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After a specific amount of time, do bridges generated from https://bridges.torproject.org become useless in circumventing Tor censorship? Do these bridges eventually become recognized as Tor bridges? What if these bridges come with a pluggable transport such as Obfs4 or Meek?

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  • china blocks tor bridges by obtaining full list of them. obfs4 prevents active probing but don't prevent someone retrieving bridge descriptor – user32272 Apr 28 at 9:23
  • China doesn't have a list of Tor bridges. Instead, they fingerprint Tor traffic so bridges are usually detected. – Swangie Apr 28 at 13:14
  • "China" crawls several sources of bridges (mail, website) and makes a list out of the results. It uses it to block those bridges. However they also have other means to find out information about bridges, like @Swangie wrote. – Jens Kubieziel May 4 at 10:11

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