Certified Data Privacy Solutions Engineer (CDPSE) — Question 187

Which of the following is the PRIMARY reason that a single cryptographic key should be used for only one purpose, such as encryption or authentication?

Answer options

• A. It eliminates cryptographic key collision.
• B. It minimizes the risk if the cryptographic key is compromised.
• C. It is more practical and efficient to use a single cryptographic key.
• D. Each process can only be supported by its own unique key management process.

Correct answer: B

Explanation

The correct answer is B because using a single key for one purpose limits the potential damage if that key is compromised. Options A, C, and D do not address the security implications of key compromise, which is the primary concern in cryptographic practices.