CryptoPhone CP700

CryptoPhone 700

The GSMK CryptoPhone 700 is a secure mobile phone with a hardened operating system and end-to-end voice and message encryption. It delivers unparalleled 360-degree protection on a tamper-resistant platform.

The unique and patented GSMK Baseband Firewall protects the phone against IMSI catchers and other rogue base stations, including protection against over-the-air malware injection. The hardware is sealed against humidity and dust, and comes with a multi-touch capacitive touchscreen that can be operated with gloves and in rain.

More details can be found in the CP700 brochure (PDF).


The CP700 allows you to make secure end-to-end encrypted voice over IP calls on any network – 2G, 3G, 4G, 5G, or WiFi. This mobile phone comes with the strongest and most secure algorithms available today, AES256 and Twofish. It features a 4096 bit Diffie-Hellman key exchange with SHA-256 hash function, readout-hash based key authentication, and completely autonomous key generation with no pre-installed key material. Voice encryption keys are securely and immediately erased from the device after each call.

Messaging is based on the same strong encryption algorithms used for GSMK CryptoPhone voice encryption – 4096 bit Diffie-Hellman initial key exchange, AES256 and Twofish message encryption with 256 bit keys.

Unique two-layer data encryption scheme protects data at rest against unauthorized access. The CP700 provides a fully encrypted file system with key storage inside EAL4+ compliant hardware security chip - keys never leave the chip, but are exclusively used in on-chip cryptographic operations. In addition, there is a dedicated, fast-locking secure storage container for secure messages, contacts, and notes.

The CP700 is equipped with patented GSMK Baseband Firewall technology for unique protection against over-the-air attacks with constant monitoring of baseband processor activity. The Baseband Firewall features baseband attack detection and initiation of countermeasures, automatic discovery of IMSI catchers and other rogue base stations, and detection of attempts to track user location via SS7 or silent SMS.

The secure Android OS is built from source code and offers granular security management and streamlined, security-optimized components and communication stacks. The CP700 features a seamless secure boot chain featuring secure boot, kernel, recovery, kernel object and APK signature keys. Runtime checks of core applications and services ensure that only signed and trusted code is loaded on the device. All software components are signed with keys stored inside a Common Criteria EAL4+ compliant security chip.

The CP700 contains dedicated hardware security modules with a hardened security chip supporting the highest Common Criteria EAL4+ with AVA_VAN.5 extensions and FIPS 140-3 security requirements. It features a SoC security core with dedicated CPU, ROM, one-time-programmable (OTP) memory, cryptographic modules, internal SRAM, and protected DRAM.

The CP700 is ready for immediate use out of the box, with no need to install or configure anything. Set your password and immediately start to make and receive secure calls and exchange end-to-end encrypted messages with other CryptoPhone mobile or desktop phones. The CP700 can also be integrated into your organization’s private CryptoPhone infrastructure.

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