Who collects your data while visiting other websites?
Who collects your data while visiting other websites? Who collects your data while visiting other websites?

Obtaining and using data, either from public sources or from other ways of monitoring and identification – known as ‘tracking’, is highly useful to collect information about Internet users.

There are many reasons for collecting that information: creation of profiles and behavioral analysis to improve marketing and sales strategies, custom management of pricing, personalized publicity, monetization of obtained information by means of selling then to a third party, individual or collective monitoring, statistics, etc.

Many are the webpages that include external agents, and most of them collect data with a variety of purposes.

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Check that external agents are on the websites you visit

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Check that external agents are on the websites you visit

Information and tips

  • How to prevent being tracked?

  • Currently, web technologies use JavaScript, Flash, Java and cookies almost everywhere, and they count with persistence that normally exceed all basic cleansing tool or mechanism of browsers.

    Neither private navigation, nor tools such as Do Not Track suppose a great improvement. Nevertheless, it is always advisable, after every browsing session, a total cleanse of browser contents and files as first step in protecting our privacy (clear the cache, cookies, and every navigation data). Some browsers allow users to set an automatic clearing after each session or when a private navigation is started.

    Going one step further in our privacy protection, it is also possible to disable every technology above mentioned (Java, Flash, JavaScript, etc.) and to avoid, by this, plug-ins and scripts to be executed. Anyways, this certainly cause a severe deterioration of the navigation experience.

    As alternative measure, some tools, such as uBlock Origin (Chrome, Firefox), can be used to block some domains and/or ad webpages; some others, like NoScript (Firefox) and ScriptSafe (Chrome), can be used to block JavaScript; there are also plug-ins for canvas fingerprinting detection (like CanvasFingerprintBLock), and tools like $heriff, useful for price change detection on Internet sales websites.

  • How is tracking involved in my privacy?

  • In order to identify, classify and collect Internet users’ information, a variety of methods and web technologies can be employed to gather enough information to have a precise profile of a user, so as his/her behavioral patterns.

    These mechanisms are of generalized usage and their impact affects directly to users´ privacy, users who are not able to avoid or prevent this exposure, or to protect their anonymity.

    Let us cite then some of the most used, but not the only ones, techniques to profile users and devices, and which can be grouped as follows:

    • Identifiers on the part of the user (session, cache, local store, cookies)
    • Device/browser fingerprint
    • Other methods: specific behavioral patterns, local preferences, HTTP header injection
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