Sensitive personal data is personal data that is sensitive in nature and has stronger protection. As a general rule, the processing of sensitive personal data is prohibited. Examples of sensitive personal data are ethnic origin, political opinions, religious affiliations, trade union membership, health, sexual life, genetic data, etc. Before processing such data, it must be ensured that there is a support for such processing. Social security numbers and other national identification numbers are extra worthy of protection. They may be treated if there is consent, but in the absence of such consent, they may be treated only if it is clearly justified for a significant reason.