The Diffie-Hellman algorithm is used for:

A.
Encryption

B.
Digital signature

C.
Key agreement

D.
Non-repudiation

Explanation:
The Diffie-Hellman algorithm is the first asymmetric key agreement algorithm, which was developed by
Whitfield Diffie and Martin Hellman.
Incorrect Answers:
A, B: The Diffie-Hellman algorithm does not offer encryption or digital signature functionality.
D: Non-repudiation requires digital signature functionality, which the Diffie-Hellman algorithm does not offer.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 812, 813, 830