Start learning →

SYMMETRIC encryption uses

Atwo different keys: public for encrypt, private for decrypt
Bno keys (steganography)
Cthe SAME secret key for both encryption and decryption
Dbiometric data only
Answer & Solution
Correct answer: C. the SAME secret key for both encryption and decryption
1. SYMMETRIC encryption: a single shared secret key encrypts and decrypts. 2. Examples: AES, DES, 3DES, ChaCha20. 3. ADVANTAGE: very fast — used for bulk data encryption (file storage, disk encryption, TLS data channel). 4. DISADVANTAGE: key distribution — how do two parties agree on the secret without a pre-existing secure channel? 5. Option A is asymmetric. Options B, D are not encryption types. _Source: Boneh & Shoup, "A Graduate Course in Applied Cryptography", §2 (Symmetric encryption)._
Practise this question with Quill — B.Tech Cyber Security →

Keep practising Cryptography

Browse all Cryptography questions for B.Tech Cyber Security, or explore more Cybersecurity topics.

Start a Cryptography lesson →
Related questions
Cryptography bingoSpot the false claimComplete the cryptography factsTrue or false about cryptographyWhich security serviceOrder signing and verifyingMatch the cryptographic termWhich key does it use