Topic: Cryptography
Asymmetric encryption is not suitable for
- A. Confidentiality
- B. Authentication
- C. Key Exchange
- D. Prevention of Denial of Service
Answer: D. Prevention of Denial of Service
Explanation: Asymmetric (public-key) encryption relies on complex mathematical operations, making it computationally heavy. It is excellent for authentication, secure key exchange, and confidentiality of small data payloads. However, its high processing overhead makes it completely unsuitable for mitigating Denial of Service (DoS) attacks; in fact, forcing a server to perform heavy asymmetric decryptions is a common DoS vector.