SteelBox security begins at the device level.
The SteelBox servers are hosted in a multi-tenant Microsoft Azure Government Cloud, FedRAMP High, Impact Level 4 environment. The secure servers act as "traffic cops" to route incoming calls and messages to and from end-user smartphones and provides encryption for Controlled Unclassified Information (CUI).
The SteelBox app will not run on rooted or jailbroken mobile devices. Once the secure activation process has been performed, SteelBox leverages the National Security Agency’s (NSA’s) Commercial National Security Algorithm (CNSA) encryption standard to ensure that each call and message is encrypted with unique AES-256, P-384 elliptic-curve crypto keys.