# BSI C5 CRY-01 — Policy for the use of encryption procedures and key management

- Source: https://support.icompaas.com/support/solutions/articles/a_gen_bsic5_cry01_2d95442701-bsi-c5-cry-01-policy-for-the-use-of-encryption-procedures-and-key-management
- Section: [Solutions](https://support.icompaas.com/support/solutions) › [BSI C5 (German Cloud)](https://support.icompaas.com/support/solutions/c_gen_bsi_c5) › [Cryptography & Key Management](https://support.icompaas.com/support/solutions/folders/f_gen_cgenbsic5_cryptographykeymanagement)
- Last updated: 2026-05-30
- Publisher: iCompaas, Inc. (https://www.icompaas.com)

BSI C5 · Control CRY-01 · Priority: high · Component: Cryptography & Key Management

### What this control covers

Documents encryption and key management policies per SP-01, specifying strong encryption, risk-based usage, and secure key lifecycle management. Aligns with data classification and legal requirements to protect cloud customer data confidentiality and integrity.

### Why it matters

Risk is the language an executive team understands; this control connects technical reality to board-level decisions and budget allocation.

### How to implement

#### AWS

Codify the policy intent as **SCPs, AWS Config conformance packs, and Security Hub standards** so the cloud enforces what the document says.

#### Azure

Codify in **Azure Policy initiatives** (built-in regulatory compliance for CIS, ISO 27001, SOC 2, HIPAA) and assign at management-group level.

#### 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.

#### On-premises

Maintain a policy library with a documented review cadence (annual minimum); store in your GRC tool with attestation tracking. Map each policy to controls so an audit pull cites the exact policy clause.

### Evidence to collect

-   `policy_document` — A signed, version-controlled policy stating leadership intent and the named owner.
-   `infra_scan` — See the iCompaas Evidence library for the canonical source for this evidence type.

Signed policy or standard documents the safeguard. Focus: Policy for the use of encryption procedures and key management.

### Quick checklist

-   Risk — Protection / Cloud Customer Data
-   Confidentiality — Protection / Cloud Customer Data
-   Protection — Protection / Cloud Customer Data
-   Data — Protection / Cloud Customer Data
-   Policy — Protection / Cloud Customer Data
-   Encryption — Protection / Cloud Customer Data

### Related articles on this site

-   [Ensure that encryption at rest is enabled for Amazon Athena query results stored in Amazon S3 in order to secure data and meet compliance requirements for data-at-rest encryption.](https://support.icompaas.com/support/solutions/articles/62000233406-ensure-that-encryption-at-rest-is-enabled-for-amazon-athena-query-results-stored-in-amazon-s3-in-orde)
-   [Ensure EFS protects sensitive data with encryption at rest](https://support.icompaas.com/support/solutions/articles/62000229566-ensure-efs-protects-sensitive-data-with-encryption-at-rest)
-   [Ensure SQL server's Transparent Data Encryption (TDE) protector is encrypted with Customer managed key](https://support.icompaas.com/support/solutions/articles/62000229872-ensure-sql-server-s-transparent-data-encryption-tde-protector-is-encrypted-with-customer-managed-ke)
-   [Ensure Amazon EFS Protects Sensitive Data with Encryption at Rest](https://support.icompaas.com/support/solutions/articles/62000233573-ensure-amazon-efs-protects-sensitive-data-with-encryption-at-rest)

## 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.