The UK is one of the most restrictive countries in the world when it comes to the internet...canada and australia are right up there with them...censorship is ALREADY happening in these countries and yet they are stupid enough to cry about a law on the table in America that is not even passed yet?
What the fuck is wrong with some of you people?
Cleanfeed (content blocking system)
From Wikipedia, the free encyclopedia
For other uses, see Cleanfeed (disambiguation).
Cleanfeed is the name given to privately administered ISP
level content filtering systems operating in the United Kingdom and
Canada. It is also the name of a proposed mandatory Australian ISP level
content filtering system which is undergoing testing. These government
mandated programs originally attempted to block access to child
abuse/pornography content located outside of the nation operating the
filtering system. In the UK, its use has now been extended to block
websites that link to copyrighted material.
Cleanfeed is a content blocking system implemented in the UK by BT, Britain's largest Internet provider, which (as of 2008) targets only alleged child sexual abuse content identified by the Internet Watch Foundation. UK Home Office Minister Vernon Coaker instructed all UK ISPs to implement a version of it by the end of 2007 on a voluntary basis, or face legal compulsion.
Cleanfeed was created in 2003 and went live in June 2004.
As well as child sexual abuse content hosted around the world, the
Internet Watch Foundation also takes reports from the public and IT
professionals via its internet Hotline regarding criminally obscene
content and content that incites racial hatred, hosted in the UK. This
content is not included in the IWF URL list supplied to the online
industry for blocking purposes.
In June 2011 the Motion Picture Association began court proceedings in an attempt to force BT to use Cleanfeed to block access to NewzBin2, a site indexing downloads of copyrighted content. BT was ordered to block access to the site in late July and in a later clarification, BT was given two weeks to implement the block starting at the end of October.
There is a blacklist containing URLs
to be blocked. Routers on the edge redirect traffic to IP addresses
that match domains that appear in URLs on the blacklist to special HTTP proxy servers.
These proxy servers then perform the actual filtering by matching HTTP
requests to URLs on the blacklist. Traffic that does not match the
specific URL is forwarded through the proxy filter.
Chapter 7 of a research paper by Richard Clayton provides an overview of the Cleanfeed technology.
In an ISP that has implemented Cleanfeed technology, the routers at the ISP will validate traffic destination against a list of IPs that are suspected of hosting filtered traffic. In the case of no match, the traffic continues as normal to the content host:
In the case that the IP address is found in the list of suspected
sources of unwanted material, the traffic is routed to proxies
(highlighted as IWF proxies) that then verify the specific destination against a more specific blacklist.
This two-pass implementation reduces the load on the proxy servers,
and does not require that all traffic pass through the filtering
The other popular way of blocking content is DNS manipulation. Compared to this, Cleanfeed has the following properties:
- [*]Slightly harder to circumvent, although users can use Open proxys, or Tor (anonymity network), servers can use another port than 80, or HTTPS.[/*]
- Less collateral damage. DNS based blocking is criticized for
blocking all content on a site with the same domain name. Cleanfeed only
blocks what is explicitly blacklisted. For example, it would be
possible to block only one image in an article.
According to a survey conducted in a small number of participants in 2007-8 
"90.21% of all the participants were unaware of the existence of
Cleanfeed software (this percentage was 61.95% for UK based internet
users living in UK for more than 4 years). From the few that have heard
about Cleanfeed software before their participation in the survey, only
14.81% were deeply aware of it, while few have learnt about it by
official statements of the participating bodies (11.1% from UK
government’s statements and 22.2% of BT’s statements).
What’s more, 60.87% of the participants don’t trust BT and 65.22%
don’t trust IWF either to be responsible for a silent censorship model
in UK. The majority of the participants prefer an open censorship model
targeting child abuse content rather no internet censorship at all. So,
65.2% of all the respondents would like to see a message stating that
the website is blocked, 57.3% stated they would like to have access to a
requesting form for unblocking a website and 68.5% that they would like
to see a better and more frequent informing by BT, IWF and UK
Further information: Internet censorship in Australia#Policy of compulsory internet filtering
Cleanfeed in Australia is a proposed mandatory ISP level content filtration system. It was proposed by the Beazley led Australian Labor Party
opposition in a 2006 press release, with the intention of protecting
children who were vulnerable due to claimed parental computer
illiteracy. It was announced on 31 December 2007 as a policy to be implemented by the Rudd ALP government, and initial tests in Tasmania
have produced a 2008 report. Cleanfeed is funded in the current budget,
and is moving towards an Expression of Interest for live testing with
ISPs in 2008. Public opposition and criticism have emerged, led by the EFA
and gaining irregular mainstream media attention, with a majority of
Australians reportedly "strongly against" its implementation.
Criticisms include its expense, inaccuracy (it will be impossible to
ensure only illegal sites are blocked) and the fact that it will be
compulsory. Cleanfeed is a responsibility of Senator Stephen Conroy's portfolio.
Cleanfeed in Canada is a voluntary Internet URL filtering list maintained by Cybertip.ca for use by participating ISPs.
Eight major providers, representing approximately 80% of Canada's
Internet users, have been using the list since November 2006 to block
Accessing child pornography online is illegal in Canada. Cybertip.ca
is recognized by the federal government, provincial governments and
domestic law enforcement agencies for its expertise in assessing the
likely illegality of alleged child pornography online. The Cleanfeed
system, however, does not log access to URLs on the list as it is not a
law enforcement tool.
Criticisms of Cleanfeed
One of the criticisms of the use of Cleanfeed is its potential for
censorship. The lack of transparency regarding the use of Cleanfeed have
lead some to question how much control ISPs and government bodies could
have over internet content within the countries of its use. For
instance, the Home Office in the UK has apparently already asked for
sites that glorify terrorism to be blocked leading some to liken the
powers of censorship, available through use of Cleanfeed, to those
employed currently by China.
Another criticism is that Newzbin claims to have successfully
circumvented Cleanfeed following a court order forcing BT to censor the
website over copyright infringement claims.
This poses the question as to whether websites hosting child
pornography could adopt similar measures to allow their users access to
blocked content .
Finally, information has surfaced that suggests that Cleanfeed could
potentially be manipulated to provide a blacklist of blocked websites.
This is problematic as it could allow the dissemination of child
pornography, rather than the prevention of access to it. Again this has
led some to question Cleanfeed as a successful system for blocking
illegal internet content.
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