The "identity"1 of a person comprises a set of characteristic features of this person - their so called "attributes". These attributes may, together with cryptographic keys, be contained in an electronic identity document (eID). The eID enables its owner to proof its identity in the internet or to sign up with a privacy-friendly pseudonym at an online service.

From the data read out of the eID in the course of an electronic identity proofing, a "derived credential"2 – a so-called "Cloud Identity" – may be created, which can be transferred to a mobile phone for example in order to be used for a pseudonymous authentication or a mobile proof of identity "in the cloud".