FedRAMP High Baseline sets the most stringent security requirements among all FedRAMP levels. It is the standard for systems handling the most sensitive government data—data whose compromise could have severe or catastrophic impact. Achieving it demands a sharp approach to access control: no guessing, no loose ends, no unnecessary privileges.
Restricted access under FedRAMP High Baseline is not optional—it is the foundation. The framework requires agencies and vendors to enforce strict role-based access control, apply least-privilege policies, and maintain continuous monitoring of all authentication events. Accounts must be traceable to individuals. Temporary or shared credentials are prohibited. Multi-factor authentication (MFA) is mandatory for all users, including privileged administrators, with cryptographic methods that meet NIST guidelines.
Segmentation is another critical component. Network and system boundaries must isolate sensitive workloads from those with lower classification. Access paths between these zones must be controlled and logged. Unauthorized lateral movement is treated as an incident, even if no data breach is detected.