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Glossary beginning with T

Click one of the letters above to go to the page of all terms beginning with that letter.
Third country

A third country is a country which has not adopted a national law for the implementation of Directive 95/46/EC - as opposed to the 28 Member States of the EU and the three European Economic Area (EEA) countries Norway, Liechtenstein and Iceland. Third countries need to ensure an adequate level of protection for personal data in order to enable transfers of personal data from the EU and EEA Member States to them. The effect of such a decision is that personal data can flow from the EU and EEA Member States to that third country (within the limit of the material scope as described by each Decision) without any further safeguards.

Third Party

Any natural or legal person, public authority, agency or any other body other than the data subject, the controller, the processor and the persons who, under the direct authority of the controller or the processor, are authorized to process the data.


Potential cause of an unwanted incident, which may result in harm to a system or organization.

Transaction Pseudonym

A pseudonym that is used for a specific transaction only, i.e., for each transaction, a different pseudonym is used.


The property of a system, organisation or individual of providing visibility of its governing norms, behaviour and compliance of behaviour to the norms.

Transparency Enhancing Tool (TET)
Transparency, ex ante

It is concerned with the anticipation of consequences before data is actually disclosed (e.g. in the form of a certain behaviour).

Transparency, ex post

It is concerned with informing about consequences if data already has been revealed.


Trust (or, symmetrically, distrust) is a particular level of the subjective probability with which an agent assesses that another agent or group of agents will perform a particular action, both before he can monitor such action (or independently of his capacity ever to be able to monitor it) and in a context in which it affects his own action.


The attribute of a person or enterprise that provides confidence to others of the qualifications, capabilities, and reliability of that entity to perform specific tasks and fulfil assigned responsibilities.