1. Method for reading at least one attribute stored in an ID token, whereby the ID token is assigned to a user with the following steps: authenticating the user relative to the ID token, authenticating a first computer system relative to the ID token, after successful authentication of the user and the first computer system relative to the ID token, the first computer system performs a read access of the at least one attribute stored in the ID token for transmission of the at least one attribute after its signing, along with a time indication and a transaction identifier, to a second computer system, whereby the generation of the time indication for the at least one attribute is carried out by the first computer system.