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Which of the following BEST protects the credit card data?

A merchant acquirer has the need to store credit card numbers in a transactional database in a high
performance environment. Which of the following BEST protects the credit card data?

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A.
Database field encryption

B.
File-level encryption

C.
Data loss prevention system

D.
Full disk encryption

Explanation:
Database encryption makes use of cryptography functions that are built into the database software to encrypt
the data stored in the data base. This often offers granular encryption options which allows for the encryptions
of the entire database, specific database tables, or specific database fields, such as a credit card number field.

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