Understanding Cisco Cybersecurity Fundamentals (SECFND, legacy) — Question 82

Which hashing algorithm is the least secure?

Answer options

• A. MD5
• B. RC4
• C. SHA-3
• D. SHA-2

Correct answer: A

Explanation

MD5 is considered the least secure hashing algorithm due to its vulnerabilities to collision attacks, making it unsuitable for security-sensitive applications. In contrast, RC4 is a stream cipher, while SHA-3 and SHA-2 are more secure hashing algorithms designed to address the weaknesses found in MD5.