GIAC
GCIA · Question #68
GCIA Question #68: Real Exam Question with Answer & Explanation
The correct answer is C. Diffie-Hellman. Diffie-Hellman is an asymmetric (public-key) algorithm used for secure key exchange, while the other choices are all symmetric algorithms.
Question
Which of the following is an asymmetric encryption algorithm?
Options
- ABlowfish
- BRC5
- CDiffie-Hellman
- DRC4
Explanation
Diffie-Hellman is an asymmetric (public-key) algorithm used for secure key exchange, while the other choices are all symmetric algorithms.
Common mistakes.
- A. Blowfish is a symmetric block cipher that uses the same key for both encryption and decryption, not an asymmetric algorithm.
- B. RC5 is a symmetric block cipher designed by Ron Rivest that uses a single shared secret key for encryption and decryption.
- D. RC4 is a symmetric stream cipher that uses one shared key for both encrypting and decrypting data.
Concept tested. Asymmetric vs symmetric encryption algorithm classification
Reference. https://csrc.nist.gov/publications/detail/sp/800-56a/rev-3/final
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