[tor-bugs] #18361 [Tor Browser]: Issues with corporate censorship and mass surveillance
Tor Bug Tracker & Wiki
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Sun Feb 28 13:55:49 UTC 2016
#18361: Issues with corporate censorship and mass surveillance
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Reporter: ioerror | Owner: tbb-team
Type: enhancement | Status: new
Priority: High | Milestone:
Component: Tor Browser | Version:
Severity: Critical | Resolution:
Keywords: security, privacy, anonymity | Actual Points:
Parent ID: | Points:
Sponsor: |
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Comment (by polyclef):
Cloudflare is using recaptcha. Recaptcha has been broken for years.
http://bitland.net/captcha.pdf describes how to defeat captchas in general
and a prior version of recaptcha in particular.
Many challenges are overly simple and can be broken with existing tools
that require no further modification.
Example:
[[Image(http://bitland.net/recaptcha-001.jpg)]]
can be solved with tesseract
{{{% tesseract recaptcha-001.jpg stdout -psm 4}}}
outputs
{{{1307}}}
Other challenges may require simple processing such as erode/dilate, etc
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18361#comment:173>
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