Which of the following methods does NOT contribute to keeping the data confidential?
Which of the following methods does NOT contribute to keeping the data confidential?
The correct answer is D. Referential integrity. Referential integrity is a database concept that ensures relationships between tables remain consistent. It is primarily concerned with data accuracy and consistency, not confidentiality. The other methods—differential privacy, homomorphic encryption, and k-anonymity—are specifically designed to enhance data confidentiality.