ITPEC FE Morning October 2022 Question 36
Source exam: ITPEC FE Morning October 2022Topic: Security
ITPEC FE Morning October 2022 — Question 36 of 80
AES — Symmetric Encryption — identify the algorithm that uses the same key for encryption and decryption.
The requirement says: encrypt with a key, decrypt with the same key → this is symmetric encryption.
- •AES — symmetric cipher, one key for both encrypt and decrypt ✅
- •Diffie-Hellman — key exchange protocol, does not encrypt data itself
- •RSA — asymmetric encryption (public + private key pair), uses different keys
- •SHA-256 — hash function, one-way transformation, cannot decrypt
Key rule: "Same key" = symmetric encryption. AES is the standard symmetric algorithm. RSA = asymmetric. SHA = hashing (not encryption).
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