What is the purpose of using encryption in data transmission?

The purpose of using encryption in data transmission primarily revolves around the need to protect data from unauthorized access. When data is transmitted over networks, it can potentially be intercepted by malicious entities. Encryption transforms this data into a coded format that can only be deciphered by someone with the correct decryption key. This ensures that even if an unauthorized individual intercepts the data during transmission, they cannot understand or make use of it without the decryption capabilities.

In contrast, authentication processes are concerned with verifying the identity of users or systems rather than the protection of data itself. Higher data speeds and reduced file sizes are not direct consequences or objectives of encryption. Encryption focuses on maintaining confidentiality and integrity of data to safeguard sensitive information during its journey across networks.