Certified Ethical Hacker (CEH v10) — Question 40

This asymmetry cipher is based on factoring the product of two large prime numbers.
What cipher is described above?

Answer options

• A. SHA
• B. RSA
• C. MD5
• D. RC5

Correct answer: B

Explanation

The correct answer is RSA, which is specifically designed for public-key cryptography and relies on the mathematical challenge of factoring large prime products. SHA and MD5 are cryptographic hash functions, not encryption methods, and RC5 is a symmetric key block cipher, which does not utilize prime factorization for its security.