How does Airflow handle secrets management?

Airflow supports a pluggable Secrets Backend to retrieve Connections and Variables from external secret stores rather than the metadata DB. Supported backends include AWS Secrets Manager, HashiCorp Vault, GCP Secret Manager, and Azure Key Vault. Configure via secrets.backend in airflow.cfg. Example:

[secrets]
backend = airflow.providers.amazon.aws.secrets.secrets_manager.SecretsManagerBackend
backend_kwargs = {"connections_prefix": "airflow/connections", "variables_prefix": "airflow/variables"}

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