Fundamentals of InfoSecintermediate
Which statement best explains why hybrid encryption is used?
Answer
It uses public-key cryptography for a symmetric key and symmetric encryption for the data.
Explanation
### Why this is right
Hybrid encryption divides the work: public-key methods protect a temporary symmetric key, while symmetric encryption protects the larger data. This uses the efficiency of symmetric encryption while making it easier to protect a key for a recipient.
### The other options
- **B. It uses a single public key to encrypt all data and avoids any symmetric key**: that is not the described hybrid design.
- **C. It uses a hash to reverse the ciphertext into plaintext**: hashes are one-way and are not decryption methods.
- **D. It makes the recipient's private key publicly available**: the private key must remain protected.
### Remember
Hybrid encryption combines key protection with efficient data encryption.
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