Developing Solutions for Microsoft Azure (AZ-204) Practice Exam

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What type of encryption does Azure App Configuration use for data at rest?

128-bit AES
256-bit AES
64-bit AES
Blowfish encryption

The correct answer is: 256-bit AES

Azure App Configuration uses 256-bit AES encryption for data at rest, which ensures a high level of security for the stored data. AES, which stands for Advanced Encryption Standard, is a widely trusted symmetric encryption algorithm recognized for its strength and efficiency. The 256-bit key length means that there are an enormous number of possible keys, making it highly resistant to brute-force attacks. This level of encryption is in line with many compliance requirements and provides a robust method for protecting sensitive configuration data against unauthorized access. In contrast, the other types of encryption mentioned do not provide the same level of security. For instance, 128-bit AES, while still strong, offers a lower key length compared to 256-bit, making it less secure for scenarios that require stringent protection. Similarly, 64-bit AES and Blowfish encryption do not match the security strength of the 256-bit AES standard used by Azure App Configuration. This makes 256-bit AES the preferred choice for ensuring data integrity and confidentiality in the Azure cloud environment.