www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

US EUROPE AFRICA ASIA 中文
Business / tech list

New technology allows advertisers track targets

By Matthew Sparkes (China Daily) Updated: 2014-08-09 07:31

This may change, as new evidence suggests it is already in use across large parts of the web.

The fingerprinting technique was invented in 2012 by researchers at the University of California, San Diego, and has already been developed into commercial products by companies including AddThis.

In an academic study due to be published soon, researchers from Princeton University and KU Leuven University in Belgium scoured the top 100,000 sites by Alexa ranking and found that 5.5 percent of them already use canvas fingerprinting. Of those, the vast majority (95 per cent) were using code from AddThis - a company which provides social media sharing widgets. On many sites they provide the buttons which allow you to quickly share links via Facebook or Twitter. This gives them a large foothold across many parts of the web - it reaches 1.6 billion different internet users every month, across 14 million domain names.

Sites running the code includes whitehouse.gov, CBS and porn giant YouPorn.com, according to researchers.

The company's approach to canvas fingerprinting draws the phrase "Cwm fjordbank glyphs vext quiz", which uses every letter in the alphabet exactly once, in a small, invisible part of a website - you won't see it, it's done entirely in the background. Other services which used the technology include dating website Plenty of Fish.

AddThis said that if users install an opt-out cookie on their computers then it will not use the data collected for advertisement targeting. Use of the technique has simply been a trial for research and development purposes, it claims.

According to reports in ProPublica, the company did not tell any of the websites that it is used on that it had begun trials using the canvas fingerprinting technology. It now plans to drop the trials because they are "not uniquely identifying enough".

The company did not reply to a request for comment from the Telegraph.

A YouPorn.com spokesperson told ProPublica that the site was "completely unaware that AddThis contained a tracking software that had the potential to jeopardize the privacy of our users." It has removed all AddThis technology from its site.

Previous Page 1 2 Next Page

Hot Topics

Editor's Picks
...
...
主站蜘蛛池模板: 国产精品国产欧美综合一区 | 亚洲精品色 | 美国一级免费毛片 | 毛片免费在线播放 | 亚洲视频在线免费看 | 97在线碰碰观看免费高清 | 毛茸茸年轻成熟亚洲人 | 国产真实一区二区三区 | 国产高清国产专区国产精品 | 手机在线精品视频每日更新 | 亚洲精品一区二区中文 | 亚洲一区二区三区久久精品 | 成人毛片网站 | 精品久久久久久影院免费 | 欧美激情久久久久久久久 | 日韩色道 | 在线观看免费av网站 | 亚洲国语在线视频手机在线 | 国产精品久久久久久一区二区三区 | 国产日韩精品一区在线不卡 | 久久久精品影院 | 欧美亚洲综合另类在线观看 | 日韩亚洲欧美一区 | 一区在线免费观看 | 亚洲欧美一区二区三区在线观看 | 色黄网站aaaaaa级毛片 | 成年女人免费观看视频 | 免费国产成人高清视频网站 | 久久精品成人欧美大片免费 | 亚洲国产综合人成综合网站00 | 一区二区三区视频网站 | 精品国产一区二区三区不卡在线 | 欧美刺激午夜性久久久久久久 | 国产精品久久久久久久久久久不卡 | 神马最新午夜限制片 | 免费亚洲视频在线观看 | 久久久国产99久久国产首页 | 免费精品久久 | 香港三级日本三级人妇网站 | 澳门毛片在线播放 | 99精品在线播放 |