Trusted Third Party 

IMI Code of Practice: The person or body that, in the case of pseudonymised data, is in charge of holding the key so as to safeguard the privacy of the patient or study participant [44]. The trusted third party has to act in an independent manner. It ensures that the re-identification key is not disclosed to anyone not authorised to access. [44] The Trusted Third party is responsible for keeping the “pseudonymising key” and shall not disclose it to anyone, unless otherwise authorised.