Phase One Implementation Brief

ZERO TRUST PORTFOLIO MANAGEMENT OFFICE · INTERNAL MEMORANDUM

1. Purpose

This memorandum summarizes Component progress against Phase One of the Zero Trust Implementation Guideline (ZIG) and directs enforcement priorities for the next two quarters. Phase One organizes a subset of the 152 Activities in the DoW ZT Strategy toward Target-level maturity under the principles of never trust, always verify and assume breach.

2. Situation

Continuous authentication and authorization of every user, device, and application is now enforced at the Policy Decision Point for all portal-delivered resources. Legacy perimeter dependencies remain in two Component enclaves and are scheduled for micro-segmentation under Activity 5.4.1.

3. Enforcement Gaps (Synthetic)

4. Direction

• Extend the enforcement point to the browser session itself: copy, paste, download, upload, print, and screen capture of controlled content are policy decisions, not defaults.
• Complete deny-by-default policy for users (1.7.1) and devices (2.4.1) across all Component enclaves.
• Data governance cell to deliver tagging standards (4.2.1) so labeling tools (4.3.1) can enforce handling at the point of use.
• All access decisions logged and parsed (7.1.2) into the SIEM for continuous visibility.

5. Coordination

Components report Phase One status through the Mission Portal activity tracker no later than the 5th of each month. Questions route to the ZT PfMO watch cell.