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Rotate a Key Encryption Key
Protect your customers by rotating the key encryption key (KEK) that’s used in the process of encrypting the data in your Marketing Cloud Engagement account. A KEK is an AES 256 cryptographic key that encrypts and decrypts other keys to provide those keys with an additional layer of protection. Work with your security and compliance teams to determine the appropriate rotation interval for your KEK. We recommend that you rotate the KEK at least one time per year. Repeat these steps at each rotation interval.

