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Though users are protected against being tracked without caution by the validation of the actual European declaration of data security, there are still capabilities within actual browsers to attach tracking IDs. This includes among others the localStorage area of the browser, which can be used by JavaScript as long-lasting cache.

Many browsers offering functionality for anonymization features like this will not prevent tracking adequately with the tested browsers so far.

Particularly, in the view of the fact that algorithms are not able to differ normal data from tracking IDs that also could be masked additionally to be not detected. Tracking can be prevented by deleting the cache (temporary memory) or the localStorage area of the pages directly.

That is why the European declaration for data security needs to be updated to regulate this use of tracking IDs within by now gray areas and forcibly induces creators of Internet applications to tender the usage of those in the declaration of data security.

By the following example, each user of a JavaScript capable browser can test how localStorage variables are set and read out again. (F12 -> Console [Please try this within a new window/tab, since you must have an authorization to do so on our page]):

>localStorage.setItem(ID, 712398z21kljfds0921);
<undefined
>localStorage.getItem(ID);
<712398z21kljfds0921