NOT blocked by disabling all cookies
> / all 3rd party cookies in Firefox.  Even if they were, TBB ships w/
> allow all cookies enabled.
> One of the many ways / places (up to 12 - 15) that the js loaded
> evercookies can be placed is as an LSO / flash cookie.  There are
> many other traditional & non traditional places these cookies are
> stored.  AFAICT from reading research, these cookies CAN transmit
> data that could compromise Tor users' anonymity - as they certainly
> can in Firefox.  They are also very difficult to del & "stay"
> deleted (thus, sometimes called Zombie cookies).  Deleting cookies
> by "normal" means does NOT delete them.
> Numerous research reports that I've read say one of the only ways to
> block these is disable js for most sites (as in, using No Script),
> but that supposedly makes users more susceptible to fingerprinting,
> by only allowing certain sites to load js content.  Yet Hulu was one
> of the worst offenders for using evercookies (I don't use Hulu,
> BTW), but is whitelisted in NoScript.
> Have Tor devs looked into THESE special types of cookies & if they
> potentially compromising anonymity or even increasing chances of
> fingerprinting, due to information they transmit about every site
> you visit?
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Mike Perry

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