Do Not Track
Do Not Track (DNT) (English for " do not track " ) is called an HTTP header field and signaled a Web page or Web application to request that this created on the activities of the visitor no usage profile. DNT was proposed by Christopher Soghoian, Sid Stamm and Dan Kaminsky, 2009. It is currently standardized by the W3C. Firefox was the first browser that supported this field, later followed by Internet Explorer (version 9), Safari, Opera and Chrome.
History of Do Not Track
In 2007, several consumer groups asked the Federal Trade Commission (FTC, the Bundeshandelskommmision the U.S.), if it was possible to create a DNT list for online advertising. It has been suggested that online advertisers must submit information to the FTC so that they can create a machine-readable list of domain names of those companies who place cookies or use other means to track consumers.
The DNT feature has been proposed by researchers Christopher Soghoian, Sid Stamm and Dan Kaminsky in 2009 and is currently on the World Wide Web Consortium (W3C ) standardized. In July 2009, Christopher Soghoian and Sid create home a first prototype add-on for the Firefox web browser, which implements support for the DNT header function. Tribe was at the time data protection engineer at Mozilla. Soghoian began soon after for the FTC to work.
A year later, are FTC Chairman Jon Leibowitz during a hearing of the U.S. Senate on the subject of privacy the Senate Commerce Committee compared to that, the Commission explored the idea of a "Do- Not-Track " list.
In December 2010, the FTC publishes a privacy report, in which a "do not track " system is presented. This enables people to avoid that their actions are being monitored online.
A week later, also in December 2010, Microsoft announced support for the DNT feature for its web browser Internet Explorer 9 (IE 9). In future, these users so-called blacklists ( dt blacklists ) offer by a third party, to protect them from persecution. From the Internet Explorer 10, the DNT feature is enabled by default and must be deactivated by the user when it wants to.
In January 2011, Mozilla announced that their browser will support future DNT header. So follow Mozilla Firefox 4.0 Beta 11, Apple's Safari and Opera.
DNT is supported by Google Chrome since version 23.
On 7 March 2011, a draft of Mozilla's DNT was submitted to the IETF.
Operation
The header field called " DNT " currently accepted three states:
- "1" = in this case would not be pursued, the user (opt out)
- "0" = in this case, the User agrees to persecution (opt in ) or
- "null" ( No delivery of the header ) = The user has not set any appropriate preference.
The default is the latter case, so that the headers are not sent. Only when the user makes the appropriate settings in the browser, the other options are designed depending on if the user wants to. An exception here is the Internet Explorer Version 10, the default is always " 1" sends ( see above).
When a web browser requests content or sends data over HTTP, it can add optional additional information in one or more than "header" designated fields. Is the DNT header set to the value 1, this implies that the user wishes to not be tracked.
The execution of these non- tracking policy can be implemented only on the HTTP server, compliance is voluntary. In this respect is similar to the DNT robots exclusion standard. This mechanism for HTTP server ensures that automatic web clients (so-called " web crawlers " or "robots" to German robot ) can read files that determine whether and how a website of crawlers may be searched. Again, not a complete account of guarantees, as compliance to be done by the web crawlers.
Effectiveness
Worldwide Internet pages are legally not obliged to respect DNT requests and adhered to. The W3C has so far produced is still no consensus between the advertising industry and the Federal Trade Commission in the U.S.. In Europe, the proposed DNT header in the not met " zero " position the ePrivacy by Article 5, paragraph 3 Directive specified requirements for informed consent for the setting and reading of cookies. Internet sites that violate ignore the IE 10 the default setting "1" of Article 5 § 3 ePrivacy Directive. Data protection supervisory authorities prosecuted violations of the so-called cookie - products in the first two years after its introduction not.
However, the German data protection authorities are agreed that the setting of the DNT header to 1 " of the Declaration of a contradiction within the meaning of § 15 para 3 TMG equals ". Such contradictions are to be respected by providers of Telemedia. Service providers may so if this option is set, then create user profiles when they refrain from the use of cookies.