Methods and systems of securely sharing data

A computer implemented method for securely sharing underlying data of a data owner to a data recipient, said method comprising:

• providing access to the underlying data of the data owner to a sharing intermediary;
• obtaining personalised data confidence information from the data owner and providing said personalised data confidence information to the sharing intermediary;
• storing said underlying data and said personalised data confidence information at the sharing intermediary, wherein the personalised data confidence information is associated with the underlying data;
• supplying a data passphrase generated by the sharing intermediary to the data owner, said data passphrase uniquely identifying said underlying data;
• supplying the data passphrase and the data confidence information from the data owner to the data recipient;
• providing the data passphrase and the data confidence information from the data recipient to the sharing intermediary;
• checking, by the sharing intermediary, whether the data passphrase is associated with stored underlying data;
• and
• supplying the underlying data from the sharing intermediary to the data recipient if the data confidence information matches the personalised data confidence information associated with the underlying data.