# BSI C5 OPS-09 — Data Backup and Recovery - Storage

- Source: https://support.icompaas.com/support/solutions/articles/a_gen_bsic5_ops09_55951372fe-bsi-c5-ops-09-data-backup-and-recovery-storage
- Section: [Solutions](https://support.icompaas.com/support/solutions) › [BSI C5 (German Cloud)](https://support.icompaas.com/support/solutions/c_gen_bsi_c5) › [Operations Security](https://support.icompaas.com/support/solutions/folders/f_gen_cgenbsic5_operationssecurity)
- Last updated: 2026-05-30
- Publisher: iCompaas, Inc. (https://www.icompaas.com)

BSI C5 · Control OPS-09 · Priority: critical · Component: Operations Security

### What this control covers

Transfers encrypted backups to secure remote locations with equivalent security measures as main sites. Ensures sufficient distance to meet recovery times, protecting cloud customer data from site-specific disasters and ensuring availability.

### Why it matters

Encryption and key management make data unreadable to attackers and unintelligible under data-breach safe-harbour clauses — a meaningful regulatory benefit.

### How to implement

#### AWS

Default to **SSE-KMS** with customer-managed keys for S3/EBS/RDS/Secrets Manager. Use **S3 Bucket Keys** and **S3 Block Public Access** at the account level, and turn on **S3 Object Lock** on backup buckets for ransomware resilience.

#### Azure

Store secrets in **Key Vault** (HSM-backed where required) with soft-delete + purge protection; use **customer-managed keys** for Storage, SQL, and Azure Disk Encryption. Tag PII data via **Microsoft Purview**.

#### GCP

Use **Cloud KMS** with customer-managed encryption keys (CMEK) for BigQuery, GCS, and Compute. **Sensitive Data Protection** (DLP API) inspects/de-identifies PII at scale.

#### Google Workspace

Enable **client-side encryption** for Drive/Docs and turn on **Drive Labels + DLP** rules to prevent external sharing of regulated data classes.

### Evidence to collect

-   `infra_scan` — See the iCompaas Evidence library for the canonical source for this evidence type.

Infrastructure posture tooling (AWS Config, Azure Policy, Nessus) verifies platform hardening. Focus: Data Backup and Recovery - Storage.

### Quick checklist

-   Security — Measures / Protection
-   Protection — Measures / Protection
-   Data — Measures / Protection
-   Data Backup — Measures / Protection
-   Secure — Measures / Protection
-   Business — Measures / Protection

### Related articles on this site

-   [Ensure Backup Data in Recovery Services Vaults Is Encrypted Using Customer-Managed Keys (CMK)](https://support.icompaas.com/support/solutions/articles/62000234845-ensure-backup-data-in-recovery-services-vaults-is-encrypted-using-customer-managed-keys-cmk-)
-   [Ensure storage for critical data are encrypted with Customer Managed Key](https://support.icompaas.com/support/solutions/articles/62000219790-ensure-storage-for-critical-data-are-encrypted-with-customer-managed-key)
-   [Ensure Amazon WorkSpaces storage volumes are encrypted in order to meet security and compliance requirements](https://support.icompaas.com/support/solutions/articles/62000229590-ensure-amazon-workspaces-storage-volumes-are-encrypted-in-order-to-meet-security-and-compliance-requi)
-   [Ensure that your Amazon WorkSpaces storage volumes are encrypted in order to meet security and compliance requirements.](https://support.icompaas.com/support/solutions/articles/62000233619-ensure-that-your-amazon-workspaces-storage-volumes-are-encrypted-in-order-to-meet-security-and-compli)

## Related compliance guidance

- [SOC 2 compliance: a practical implementation guide for cloud-native SaaS teams](https://support.icompaas.com/compliance/soc-2-trust-services-criteria): Configuration checks like this one are the technical half of a SOC 2 / ISO 27001 programme — the guide shows where they fit, what else an auditor expects, and how to evidence them.
- [ISO/IEC 27001:2022 compliance: a practical implementation guide](https://support.icompaas.com/compliance/iso-27001-2022): ISO 27001 Annex A.8 (technological controls) is where cloud hardening evidence lands; the guide shows how to run the ISMS around it.