Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

How should a private key be securely stored according to best practices?

1. In plain text within the code

2. In a file accessible to all users

3. In a "Key Container"

4. In a public Git repository

The correct answer is: In a "Key Container"

Storing a private key in a "Key Container" is considered a best practice because it provides a controlled environment designed to securely manage cryptographic keys. A Key Container can employ various security measures, such as access controls and encryption, to protect the key from unauthorized access. This method ensures that the private key is not easily accessible or exposed in an insecure manner, making it significantly harder for malicious actors to obtain it. In contrast, storing a private key in plain text within the code or in an easily accessible file would expose it to anyone who has access to the source code or the file system. Similarly, placing it in a public Git repository would allow anyone to see and use the key, negating the confidentiality it is supposed to maintain. Therefore, using a Key Container aligns with security best practices, protecting sensitive information while allowing for the necessary operational functionality in applications.