Fundamentals of InfoSecintermediate
Select ALL statements that correctly describe hybrid encryption.
Answer
A symmetric key encrypts the data., The recipient's public key can encrypt or protect the symmetric key., The recipient uses the private key to recover the symmetric key.
Explanation
### Why this is right
- **A** is true: symmetric encryption protects the main data in the hybrid workflow.
- **B** is true: public-key encryption protects the temporary symmetric key for the recipient.
- **C** is true: the recipient's private key recovers that symmetric key.
### The concept
Hybrid encryption combines methods to use each where it fits. Public-key cryptography protects the small key; symmetric encryption handles the data. The recipient then uses the recovered symmetric key to decrypt the data.
### The other options
- **D. The public-key operation replaces symmetric encryption for all data**: hybrid encryption retains symmetric encryption for the data; it does not replace it.
### Remember
Public-key method protects the symmetric key; symmetric method protects the message.
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