Answer the following statements true (T) or false (F)

1. Symmetric encryption is also referred to as secret-key or single-key encryption.
2. Plaintext is the scrambled message produced as output.
3. If both sender and receiver use the same key the system is referred to as asymmetric.
4. The ciphertext-only attack is the easiest to defend against.
5. A brute-force approach involves trying every possible key until an intelligible translation of the ciphertext into plaintext is obtained.

1. True
2. False
3. False
4. True
5. True