Question 770
A fraud analytics pipeline must protect direct identifiers while retaining useful linking semantics. A reviewer sees that engineers chose Use controlled reversible tokenization with a restricted mapping vault. To verify Authorized internal reidentification is necessary for customer service support, what should the reviewer observe?
Explanation
Correct Answer
Only the trusted service role can resolve tokens to the original identifier directly measures whether Use controlled reversible tokenization with a restricted mapping vault achieved the requirement “Authorized internal reidentification is necessary for customer service support.” It checks the operating result rather than just a configured resource name.
Incorrect Answers
The partner sees only the allowed age band rather than full date would demonstrate the separate action Generalize precise dates into approved age ranges, which addresses “A birth date should be coarsened to an age band to reduce identification risk.” It does not verify the requirement “Authorized internal reidentification is necessary for customer service support” following Use controlled reversible tokenization with a restricted mapping vault.
Matching source IDs yield consistent digests without a published mapping table pertains to a different control (Use a suitable cryptographic one-way keyed hash with secret management) and a different need (A nonreversible representation is required for equality matching without a secret table). It cannot establish that Use controlled reversible tokenization with a restricted mapping vault met the stated goal.
This signal belongs to the adjacent case “The same customer should map consistently across datasets without revealing the original ID,” whose remedy is Use controlled keyed tokenization or HMAC pseudonymization. The observed result for the present requirement is Only the trusted service role can resolve tokens to the original identifier.