
Archived App
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
This secure communication service offers end-to-end encrypted voice calls and instant messages for government customers. It protects against eavesdropping and ensures excellent voice quality for sensitive data transmission. The app is independently validated and certified for secure mobile communications.
What's New in SteelBox
5.0.134
April 6, 2023
- Retract Messages - Minor enhancements and bug fixes
FAQ
What is SteelBox?
SteelBox is a secure communication solution offering end-to-end encryption for voice calls and instant messages. It is designed for government customers to protect sensitive data from eavesdropping and ensure high-quality communication.
How do I use SteelBox?
To use SteelBox, you must acquire a valid license directly from CACI International Inc. The app then provides secure voice and message communication features.
What kind of data can be secured with SteelBox?
SteelBox is certified for the communication of official Secret/Classified/Restricted/Confidential data. It supports voice and instant messaging, including shared content like documents, images, and videos.
Does SteelBox support group communication?
Yes, SteelBox supports secure group voice calls. You can join an existing group or create a new one for immediate communication needs.
What encryption standards does SteelBox comply with?
SteelBox supports dual layers of encryption and complies with Commercial National Security Algorithm Suite cryptography requirements and FIPS 140-2 (NIST). It is also Common Criteria certified and NIAP Protection Profile compliant.
Can SteelBox integrate with existing phone systems?
Yes, SteelBox can connect to customer PBX, conferencing servers, and PSTN. This allows for extended functionalities such as breakout calling, break-in calling, and conferencing.
What devices is SteelBox available on?
SteelBox is available for iPhone and iPod devices. It is designed for mobile use on these platforms.
How often is SteelBox updated?
The latest version of SteelBox is 5.0.134, which was last updated on April 6, 2023. Updates ensure the app remains secure and functional.



