CmafEncryption 
    class CmafEncryption
A Common Media Application Format (CMAF) encryption configuration.
Types
Properties
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                  An optional 128-bit, 16-byte hex value represented by a 32-character string, used in conjunction with the key for encrypting blocks. If you don't specify a value, then MediaPackage creates the constant initialization vector (IV).
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                  The encryption method to use.
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                  Time (in seconds) between each encryption key rotation.
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                  A configuration for accessing an external Secure Packager and Encoder Key Exchange (SPEKE) service that will provide encryption keys.