Question

What is the minimum number of cryptographic keys required for secure two-way communications in symmetric key cryptography?

A. Three
B. Two
C. One
D. Four

Answer 1

In symmetric key cryptography, a single cryptographic key is shared between the two parties to encrypt and decrypt messages, thus only one key is needed for secure two-way communication.

Step-by-step explanation:

The minimum number of cryptographic keys required for secure two-way communications in symmetric key cryptography is C. One. In symmetric key cryptography, the same key is used to encrypt and decrypt messages. This means that both parties in the communication use the same secret key for both sending and receiving messages securely.