On Febuary 8th, 2015 the availability of a Tor hidden service that can be used to view and post on 8chan was announced. Hidden services allow users of the Tor network to build end-to-end encrypted connections to a server that are theoretically anonymous and unable to be eavesdropped on. 8chan is the largest imageboard known to offer this feature. The onion link for 8chan is
http://fullchan4jtta4sx.onion. For a more information about Tor hidden services, you can read the Tor Project's description of the protocol:
https://www.torproject.org/docs/hidden-services.html.enUsers accessing 8chan via the hidden service are currently subject to a few restrictions in order to prevent abuse. As of writing they are: Tor users must fill out a captcha that allows them to make 5 posts before requiring they fill out a new captcha, Tor users cannot report posts and Tor users cannot upload images. Hotwheel's decision to use Google's reCaptcha as the captcha service has raised privacy concerns but some claim that using the Javascript-less version of reCaptcha does not put a user's anonymity at risk. It is assumed by most that reCaptcha is temporary and will be replaced with one similar to overchan's “grey soup” captcha eventually.
On boards with poster IDs Tor users all share the same 000000 ID. Some users, unaware of the Tor-related news, have begun mistakenly believing 000000 is the exclusive ID of Hotwheels or of Global Volunteers. One such incident is pictured in the far right where a Tor user on /v/ received a post number ending in triple zeroes to go with their ID.
Board Owners are able to choose whether they want to allow Tor posting or not. Of the top 25 boards, currently only /gamergate/ and /cow/ have the featured disabled.
Updates to the story of 8chan's hidden service will posted in this thread as they occur.