Understanding Cisco Cybersecurity Fundamentals (SECFND, legacy) — Question 52

Which type of encryption algorithm uses the same key to encrypt and decrypt data?

Answer options

• A. symmetric encryption algorithm
• B. Diffie-Hellman algorithm
• C. asymmetric encryption algorithm
• D. dodecaphonic algorithm

Correct answer: A

Explanation

The correct answer is A, the symmetric encryption algorithm, which indeed employs the same key for both the encryption and decryption processes. The other options, such as the Diffie-Hellman algorithm, are not encryption algorithms in the same sense; they are used for secure key exchange. Asymmetric encryption algorithms use a pair of keys, one for encryption and a different one for decryption, making them distinct from symmetric methods.