This page is only for existing customers of the S3 Glacier service using Vaults and the original REST API from 2012.
If you're looking for archival storage solutions we suggest using the S3 Glacier storage classes in Amazon S3, S3 Glacier Instant Retrieval, S3 Glacier Flexible Retrieval, and S3 Glacier Deep Archive. To learn more about these storage options, see S3 Glacier storage classes
Key Management
Server-side encryption addresses data encryption at rest—that is, Amazon S3 Glacier encrypts your data as it writes it to its data centers and decrypts it for you when you access it. As long as you authenticate your request and you have access permissions, there is no difference in the way you access encrypted or unencrypted data.
Data at rest stored in S3 Glacier is automatically server-side encrypted using AES-256, using keys maintained by Amazon. As an additional safeguard, Amazon encrypts the key itself with a root key that we regularly rotate.