[Epic] Pseudonymous / sector-/service-/agency-specific identifiers

Description

Multi-MXIDs and pseudonyms are part Unlinkability and privacy work package. By clarifying the open points we can start designing a solution.

Background information

See ConceptBoard for reference.

• Reference issue: #8 (closed) (should this ticket be an Epic?)
• The following people may help during the clarification: Marco, Josephine

Requirements uIDs: Zapuk_69; LB_15; LB_16

Priority

• low (sometime in the future...)
• medium (important for the current project phase, no project delay yet according to sprint planning)
• high (important for the next sprint)
• utmost urgent (needs to be resolved during the current sprint)

History (documented by team::requirements)

• 21.08.25 Clarify requirements

Next steps (defined by team::requirements)

• See linked ticket description for next steps