{"id":"backup-cross-account-aws-managed-key-not-supported","text":"Cross-account AWS Backup copies require customer managed KMS keys for resources not fully managed by AWS Backup — AWS managed keys cannot be used because their key policies are immutable and cannot be shared.","truth_value":"IN","source":"entries/2026/03/12/aws-backup-latest-devguide-encryptionhtml.md","source_url":"","source_hash":"993244b621161c16","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"backup-cross-account-aws-managed-key-not-supported","truth_value":"IN","reason":"premise"}]}}