Priya moved apartments. Seven companies knew by dinner.
A new address meant a weekend of forms: bank, mobile carrier, insurer, employer, gym, clinic, tax office. Two of them still sent letters to the old flat months later.
She updated her address once, in her vault, signed with her own key. Every company with an active grant read the new value the next time it needed it.
One change, and a list of every company that has read it since.
The current, verified address whenever it asks. No record to update or secure.
A signed proof that the address changed. Never the address itself.
One update. Seven companies current. No copies to leak.