E-training for personal data management and privacy

If you want to protect your privacy, it is first necessary to define in which cases it is data worth protecting.

Basically, data that is worth protecting is data that can cause damage if misused, either on its own or by linking it to other data. This can be personal data (e.g. PIN, TAN, health data, ...) or factual data (e.g. setting for alarm system, company secrets, ...). 

More detailed information is also available here: Information privacy - Wikipedia