Is the Knox platform certified by the US government?

Yes. Knox 3.x currently has five US government certifications:

1. FIPS 140-2: Issued by the National Institute of Standards and Technology (NIST), the Federal Information Processing Standard (FIPS) is a US security standard that helps ensure companies that collect, store, transfer, share, and disseminate sensitive but unclassified (SBU) information and controlled unclassified information (CUI) can make informed purchasing decisions when choosing devices to use in their workplace. Samsung Knox meets the requirements for FIPS 140-2 Level 1 certification for both data-at-rest (DAR) and data-in-transit (DIT).
    
2. DISA Approved STIG: The Defense Information Systems Agency (DISA) is an agency within the US DoD that publishes Security Technical Implementation Guides (STIGs) which document security policies, requirements, and implementation details for compliance with DoD policy.
   
   

3. DISA ApprovedProduct List: DISA has approved select Knox-enabled devices to the US DoD Approved Products List (APL).  

   Note: Select Samsung Knox-enabled devices and tablets are certified under the National Information Assurance Partnership (NIAP) Common Criteria (CC) Mobile Device Fundamental Protection Profile (MDFPP).  

4. Common Criteria Certification: The Common Criteria for Information Technology Security Evaluation, commonly referred to as Common Criteria, is an internationally-recognized standard for defining security objectives of information technology products and for evaluating vendor compliance with these objectives. A number of Governments use Common Criteria as the basis for their own certification schemes.  
   
   Select Galaxy devices with Knox embedded received Common Criteria (CC) certification. The current CC certification targets the new Mobile Device Fundamentals Protection Profile (MDFPP) of the National Information Assurance Partnership (NIAP), which addresses the security requirements of mobile devices for use in enterprise. Samsung Knox is approved by the United States government as the first NIAP-validated consumer mobile devices to handle the full range of classified information. 
    
5. CSfC: Fifteen Samsung devices have been listed in the NSA/CSS's Commercial Solutions for Classified Program (CSfC) for approved security components.