When using pseudonymization to prevent unauthorized access to personal data, which of the following is the MOST important consideration to ensure the data is adequately protected?

When using pseudonymization to prevent unauthorized access to personal data, which of the following is the MOST important consideration to ensure the data is adequately protected?
A . The data must be protected by multi-factor authentication.
B . The identifier must be kept separate and distinct from the data it protects.
C . The key must be a combination of alpha and numeric characters.
D . The data must be stored in locations protected by data loss prevention (DLP) technology.

View Answer

Answer: B

Explanation:

Pseudonymization is a technique that replaces direct identifiers in a data set with pseudonyms or artificial identifiers that do not reveal the identity of the data subjects. Pseudonymization reduces the linkability of the data set with the original identity of the data subjects and thus enhances the privacy and security of the data. However, pseudonymization is not irreversible and the original identity can be re-established if the pseudonym or key is compromised. Therefore, it is important to keep the identifier separate and distinct from the data it protects and to apply additional security measures to safeguard the identifier. The other options are not relevant to pseudonymization1, p. 74-75

Reference: 1: CDPSE Review Manual (Digital Version)