Abstract: The invention relates to a method for providing an anonymized value for a data element stored with an original value in a database of a database system, wherein the method comprises the following steps: (i) producing a supplementary data element for the data element stored in the database; (ii) determining the anonymized value of the data element from the original value on the basis of a mapping rule for ascertaining anonymized values that is stored in the database system, and storing the anonymized value in the supplementary data element; and (iii) linking the supplementary data element to the data element such that, based on the reception of an access command relating to the data element from a user connected to the database system, the supplementary data element is read and the anonymized value contained therein is transmitted to the user.