About this app

** For Testing Purposes Only with Pre-Approval Required **

End-to-End Encryption with Post-Quantum Protection for Secure Voice, Video, Messaging, and File Transfers Protecting Sensitive to Highly Classified
Government Communications Worldwide.

Secure Instant Messaging

Need to send a large file (500MB+) securely? No Problem.

CSG delivers military-grade encryption for private messaging, facilitating the seamless and secure exchange of files and ideas.

Share photos, videos, voice notes and files effortlessly. Each message and file you send is safeguarded by a unique encryption key, providing unparalleled end-to-end security.

CSG enhances your collaborative efforts by allowing the creation of group chats for private messaging and file sharing directly within the app. These features boost productivity and foster secure, efficient communication within your enterprise.

Secure Voice and Video Calls

Calls are safeguarded with end-to-end encryption and signal obfuscation, providing the highest level of security through your mobile device's data connection.

But it's not just about securing your calls; it's about enhancing your communication experience. CSG''s cutting-edge phone call encryption codecs ensure high-definition call quality, optimizing data and battery usage even across the most austere, low-bandwidth, mobile / wireless networks.

CSG supports secure calling over an extensive range of IP-based networks, including Wi-Fi, 5G, 4G/LTE, 3G/HSDPA, and satellite networks. Mutual authentication of all call participants eliminates any potential risks associated with Caller ID spoofing and Man in The Middle (MITM) attacks.

Secure Conference Calls

A conference bridge can be established instantly by creating a group of contacts and hitting the call button. With only mutually authenticated, authorized users, CSG conference calls eliminate the need for participant PINs and passwords.

Work Anywhere, on Any Device

CSG can be downloaded instantly for immediate use with no additional hardware dependencies.

End-to-End Encryption

CSG uses double-layer encryption in an end-to-end configuration, with a new key for every call and message. The system is modular and adheres to best practice cryptographic standards/protocols, powered by a robust crypto core. With CSG, data is secured end-to-end using advanced Elliptic Curve and Symmetric-Key Cryptography.

For post-quantum protection, the underlying cryptography is overlaid with state-of-the-art Post-Quantum Cryptography algorithms for voice, video, messaging, and file transfers.

International Security Standards
CSG is designed to meet the highest international security standards and is trusted by governments worldwide for protecting their most sensitive communications.
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App Permissions

Allows applications to access information about networks.
Allows applications to access information about Wi-Fi networks.
Allows an application to broadcast sticky intents.
Allows applications to open network sockets.
Allows an application to modify global audio settings.
Allows an application to receive the ACTION_BOOT_COMPLETED that is broadcast after the system finishes booting.
Allows access to the vibrator.
Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.
Allows a calling application which manages it own calls through the self-managed ConnectionService APIs.
Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
Required to be able to access the camera device.
Allows an application to record audio.
Allows an application to read from external storage.
Allows an application to read the user's contacts data.
Permission an application must hold in order to use ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS.
Allows an app to use fingerprint hardware.
Allows an application to use SIP service.