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Table: A hash grid table describing the different states of of active and passive identifiers. The two states of passive identifiers are highlighted.
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An immutable identifier used to identify a non-governing entity, an inanimate object, or a static data inputitem. A passive identifier can either be (1) controlled by an active identifier or (2) not controlled.
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The figure shows an instance when the DID subject may not be the same as the DID controller. In this scenario, the subject may represent a passive non-governing entity, an inanimate object or a static data input item with the controller’s DIDs being active, requiring a signing key for identity authentication. Through the authentication process, the controller is able to express ownership, control, or management of the passive resource.
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An identifier that has an association with a cryptographic hash of digital content that can be used for linking information across a number of objects, applications, and/or systems. A linking identifier can be referenced in multiple locations and, as such, changing any single reference of the linking identifier should propagate throughout the daisy chain. As a linking identifier tends to be governed, this threading property works well for data revocation where a governing entity has the capability of revoking all data associated with the linking identifier.
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