Which of the following is an example of data pseudonymization?

• A. Replacing real names with unique identifiers
• B. Encrypting user passwords
• C. Deleting user data after a period
• D. Reducing file size

Answer: (A)

Data pseudonymization refers to the process of replacing private identifiable information with artificial identifiers or pseudonyms, allowing data to be processed without directly exposing private information. This method helps in maintaining privacy while still permitting analysis or processing of data.

Replacing real names with unique identifiers exemplifies this concept perfectly. By doing so, the actual identity of individuals is obscured, which can help in protecting privacy while still allowing data to be utilized for analytical purposes. This action meets the definition of pseudonymization, as the underlying data is transformed in such a way that it can no longer be attributed to a specific data subject without additional information.

In contrast, encrypting user passwords focuses on securing these passwords against unauthorized access but does not alter the identity associated with the data in a pseudonymous way. Deleting user data might protect privacy but does not maintain the usability of data for processing or analysis. Reducing file size does not relate to privacy or pseudonymization at all; it’s merely a technical action that deals with data storage efficiency.