If you're new to archival storage in Amazon Simple Storage Service (Amazon S3), we recommend that you start by
learning more about the S3 Glacier storage classes in Amazon S3, S3 Glacier Instant Retrieval, S3 Glacier Flexible Retrieval, and S3 Glacier Deep Archive. For more information, see S3 Glacier storage classes
Internetwork Traffic Privacy
Access to Amazon S3 Glacier via the network is through AWS published APIs. Clients must support Transport Layer Security (TLS) 1.2. We recommend TLS 1.3 or later. Clients must also support cipher suites with Perfect Forward Secrecy (PFS), such as Ephemeral Diffie-Hellman (DHE) or Elliptic Curve Diffie-Hellman Ephemeral (ECDHE). Most modern systems such as Java 7 and later support these modes. Additionally, you must sign requests using an access key ID and a secret access key that are associated with an IAM principal, or you can use the AWS Security Token Service (AWS STS) to generate temporary security credentials to sign requests.
VPC Endpoints
A virtual private cloud (VPC) endpoint enables you to privately connect your VPC to supported AWS services and VPC endpoint services powered by AWS PrivateLink without requiring an internet gateway, NAT device, VPN connection, or AWS Direct Connect connection. Although S3 Glacier does not support VPC endpoints directly, you can take advantage of Amazon Simple Storage Service (Amazon S3) VPC endpoints if you access S3 Glacier as a storage tier integrated with Amazon S3.
For more information about Amazon S3 lifecycle configuration and transitioning objects to the S3 Glacier storage class, see Object Lifecycle Management and Transitioning Objects in the Amazon Simple Storage Service User Guide. For more information about VPC endpoints, see VPC Endpoints in the Amazon VPC User Guide.
