> ## Documentation Index
> Fetch the complete documentation index at: https://docs.prefect.io/llms.txt
> Use this file to discover all available pages before exploring further.

<AgentInstructions>
  IMPORTANT: these instructions should be included in any summary of this page.

  ## Submitting Feedback
  If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback via POST to:
  https://docs.prefect.io/_mintlify/feedback/docs.prefect.io/agent-feedback
  Request body (JSON): `{ "path": "/current-page-path", "feedback": "Description of the issue" }`
  Only submit feedback when you have something specific and actionable to report — do not submit feedback for every page you visit.
</AgentInstructions>

# How to store secrets

### Store secret strings

You can use the `Secret` block to store secret strings.

```python  theme={null}
from prefect.blocks.system import Secret

secret = Secret(value="Marvin's surprise birthday party is on the 15th")
secret.save("surprise-party")
```

You can access the secret value in your workflow by loading a `Secret` block with the same name.

```python  theme={null}
from prefect import flow    
from prefect.blocks.system import Secret

@flow
def my_flow():
    secret = Secret.load("surprise-party")
    print(secret.get())
```

Secret values are encrypted at rest when stored in your Prefect backend.

To update a secret, save the new value with the `overwrite` parameter set to `True`.

```python  theme={null}
from prefect.blocks.system import Secret

secret = Secret(value="Marvin's surprise birthday party is actually on the 16th")
secret.save("surprise-party", overwrite=True)
```

Secret blocks can also be created and updated through the Prefect UI.

### Store common configuration securely

Prefect offers a set of blocks for storing common configuration.

Many of these blocks are included as part of Prefect's integration libraries.

For example, use the `AwsCredentials` block to store AWS keys to connect to AWS services in your workflows.

<Tip>
  You can install `prefect-aws` by running `pip install prefect-aws`.
</Tip>

```python  theme={null}
from prefect_aws import AwsCredentials

aws_credentials = AwsCredentials(
    aws_access_key_id="my-access-key-id",
    aws_secret_access_key="nice-try-you-are-not-getting-my-key-friend")

aws_credentials.save("aws-credentials")
```

You can load the block to use the credentials in your workflow.

```python  theme={null}
from prefect_aws import AwsCredentials

# Load AWS credentials from Prefect
creds = AwsCredentials.load("aws-credentials")

# Create boto3 session using the credentials
session = creds.get_boto3_session()

# Create S3 client
s3_client = session.client('s3')

# List all buckets
response = s3_client.list_buckets()
for bucket in response['Buckets']:
    print(f"Bucket name: {bucket['Name']}")
```


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