Amazon Kendra encrypts the contents of your index using one of three types of keys. You can choose one of the following:
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An AWS-owned AWS KMS. This is the default.
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An AWS-managed KMS key. This key is created in your account and is managed and used on your behalf by Amazon Kendra.
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A customer-managed KMS key. You can create the key when you are creating an Amazon Kendra index or data source, or you can create the key using the AWS KMS console. Select a symmetric encryption customer-managed KMS key. Amazon Kendra does not support asymmetric KMS keys. For more information, see Using Symmetric and Asymmetric Keys in the AWS Key Management Service Developer Guide.