The MinIO server runs a key-derivation algorithm to generate the KEK using a pseudo-random function ([PRF](#prf)):
`KEK := PRF(EK, IV, context_values)` where:

- [EK](#ek): is the external key. In case of SSE-C this is the client-provided key. In case of SSE-S3  this is secret key generated by the KMS. For further details see [SSE-C](#Server-Side-Encryption-with-client-provided-Keys) or [SSE-S3](#Server-Side-Encryption-with-a-KMS).

- `aws:groups` - This is an array containing the group names, this value would point to group mappings for the user, use `jwt:groups` in case of OpenID connect and `ldap:groups` in case of AD/LDAP.

## Explore Further

        fmt.Println("Subroute:", GetSubroute(ctx))
        for {
            select {
            case <-ctx.Done():
                return nil
            case req, ok := <-in:
                if !ok {
                    break
                }           
                // Do something with payload
                out <- []byte("response")

## Overview

MinIO implements an S3 extension to perform multiple concurrent fan-out upload operations. A perfect use case scenario for performing fan-out operations of incoming TSB (Time Shift Buffer's). TSBs are a method of facilitating time-shifted playback of television signaling, and media content.

Using above tier, set up a lifecycle rule with transition:

```
 mc ilm add --expiry-days 365 --transition-days 45 --storage-class "AZURETIER" myminio/srcbucket
```

Note: In the case of S3, it is possible to create a tier from MinIO running in EC2 to S3 using AWS role attached to EC2 as credentials instead of accesskey/secretkey:

```

The main difference between various MinIO-KMS deployments is the KMS implementation. The following table helps you select the right option for your use case:

| KMS                                                                                          | Purpose                                                           |

  --env="MINIO_ROOT_PASSWORD_FILE=my_secret_key" \
  quay.io/minio/minio server /data
```

`MINIO_ROOT_USER_FILE` and `MINIO_ROOT_PASSWORD_FILE` also support custom absolute paths, in case Docker secrets are mounted to custom locations or other tools are used to mount secrets into the container. For example, HashiCorp Vault injects secrets to `/vault/secrets`. With the custom names above, set the environment variables to

          ]
        }
      }
    ]
  }
}
```

This output shows that a document has been created for the event in Elasticsearch.

Here we see that the document ID is the bucket and object name. In case `access` format was used, the document ID would be automatically generated by Elasticsearch.

## Publish MinIO events via Redis

When using Veeam Backup and Replication, you can use S3 compatible object storage such as MinIO as a capacity tier for backups.  This disaggregates storage for the Veeam infrastructure and allows you to retain control of your data. With the ease of use of setup and administration of MinIO, it allows a Veeam backup admin to easily deploy their own object store for capacity tiering.

## Prerequisites

minio server /mnt/data
```

### Using WebIdentiy API

On another terminal run `web-identity.go` a sample client application which obtains JWT id_tokens from an identity provider, in our case its Keycloak. Uses the returned id_token response to get new temporary credentials from the MinIO server using the STS API call `AssumeRoleWithWebIdentity`.

```