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ITSP.10.17198
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03.05.01User identification, authentication, and re-authenticationITSP.10.171Identification and authentication

Official Requirement

A. Uniquely identify and authenticate system users and associate that unique identification with processes acting on behalf of those users. B. Re-authenticate users when [Assignment: organization-defined circumstances or situations requiring re-authentication].

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

In Plain English

Every user must have a unique identity (no shared accounts for individual access) and must authenticate before accessing any system. The system must also require re-authentication in specific situations, such as after inactivity, before accessing sensitive resources, or when session conditions change.

Cross-framework mappings:ISO 42001 · coming soonISO 27001 · coming soon
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Updated: Mar 22, 2026Reviewed: Mar 22, 2026v1.0.0
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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

Unique user identification and authentication

Implementation steps

  1. Assign unique user accounts in Active Directory for all personnel; prohibit shared accounts for individual use
  2. Enforce domain authentication for all workstation and server access
  3. Configure re-authentication requirements for sensitive systems (e.g., require password re-entry for privileged applications)
  4. Audit for shared accounts periodically and remediate any findings

Tools / systems

Evidence artifacts

Evidence frequency: Continuous enforcement; quarterly account audit