Certified Ethical Hacker (CEH) — Question 24

Which of the following is a characteristic of Public Key Infrastructure (PKI)?

Answer options

• A. Public-key cryptosystems are faster than symmetric-key cryptosystems.
• B. Public-key cryptosystems distribute public-keys within digital signatures.
• C. Public-key cryptosystems do not require a secure key distribution channel.
• D. Public-key cryptosystems do not provide technical non-repudiation via digital signatures.

Correct answer: B

Explanation

The correct answer is B because public-key cryptosystems are designed to embed public keys in digital signatures, enabling verification of the signature's authenticity. A is incorrect as symmetric-key cryptosystems are generally faster than public-key ones. C is misleading because while PKI reduces the need for secure key distribution channels, it does not eliminate the requirement entirely. D is false since PKI provides non-repudiation through digital signatures.