How is confidentiality typically achieved in a data protocol environment?

• A. Through encryption (e.g., TLS, end-to-end encryption) to prevent eavesdropping.
• B. By compressing data.
• C. By increasing message size.
• D. By masking IP addresses only.

Answer: (C)

Confidentiality in a data protocol environment is achieved by encryption, which turns readable data into unreadable ciphertext that can only be decrypted by someone with the proper key. Protocols like TLS protect data in transit between parties, so interceptors can’t read the content, and end-to-end encryption ensures only the communicating endpoints can decrypt the payload, even if intermediaries handle the data.

Compression is about reducing size, not hiding content. Increasing message size doesn't secure content, and masking IP addresses addresses only metadata visibility, not the actual message payload.