ooni, 2 months ago Overall, our analysis of OONI data from #Tanzania show that most ISPs appear to implement blocks by means of TLS interference, specifically by timing out the session after the ClientHello message during the TLS handshake. As the timing of the blocks and the types of URLs blocked are (mostly) consistent across (tested) networks, ISPs in Tanzania likely implement blocks in a coordinated manner (possibly through the use of Deep Packet Inspection technology). https://ooni.org/post/2024-tanzania-lgbtiq-censorship-and-other-targeted-blocks/
Overall, our analysis of OONI data from #Tanzania show that most ISPs appear to implement blocks by means of TLS interference, specifically by timing out the session after the ClientHello message during the TLS handshake.
As the timing of the blocks and the types of URLs blocked are (mostly) consistent across (tested) networks, ISPs in Tanzania likely implement blocks in a coordinated manner (possibly through the use of Deep Packet Inspection technology). https://ooni.org/post/2024-tanzania-lgbtiq-censorship-and-other-targeted-blocks/
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