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An organization is implementing data encryption using symmetric ciphers and the Chief Information Officer (CIO) is concerned about the risk of using one key to protect all sensitive data, The security practitioner has been tasked with recommending a solution to address the CIO's concerns, Which of the following is the BEST approach to achieving the objective by encrypting all sensitive data?
Correct Answer: B
One good way is by using a key hierarchy. This is simply a way to organize encryption keys so that a root (or master) key is used to encrypt other keys that are in turn used to encrypt the actual data you want to protect. A key hierarchy provides a powerful pattern for storing an application's cryptographic keys. It also allows you to use different keys for different data while allowing you to focus your protection efforts on the master key.