When you want to enable secure, authorized data sharing but need to retrieve the raw data for compliance or other purposes.
When you want a partners’ data, but don’t ever need to access its underlying sensitive information. It’s useful when two or more parties want to match customer lists to enrich their profiles, but need to preserve the privacy of their non-mutual customers.
One token for one input. A token that represents Arthur Dent looks the same for all parties.
Tokens are specific to a pair of two collaborators. Bob’s Arthur Dent token for use with Alice is different than his Arthur Dent token for use with Charlie.