Which encryption methodology is MOST effective to ensure data cannot be retrieved from a stolen device?

Which encryption methodology is MOST effective to ensure data cannot be retrieved from a stolen device?

• A. Encryption at rest
• B. Encryption in transit
• C. Federated encryption
• D. Public key encryption

Answer: (A)

Encryption at rest is the most effective methodology for ensuring that data cannot be retrieved from a stolen device because it specifically protects stored data by encrypting it when it is saved on a device. This means that even if a device is stolen, the data cannot be accessed without the appropriate decryption key or credentials, effectively rendering it useless to unauthorized users. This type of encryption secures data on storage devices such as hard drives, solid-state drives, and external storage media. When data is encrypted at rest, it is protected from being easily accessed and read, ensuring confidentiality and compliance with data protection standards. The other methodologies provided, such as encryption in transit, focus on protecting data as it is being transmitted over networks, which doesn't address the risk of someone accessing data stored on a stolen device. Federated encryption refers to a system that allows sharing and managing encryption keys across different domains, but it doesn't inherently prevent data access from theft. Public key encryption is a method for securing data through asymmetric keys but again does not specifically target the issue of data on a stolen device. Therefore, the most relevant and effective method for the scenario described is encryption at rest.

Encryption at rest is the most effective methodology for ensuring that data cannot be retrieved from a stolen device because it specifically protects stored data by encrypting it when it is saved on a device. This means that even if a device is stolen, the data cannot be accessed without the appropriate decryption key or credentials, effectively rendering it useless to unauthorized users.

This type of encryption secures data on storage devices such as hard drives, solid-state drives, and external storage media. When data is encrypted at rest, it is protected from being easily accessed and read, ensuring confidentiality and compliance with data protection standards.

The other methodologies provided, such as encryption in transit, focus on protecting data as it is being transmitted over networks, which doesn't address the risk of someone accessing data stored on a stolen device. Federated encryption refers to a system that allows sharing and managing encryption keys across different domains, but it doesn't inherently prevent data access from theft. Public key encryption is a method for securing data through asymmetric keys but again does not specifically target the issue of data on a stolen device. Therefore, the most relevant and effective method for the scenario described is encryption at rest.