互联网广告客户如何使用第三方Cookie？ [英] How Do Internet Advertisers Use Third-Party Cookies?

问题描述

如果给定的网络服务器只能从其自己的域内设置的Cookie中读取Cookie，那么互联网广告客户如何跟踪来自网络外部网站的用户的网络流量？

If a given web server can only read cookies from those set within its own domain, how do Internet advertisers track user's web traffic from websites outside of their network?

是否有某种类型的 supercookie 全球广告系统，允许广告客户检索高级域名Cookie，然后查询一些服务器（从关联企业），其中包含用户已经在哪里的信息。

Is there some kind of "supercookie" global advertising system that allows advertisers to retrieve upper-level domain cookies and then query some server (from an affiliate) that houses information about where that user has been?

更新：

为了澄清我的问题，在example2.com上发布广告的广告客户有可能确定我访问过特定网站

To clarify my question, is it possible for an advertiser that publishes ads on "example2.com" to ascertain that I visited a particular site "example1.com" if they had never served an ad on a page from "example1.com"?

推荐答案

如果他们从未在example1.com的某个网页上投放过广告，为supercookie。每个服务器都读取其自己的域的Cookie。服务器通过URL将信息彼此传递。

There is no need for a "supercookie". Each server reads its own domain's cookies. The servers pass information to each other through URLs. (Or, less commonly, through backchannels.)

例如，假设您访问 example.com 。您有一个 example.com Cookie，其中显示 user = 1032354 。您可以检索 http://www.example.com 。当然，你发送的web服务器你的cookie。它在网页中输出以下内容：

For example, say you go to example.com. You have an example.com cookie that reads user=1032354. You retrieve http://www.example.com. Of course, you send the web server your cookie. It spits out the following in the web page:

<IMG href="http://www.advertiser.exmaple/add.cgi?source=example.com&user=1032354">

当然，当您的浏览器转到 www.advertiser.example 获取图片，它会高兴地发送 advertiser.example Cookie。现在， advertiser.example 的服务器知道您在其网站上的哪个用户（从您发送的Cookie）和您所在的用户示例.com （从URL）。

Of course, when your browser goes to www.advertiser.example to get the image, it happily sends the advertiser.example cookie. Now, the server at advertiser.example knows which user you are on its site (from the cookie you sent it) and which user you are on example.com (from the URL).

使用backchannel方法，它的操作更类似：

With the backchannel method, it operates more like this:

1）您转到 www.example.com ，并将其发送给您的 example.com cookie

1) You go to www.example.com and send it your example.com cookie.

2） example.com 的网络服务器从Cookie获取您的用户ID，并发送JSON请求到 advertiser.example 为您创建一个会话。它传递了你的 example.com 用户ID。

2) The web server at example.com gets your user ID from the cookie and sends a JSON request to advertiser.example to create a session for you. It passes it your example.com user ID.

3）Web服务器发出一个图像链接到 advertiser.example 与第2步中创建的会话ID。

3) The web server spits out an image link to advertiser.example with the session ID created in step 2.

4）当您的浏览器连接到 advertiser.example ，它会在标题和网址中的会话ID中发送 advertiser.example cookie。

4) When your browser connects to advertiser.example, it sends the advertiser.example cookie in the headers and the session ID in the URL.

5） advertiser.example 的服务器现在可以将您的会话与自己的用户记录和用户记录关联在

5) The server at advertiser.example can now associate your session with their own user record and your user record at example.com and it can spit out an appropriate ad.

也可以通过引荐来完成。

It can also be done through referrers.

更新：主要网站不需要Cookie。单个广告客户Cookie可以。

Update: No cookie is needed at the main sites. A single advertiser cookie will do.

1）您访问某个网站时，您不会发送Cookie。网站会为您分配一个新工作阶段。

1) You go to a site, you send no cookie. The site assigns you a new session.

2）网页有一个嵌入图片连结到广告客户网站，而网址中嵌入了工作阶段。

2) The web page has an embedded image link to the advertiser's site with the session embedded in the URL.

3）您获取嵌入的图片，发送您的会话ID（在网址中）和您的Cookie（对于广告客户的网站）。

3) You fetch the embedded image, sending your session ID (in the URL) and your cookie (for the advertiser's site).

4）广告客户现在将您在主要网站上的会话与您的数据库中的帐户相关联。它通过后台频道，嵌入到网址或其他方式将此内容传达给网站的网络服务器。

4) The advertiser now associates your session on the main site with your account in their database. It communicates this to the site's web server through a back channel, embedded in an URL, or other means.

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