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– user32272Commented Apr 28, 2021 at 9:23
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China doesn't have a list of Tor bridges. Instead, they fingerprint Tor traffic so bridges are usually detected.– SwangieCommented Apr 28, 2021 at 13:14
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"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 KubiezielCommented May 4, 2021 at 10:11
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