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ITSP.10.17198
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98 controls

03.08.09System backup - cryptographic protectionITSP.10.171Media protection

Official Requirement

A. Protect the confidentiality of backup information. B. Implement cryptographic mechanisms to prevent the unauthorized disclosure of specified information at backup storage locations.

Source: Canadian Centre for Cyber Security ITSP.10.171 (2025), adapted from NIST SP 800-171 Rev. 3

In Plain English

All backup data containing sensitive information must be encrypted to protect its confidentiality. Whether backups are stored on-site, off-site, or in the cloud, cryptographic mechanisms must prevent unauthorized access to the backup contents.

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The Trust Services Criteria referenced in this tool are published by the American Institute of Certified Public Accountants (AICPA) and incorporate principles from the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Criteria descriptions are reproduced for reference purposes. All implementation guidance, evidence recommendations, and control language are original work by Truvo Cyber. ISO 27001 and ISO 42001 are standards published by the International Organization for Standardization (ISO). Framework and standard names are the property of their respective owners. This tool is not affiliated with, endorsed by, or certified by AICPA, COSO, or ISO.

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On-premises implementation and evidence

Backup encryption and confidentiality protection

Implementation steps

  1. Configure backup software to encrypt all backups using AES-256 or equivalent cryptographic algorithms before writing to storage
  2. Encrypt backup media (tapes, external drives) using hardware or software encryption mechanisms
  3. Store encryption keys separately from backup media in a secure key management system or hardware security module
  4. Test backup restoration quarterly to verify that encrypted backups remain recoverable and keys are accessible

Tools / systems

Evidence artifacts

Evidence frequency: Continuous encryption enforcement; quarterly backup restoration tests; annual key rotation