In symmetric encryption, the same shared key is used to encrypt and decrypt the data.
Answer
true
Explanation
### Why this is right
The statement matches the lesson’s definition of symmetric encryption: one shared key is used for both operations.
### The concept
A sender encrypts plaintext using the shared secret key, producing ciphertext. The recipient must have the same key to decrypt the ciphertext back into readable data. Since both parties need the same secret, protecting and sharing that key is part of using the method. This differs from asymmetric encryption, which uses a public and private key pair.
### The other options
- **False**: This would contradict the definition of symmetric encryption and describe a different key arrangement.
### Terms
- **Symmetric encryption**: A method that uses the same key for encryption and decryption.
- **Plaintext**: Readable data before encryption.
- **Ciphertext**: Data after encryption.
### Remember
Symmetric means the same shared key performs both directions.
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