While developing a solution for storing personal records, an engineer wants to replace real data with placeholders to reduce risk from unauthorized access. Which approach best meets the principle of tokenization for safeguarding these records? Choose the best answer.
Applying a one-way cryptographic method that lacks traces to actual data.
Isolating personal fields in a separate environment and referencing them with stand-in identifiers.
Storing an obscured representation with multiple hashing steps for stored values.
Using symmetrical keys to scramble data on the server.
Substituting placeholders while the actual data remains in a secure location aligns with the idea of using stand-in references. This allows partial retrieval when approved, whereas encryption or hashing approaches can complicate retrieval by requiring additional cryptographic operations or making it hard to restore data in a practical way.
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