1. A system for managing digital identification documents, the system comprising: a first mobile device of an individual, the first mobile device configured to: provide a user interface whereby the individual can cause a first digital identification document of a plurality of digital identification documents identifying the individual to be created according to preferences of the identified individual by selecting for inclusion in a first set of attributes about the identified individual a first subset of available attributes among a plurality of available attributes about the identified individual and by causing the first mobile device of the identified individual to transmit the selection of the first subset of available attributes for inclusion in the first set of attributes to a computer system of a representative of an identification authority; receive from the computer system of the representative of the identification authority, the plurality of digital identification documents, each of the plurality of digital identification documents including a differing plurality of attributes about the identified individual and a digital signature, wherein the plurality of digital identification documents includes the first digital identification document that was created by the computer system of the representative of the identification authority in response to the receipt of the transmission of the selection of the first subset of available attributes for inclusion in the first set of attributes; provide the user interface, whereby the identified individual can make a selection of a digital identification document of the plurality of digital identification documents; transmit, based on the selection of the selected digital identification document, the selected digital identification document to a second mobile device of a first challenger, whereby the first challenger is able to determine the validity of the selected digital identification document by analyzing its digital signature; provide the user interface, whereby the identified individual can make a second selection of a second selected digital identification document of the plurality of digital identification documents; and transmit, based on the second selection, the second selected digital identification document from the first mobile device of the identified individual to a third mobile device of a second challenger, whereby the second challenger is able to determine the validity of the second selected digital identification document by analyzing its digital signature.