Online shopping Cookies threaten user privacy and prevent leaks

 

Using cookies to track user access to instances when a user searches for products on a shopping website, many ads related to the search targets are displayed on the webpage. However, when these shopping websites are closed before accessing other sites, many users still find the product advertisement they searched for on the page. This indicates that the user's browsing behavior has been tracked by the Advertising Code and "targeted advertising" without knowing it.

According to security experts, although to a certain extent, the advertising of targeted advertisements can meet the needs of consumers, while meeting such demands, it also exposes the privacy information of users' Webpage Browsing operations. So how do internet users prevent advertising tracking and protect their privacy information from being tracked and leaked when browsing the Web page?

　　 Use cookies to track user access to instances

Currently, many e-commerce websites use cookies to record and Display User Access behaviors, and place ads targeted to users.

When a user visits the page for the first time, because the program does not record the product information that the client user is interested in, the displayed content is "the user has not browsed any products! ".

Trigger prevention and tracking of Cookies

After a user has accessed some products, the program will write a Cookie file to record the information of the products that the user recently accessed and display the corresponding product content.

<Iframe allowtransparency = "" class = "weibo_assist_button" frameborder = "0" height = "24" scrolling = "no" src = "http://hits.sinajs.cn/A1/weiboshare.html? Export & ralateUid = & language = zh_cn & rnd = 1362541676363 "style =" DISPLAY: none "width =" 106 "> </iframe>

As you can see, you can use simple code to track user browsing behaviors through cookies, and display the products that users are interested in for the last visit. Here, the type value of the product type is tracked and the corresponding information is saved in the Cookie file. During the parsing process, only the server knows what the type value means, and what kind of processing is performed after the server obtains the type value, which cannot be found by others. In addition, the information value can be encrypted, and the encryption algorithm can also be implemented through self-write encryption. Others cannot decrypt the data.

In the actual network environment, the code for tracking user behavior is much more complex than the demo program used here, And the implementation function is also more complex.

Three security experts prevent and track Cookies

Based on the principles and features of Cookies, security experts offer Internet users the following three tips:

1. Prevent tracking Cookies by disabling Cookies, enabling Cookies security warnings, or deleting operation-related Cookies after each access.

2. Install and enable the browser software that supports Do Not Track (DNT. Currently, the latest versions of mainstream browser software support the disable tracking function, such as Microsoft IE browser, Firefox browser, and Google Chrome browser, after installing such browsers, users can avoid the leakage of personal privacy caused by advertisement tracking to a certain extent.

3. Users can track Cookies through security software. Currently, some security software in the network environment supports the clearing and defense functions of Cookies. Users can use this method and enable the corresponding blocking and tracking functions to intercept and prompt advertisement tracking.