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

New technology allows advertisers track targets

'Canvas finger-printing' allows third parties to track which website you visit, and works by asking your browser to draw a small image on the screen. [Provided to China daily]

EU clamped down on cookies sparks race to find a replacement, say researchers.

For advertisers it's very important to see which websites you visit: knowing what you read gives them clues on what you may want to buy. Search for "television reviews" on Google and you may find that next time you're reading the news you'll see adverts for the latest widescreen model crop up in the margins. It will be no coincidence. New technology allows advertisers track targets

To do this advertisers used to use cookies - small text files that were saved in a folder on your PC which tracked where you went and what you saw. You could opt out of this system, but unless you proactively turned cookies off in your browser, the tracking would happen by default.

In May 2012 new EU legislation took effect which required an explicit opt-in before cookies could be created. It helped less technically-savvy people retain their privacy, but an unintended consequence was that it kick-started a race to invent a new, unregulated replacement.

That brings us to "canvas fingerprinting".

Like cookies, this technique allows third parties to track which websites you visit and when, but it also circumvents that EU pesky legislation because it places no files on your PC.

Canvas fingerprinting works by asking your browser to draw a small image on your screen when you visit a website. Certain unique characteristics of your browser and computer mean that this image is drawn in an near-unique way that can be used to identify you. 

The image is analysed, converted into a number via some clever maths and sent back to a third party. All of the website visits with a matching number can then be grouped together to create a profile of what you look at and when. Potentially, we're heading straight back to the unregulated days of cookies.

As well as circumventing EU legislation, this technique also manages to elude most other methods of staying private. Incognito or private modes commonly provided by browsers will not prevent it, nor will advert-blocking software. And there is no special setting in your browser that will turn it off.

There are some ways to stop it, but they are laborious and not for those afraid of tinkering with their computers. The Tor anonymous browsing network will help combat it, as will using the Chamelon browser - but both require technical expertise to set up.

Previous Page 1 2 Next Page

Hot Topics

Editor's Picks
...
...
主站蜘蛛池模板: 大伊香蕉精品视频在线观看 | 欧美肥婆videoxxx | 亚洲日本在线观看视频 | 免费人成在线观看视频不卡 | 国内自拍在线观看 | 波多野结衣中文无毒不卡 | 精品国产一区二区三区免费 | 激情欧美日韩一区二区 | free性丰满白嫩白嫩的hd | 欧美日韩精品国产一区在线 | 久久免费观看国产精品 | 黄色影视频 | 新26uuu在线亚洲欧美 | 国产女人在线观看 | 又黄又刺激下面流水的视频 | 国产欧美日韩三级 | 亚洲一级免费视频 | chinese耄耋70老太性 | 成人在线手机视频 | 欧美精品毛片 | 日本免费特黄aa毛片 | 日本加勒比高清一本大道 | 一级黄色美女视频 | 国产一区二区三区亚洲综合 | 欧美日韩在线视频一区 | 欧美激情一级欧美精品 | 美女被免费网站在线视频软件 | 91专区在线 | 欧美成人另类69 | 美女视频在线观看黄 | 五月色婷婷琪琪综合伊人 | 亚洲精品一区二区久久 | 自拍视频在线 | 高清国产在线播放成人 | 亚洲男人精品 | 国产成人精品福利网站在线观看 | 男人亚洲天堂 | 成人精品视频在线观看播放 | 一区二区三区日本视频 | 奇米888四色在线精品 | a级一级黄色片 |