Previously, Amazon Transcribe encrypted custom linguistic resources using AWS-owned keys. The update enables users to supply their own AWS Key Management Service (KMS) symmetric encryption keys when creating or updating custom vocabularies, filters, or language models, giving customers full access control over encryption permissions.
Customer-managed keys allow precise control over who can encrypt or decrypt resources, with every key usage logged via AWS CloudTrail for auditing. Keys can be disabled or rotated on the user’s schedule, providing enhanced compliance capabilities. This feature is supported in all AWS Regions where Amazon Transcribe is offered.
Source & further reading
Amazon Transcribe adds customer-managed KMS keys for custom resources ↗Source published 2026-09-25. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.