The process of transforming plain text or data into cipher text that cannot be read by anyone other than the sender and the intended receiver is called _________________.

✅ The correct answer is option C.
The process of transforming plain text or data into cipher text that cannot be read by anyone other than the sender and the intended receiver is called Encryption. Encryption is a way of scrambling data so that only authorized parties can understand the information. In technical terms, it is the process of converting plaintext to ciphertext. In simpler terms, encryption takes readable data and alters it so that it appears random.