**Why Secret Scopes**: Credentials in notebooks or config get committed or logged. Secret Scopes provide a namespace for secrets, accessed via dbutils.secrets.get(scope="my-scope", key="api-key"). Never log the return value. **Types**: Databricks-backed (stored in Databricks) and Key Vault-backed (Azure) or AWS Secrets Manager-backed—enterprise secrets stay in your vault. **Scalability**: Many secrets across many clusters—use ACLs to restrict scope access per group....
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