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    PracticeCPA®CPA ISC Practice Exam 5Question 54
    Medium1 markMultiple Choice
    Area II: SecurityConfidentialityData ProtectionArea II

    CPA · Question 54 · Area II: Security

    A company replaces sensitive credit card numbers in their database with a random string of characters that has no mathematical relationship to the original number. The mapping is stored in a secure vault. This technique is called:

    Answer options:

    A.

    Encryption

    B.

    Hashing

    C.

    Tokenization

    D.

    Masking

    How to approach this question

    Key phrase: 'no mathematical relationship'.

    Full Answer

    C.Tokenization✓ Correct
    Tokenization replaces sensitive data with a non-sensitive equivalent (token). Unlike encryption, you cannot mathematically reverse a token to get the data; you must look it up in the vault.

    Common mistakes

    Confusing Tokenization with Encryption.
    Question 53All questionsQuestion 55

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