Which of the following is an example of a protective measure for digital information?

Data masking is an effective protective measure for digital information as it involves obscuring specific data within a database so that it remains usable for testing or training purposes while protecting sensitive information from unauthorized access. By replacing original data with modified content that has a similar format but is not identifiable, organizations can reduce risks associated with data exposure while complying with privacy requirements.

This technique ensures that when environments like development or testing are shared or used, sensitive information, such as personally identifiable information (PII), remains confidential and protected from potential threats or breaches. It plays a crucial role in data security strategies, particularly in environments where data sharing is necessary, yet maintaining confidentiality is a priority.

Other options mentioned might contribute to overall security but do not specifically address the protection of digital information in the context of data handling and privacy as effectively as data masking does.