Telex (anti-censorship system)

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]

## Contents

* 1 Purpose
* 2 See also
* 3 References
* 4 External links

## Purpose

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

* Domain fronting

## References

1. ↑ J. Alex Halderman (18 July 2011). "Anticensorship in the Internet's Infrastructure". https://freedom-to-tinker.com/blog/jhalderm/anticensorship-internets-infrastructure/.
2. ↑ "A New Way Around Internet Censorship?". https://www.npr.org/2011/07/31/138872976/a-new-way-around-internet-censorship.
3. ↑ "Telex to help defeat web censors" (in en-GB). BBC News. 2011-07-19. https://www.bbc.com/news/technology-14199218.
4. ↑ "Thwarting internet censorship: Telex". http://www.engin.umich.edu/college/about/news/stories/2011/august/thwarting-internet-censorship-telex.
5. ↑ "Telex: Anticensorship in the Network Infrastructure". https://telex.cc/.
6. ↑ Wustrow, Eric; Wolchok, Scott; Goldberg, Ian; Halderman, J. Alex (2011). "Telex: Anticensorship in the Network Infrastructure". Proceedings of the 20th USENIX Conference on Security (Berkeley, CA, USA: USENIX Association): 30. https://www.usenix.org/legacy/events/sec11/tech/full_papers/Wustrow.pdf.
7. ↑ "Telex Anti-Censorship System - Schneier on Security". https://www.schneier.com/blog/archives/2011/07/telex_anti-cens.html.
8. ↑ Nguyen, Tuan. "New software may end internet censorship once and for all | ZDNet". http://www.zdnet.com/article/new-software-may-end-internet-censorship-once-and-for-all/.
9. ↑ "Deep packet inspection used to stop censorship in new "Telex" scheme". Ars Technica. https://arstechnica.com/tech-policy/2011/07/researchers-develop-end-to-middle-anti-censorship-tech/.

## External links

* Official website

* v
* t
* e

Internet censorship circumvention technologies

Background|

* Internet censorship
* Internet censorship in China
* National intranet
* Censorship and blocking technologies
* IP address blocking
* DNS cache poisoning
* Wordfilter
* Great Firewall of China
* Blocks on specific websites
* Wikipedia
* Facebook
* Twitter

Principles|

| With a proxy server|

* P2P
* Web proxies
* SSH
* VPN
* PAC

|

Without a proxy server|

* HTTPS
* IPv6 transition mechanism
* hosts
* DNSCrypt
* Domain fronting

Anti-censorship software|

| Free software|

* Lantern
* Psiphon
* Shadowsocks
* Outline VPN
* ~~GoAgent~~

|

Proprietary software|

* Freegate
* Ultrasurf
* Hotspot Shield
* ~~fqrouter~~
* ~~Xiaoyaoyou~~
* ~~Huofenghuang~~
* ~~Garden Networks~~
* ~~Telex~~
* FreeBrowser
* CGIProxy
* Proxify

Browser extensions|

* Hongxing
* ~~uProxy~~

Anonymity|

| Anonymous software|

* Tor
* JAP
* Flash proxy
* Mixmaster

|

Anonymous P2P network|

* I2P
* ZeroNet
* Freenet
* StealthNet

Relevant organizations|

* GreatFire
* FreeWeibo
* Turkey Blocks

Reference|

* Program Think Blog
* Great Cannon

~~Strike through~~ = the custodians have stopped maintenance

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