Cloud Identity 2sv Enforcement Session Policy

What the recommended Cloud Identity configuration is

This configuration establishes a secure, automated 2-Step Verification (2SV) rollout lifecycle using Cloud Identity enforcement groups, administrative enrollment grace periods, and session lifetime controls for Google Cloud services.

How it meets all requirements

• Preventing user onboarding lockouts: Enabling a new user enrollment grace period in Cloud Identity allows newly provisioned identities a configurable time window (e.g., from 1 day to several weeks) to log in and register their phishing-resistant security keys before strict 2SV enforcement blocks their account access.
• Preventing self-removal from enforcement groups: Setting the whoCanLeaveGroup attribute to NONE_CAN_LEAVE via the Groups Settings API enforces mandatory access control, preventing users from opting out of the security enforcement group.
• Mitigating persistent session token risk: Applying a 16-hour session reauthentication policy specifically for Google Cloud services revokes long-lived developer workstation OAuth tokens and mandates security key re-verification at regular intervals.

Key advantages and capabilities

• Phishing resistance: Mandates FIDO-compliant hardware tokens (such as Titan Security Keys) across administrative personnel.
• Mandatory access governance: Ensures security policies applied through enforcement groups cannot be altered or bypassed by end users.
• Seamless onboarding: Eliminates administrative overhead and help desk tickets caused by immediate day-one account lockouts.
• Credential hygiene: Restricts the attack window of stolen developer credentials or compromised workstation tokens by enforcing continuous session refresh limits.

Why this is optimal

This approach directly leverages Cloud Identity's built-in authentication lifecycle settings and Google Cloud session management best practices without relying on brittle custom scripts or insecure administrative exceptions.