Which method is used to ensure that data transmission over the network is secure?

Data encryption is the method used to ensure that data transmission over the network is secure. This process involves converting the data into a coded format that can only be read or decrypted by those who possess the correct key or password. By encrypting data before it is transmitted, even if the data is intercepted, it remains unintelligible to unauthorized users, effectively protecting the confidentiality and integrity of the information being communicated.

When data is encrypted, it ensures that sensitive information, such as financial details or personal identification data, cannot be easily accessed or tampered with during transmission. This is particularly important in environments where data is sent over potentially insecure networks, such as the internet.

In contrast, data obfuscation involves making data difficult to understand without necessarily encrypting it, which may not provide the same level of security as encryption. Data masking can conceal specific data values for privacy but does not offer protection during transmission. Data compression reduces the size of the data for efficient transmission without addressing security concerns. Therefore, encryption is the most effective method for securing data during transmission over a network.