Exam AWS Certified Security - Specialty topic 1 question 488 discussion

A. The application does not have the kms:Encrypt permission for the customer managed key: To use a customer managed key for encryption and decryption of secure string parameters in AWS Systems Manager Parameter Store, the application needs to have the necessary permissions. Specifically, it requires the kms:Encrypt permission for the customer managed key used for encryption. If the application lacks this permission, it will result in error messages when attempting to update the parameter. D. The customer managed key that is specified in the application has its key state set to Disabled: If the customer managed key specified in the application has its key state set to Disabled, it means that the key is not active and cannot be used for encryption or decryption operations. In this case, when the application tries to update the secure string parameter using the disabled key, it will result in error messages.

A. The application does not have the kms:Encrypt permission for the customer managed key. If the application does not have the necessary kms:Encrypt permission for the customer managed key, it won't be able to encrypt the parameter value before storing it. B. The customer managed key is already being used to encrypt another secure string parameter. AWS KMS customer managed keys can be used to encrypt multiple resources, but each key has limitations on how much data it can encrypt. If the key is already used to encrypt other parameters or resources and its limit has been reached, you might encounter issues while trying to use it for encryption again.