A diversifier is a set of additional attributes (next to the base identity) that is used to form a pseudonym.
Diversifiers are used in (Direct) Encrypted Pseudnonyms (see Encrypted structures) and can be present as key-headers within DRKi and Migration Keys (see DV-key format). Within the structures and key-headers, the Diversifiers are represented as a list of key-value pairs.
The following rules apply to all diversifiers:
- Diversifiers MUST be sorted by key alphabetically ascending
- Keys MUST be unique within the list
Both keys and values MUST conform to the following Syntax in ABNF ( https://tools.ietf.org/html/rfc5234) :