Encryption by itself guarantees that a system will remain available during a denial-of-service attack.

### Why this is right Encryption does not guarantee availability. A denial-of-service attack tries to prevent access to a system or service, which encryption alone cannot stop. ### The concept Confidentiality, integrity, and availability are distinct security goals. Encryption can protect data from unauthorized reading and can contribute to secure backup practices, but service continuity requires other protections. The lesson points to redundant encrypted backups as a way to support recovery after an attack, not as proof that encryption prevents all availability attacks. ### The other options - **True. Encryption by itself guarantees that a system will remain available during a denial-of-service attack.**: This confuses confidentiality protection with availability. Encryption does not ensure that users can reach a service. ### Terms - **Denial-of-service attack**: An attack that disrupts access to a system or service. - **Availability**: The property that data and systems can be accessed when needed. - **Redundant backup**: An additional copy of data that can support recovery if another copy is lost or damaged. ### Remember Encryption can protect data, but it does not by itself keep a service online.