久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

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
...
...
久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    久久观看最新视频| 国产精品人人爽人人爽| 男人搞女人网站| 超碰97免费观看| 熟妇人妻无乱码中文字幕真矢织江 | 欧美日韩一区二区三区电影| 分分操这里只有精品| 自拍偷拍一区二区三区四区| 日韩av中文字幕第一页| 亚洲一区精品视频在线观看| 国产精品免费入口| 9191国产视频| 一起操在线视频| 久草资源站在线观看| 国产精品免费看久久久无码| www.这里只有精品| 久久美女福利视频| 久艹在线免费观看| japanese在线视频| 深夜黄色小视频| 黄色片视频在线免费观看| 日本高清视频免费在线观看| 亚洲娇小娇小娇小| 激情网站五月天| 久久久久久久久久久99| 日韩精品久久一区二区| 四虎1515hh.com| 久热精品在线播放| 男人的天堂日韩| 日日鲁鲁鲁夜夜爽爽狠狠视频97 | 无码人妻精品一区二区三区66| www插插插无码视频网站 | 免费在线激情视频| 精品久久久久久无码中文野结衣| 国产一区一区三区| 九九九久久久久久久| 香蕉视频999| 亚洲欧美激情网| 日本久久精品一区二区| 欧美日韩第二页| 鲁一鲁一鲁一鲁一澡| 僵尸世界大战2 在线播放| 青青草视频国产| 日韩视频 中文字幕| 粉嫩av一区二区三区天美传媒 | 日本韩国欧美在线观看| 精品无码国产一区二区三区av| 欧美一二三不卡| 青青青在线观看视频| 欧美成人精品免费| 免费国产黄色网址| 一女被多男玩喷潮视频| 草草久久久无码国产专区| 免费看国产一级片| 777久久久精品一区二区三区| 妞干网在线视频观看| 免费成人在线视频网站| 国产成人无码av在线播放dvd| 久久久久久久久久久久久国产精品| 欧美日韩在线中文| 久草在在线视频| 亚洲欧美自偷自拍另类| 国内自拍第二页| 自拍偷拍视频在线| 国产在线视频综合| 国产亚洲精品网站| 亚洲一区二区三区四区五区xx| 欧美性猛交久久久乱大交小说| 色国产在线视频| 中文字幕第22页| 少妇久久久久久被弄到高潮| 久久国产精品网| 国产高清精品在线观看| 亚欧在线免费观看| 在线播放免费视频| 国产欧美123| 精品国产一二三四区| mm1313亚洲国产精品无码试看| 日韩av在线中文| 中国老女人av| 国产男女无遮挡| 亚洲精品手机在线观看| 潘金莲一级淫片aaaaa免费看| 日韩中文字幕在线免费| 999在线免费视频| 日韩 欧美 自拍| 凹凸国产熟女精品视频| 爱爱爱爱免费视频| 777久久精品一区二区三区无码 | 99九九精品视频| 视色,视色影院,视色影库,视色网 日韩精品福利片午夜免费观看 | 久久出品必属精品| 大陆av在线播放| 邪恶网站在线观看| avav在线播放| 50路60路老熟妇啪啪| 天天综合成人网| 日韩国产一级片| 天天干天天操天天玩| 成人免费在线网| 少妇一级淫免费放| 免费在线看黄色片| 国产无色aaa| 黄色网页免费在线观看| 97超碰人人爽| 鲁一鲁一鲁一鲁一色| 国产999免费视频| 国产精品沙发午睡系列| 性久久久久久久久久久久久久| 色欲色香天天天综合网www| 小明看看成人免费视频| 成年人网站免费视频| 午夜免费福利视频在线观看| 欧美国产激情视频| 红桃一区二区三区| 中文字幕永久视频| 乱人伦xxxx国语对白| 欧美一级免费在线| 免费看a级黄色片| 国产亚洲黄色片| www.午夜色| 天天干天天玩天天操| 1024av视频| 九一免费在线观看| 五月天激情播播| 成人小视频在线看| 久久视频这里有精品| 国产911在线观看| 在线观看国产中文字幕| 精品99在线视频| 国产激情在线看| 久久6免费视频| 国产成人手机视频| 男人操女人免费软件| 精品视频在线观看一区| 水蜜桃在线免费观看| 91 视频免费观看| 在线观看的毛片| 国内外成人免费激情视频| 性欧美大战久久久久久久| 中文字幕在线中文| 妞干网这里只有精品| 午夜一级免费视频| 日本中文字幕二区| 亚洲欧美日韩一级| 91香蕉视频污版| 99视频免费播放| 成人在线激情网| 欧洲黄色一级视频| www.中文字幕在线| 久久国产精品视频在线观看| 久操网在线观看| www.夜夜爱| 男女日批视频在线观看| 欧美精品卡一卡二| 野外做受又硬又粗又大视频√| 国产欧美精品aaaaaa片| 日韩一级特黄毛片| 精品人妻人人做人人爽| 国产精品久久久久9999爆乳| 久久久久久久久久伊人| 精品国偷自产一区二区三区| 99在线免费视频观看| 99在线精品免费视频| 国产白丝袜美女久久久久| 日本免费不卡一区二区| 成熟老妇女视频| 日本三区在线观看| 九九热在线免费| www.日本一区| 国产九九九视频| 亚洲av综合色区| www..com日韩| 999香蕉视频| 中文字幕第38页| 国产九九九视频| 黄色三级中文字幕| 国产91美女视频| 网站一区二区三区| 天天操天天干天天做| 国产免费一区二区三区四在线播放| 国产树林野战在线播放| 成人免费a级片| 国产v片免费观看| 三级在线免费看| 精品久久免费观看| 欧美精品久久久久久久久久久| 欧美aⅴ在线观看| 色乱码一区二区三区在线| 国产美女视频免费| 久久成人福利视频| 日韩福利视频在线| 国产精品嫩草影视| 欧美精品久久久久久久自慰| caopor在线视频| 亚洲综合激情视频| 国产精品久久久久9999爆乳| 粗暴91大变态调教| 天天做天天爱天天高潮| 熟女少妇在线视频播放|