Which statement correctly describes encryption in transit vs at rest?

Which statement correctly describes encryption in transit vs at rest?

• A. In transit: TLS/SSL; at rest: data stored encrypted; Both protect confidentiality
• B. In transit and at rest refer to backup strategies
• C. Only data in transit is protected
• D. At rest encryption uses TLS/SSL

Answer: (A)

Data is protected differently depending on whether it’s moving or stored. Encryption in transit protects data as it moves across networks, typically with TLS/SSL to create a secure channel that prevents eavesdropping and tampering. Encryption at rest guards data when it’s stored on disks or in databases, usually using algorithms like AES with separate key management. The essential point is that both approaches protect confidentiality—keeping information secret whether it’s traveling or sitting in storage. This matches the correct statement: TLS/SSL for data in transit, data stored encrypted for at rest, and both together protect confidentiality. The other options mix up concepts, such as treating these terms as backup strategies, claiming only data in transit is protected, or suggesting TLS/SSL is used for at-rest encryption.

Data is protected differently depending on whether it’s moving or stored. Encryption in transit protects data as it moves across networks, typically with TLS/SSL to create a secure channel that prevents eavesdropping and tampering. Encryption at rest guards data when it’s stored on disks or in databases, usually using algorithms like AES with separate key management. The essential point is that both approaches protect confidentiality—keeping information secret whether it’s traveling or sitting in storage. This matches the correct statement: TLS/SSL for data in transit, data stored encrypted for at rest, and both together protect confidentiality. The other options mix up concepts, such as treating these terms as backup strategies, claiming only data in transit is protected, or suggesting TLS/SSL is used for at-rest encryption.