Telex is a research anti-censorship system that would allow users to circumvent a censor without alerting the censor to the act of circumvention. It is not ready for real users, but a proof-of-concept mock system exists.[1][2][3][4] As of 2018, Telex has evolved into refraction networking.[5]


Telex complements services like Tor (anonymity network) by placing Telex stations in the network infrastructure of free countries. A client can create a TLS tunnel that is indistinguishable from allowed traffic. That way, firewalls in censored countries are neither able to detect nor to block access to specific parts of the Internet, assuming they allow access at all.[6][7][8][9]

See also


  1. ^ J. Alex Halderman (18 July 2011). "Anticensorship in the Internet's Infrastructure". Retrieved 30 January 2014.
  2. ^ "A New Way Around Internet Censorship?". Retrieved 2017-01-04.
  3. ^ "Telex to help defeat web censors". BBC News. 2011-07-19. Retrieved 2017-01-04.
  4. ^ "Thwarting internet censorship: Telex". Retrieved 2017-01-04.
  5. ^ "Telex: Anticensorship in the Network Infrastructure". Retrieved 2020-12-06.
  6. ^ Wustrow, Eric; Wolchok, Scott; Goldberg, Ian; Halderman, J. Alex (2011). "Telex: Anticensorship in the Network Infrastructure" (PDF). Proceedings of the 20th USENIX Conference on Security. Berkeley, CA, USA: USENIX Association: 30.
  7. ^ "Telex Anti-Censorship System - Schneier on Security". Retrieved 2017-01-04.
  8. ^ Nguyen, Tuan. "New software may end internet censorship once and for all | ZDNet". ZDNet. Retrieved 2017-01-04.
  9. ^ "Deep packet inspection used to stop censorship in new "Telex" scheme". Ars Technica. Retrieved 2017-01-04.