# CSG Federal

> CSG Federal (iPhone/iPad app by Cellcrypt Inc..)

- Source: https://appshunter.io/ios/app/csg-federal/id6478136671 (this page in markdown: same URL + `.md`)
- Developer: [Cellcrypt Inc.](https://appshunter.io/developer/967124070)
- Category: Business
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 228 MB
- Languages: Arabic, English, Japanese, Portuguese
- Released: 2024-04-16
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/csg-federal/id6478136671/reviews.md

## What is CSG Federal?

*Can only be used with an Valid Enterprise License.*

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.

Cellcrypt 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.

Cellcrypt 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. Cellcrypt'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.

Cellcrypt 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, Cellcrypt conference calls eliminate the need for participant PINs and passwords.

Work Anywhere, on Any Device

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

End-to-End Encryption

Cellcrypt 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 Cellcrypt, 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

Cellcrypt is designed to meet the highest international security standards and is trusted by businesses and governments worldwide for protecting their most sensitive communications.

Developed by an international team across multiple countries, Cellcrypt represents a truly global solution for secure communications.


## Version history (last 5 releases)

### 4.91.1 — 2026-01-29

- Improvements to onboarding experience

### 4.90.0 — 2025-11-17

- Fixed mute calls when peers are on the same LAN

### 4.86.9 — 2025-09-01

- Fixes for incoming call crashes

### 4.86.7 — 2025-08-25

- Prevents messages to users who have not yet signed in from being resent

### 4.86.6 — 2025-08-23

- Fix for sign-in issues on certain network conditions

## More apps by Cellcrypt Inc.

- [Cellcrypt Enterprise](https://appshunter.io/ios/app/cellcrypt-enterprise/id967124071)
- [Cellcrypt Federal](https://appshunter.io/ios/app/cellcrypt-federal/id1525373422)
- [Obsidian Ghost Federal](https://appshunter.io/ios/app/obsidian-ghost-federal/id6444109335)
- [Cellcrypt Government](https://appshunter.io/ios/app/cellcrypt-government/id6670765181)
- [Cellcrypt Tactical](https://appshunter.io/ios/app/cellcrypt-tactical/id6738664284)

All apps by Cellcrypt Inc.: https://appshunter.io/developer/967124070

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*