Update Server-Side Encryption Type for Amazon S3 Objects
🔒 You can now change the server-side encryption type of encrypted objects in Amazon S3 without moving data. Use the UpdateObjectEncryption API to atomically change encryption keys across any object size or storage class, and run it at scale with S3 Batch Operations to standardize entire buckets while preserving object properties and Lifecycle eligibility. The capability supports migrating from SSE-S3 to SSE-KMS, swapping customer-managed KMS keys, and enabling S3 Bucket Keys to reduce KMS requests. The API is available in all AWS Regions via the AWS Management Console and SDKs.
