Other than the CryptoPhone G10i secure phone, the GSMK has also the CryptoPhone 220, a secure PDA phone.
GSMK CryptoPhone 220 is a Tri-band PDA phone running the Windows Mobile 5 OS. It has a 2.8-inch TFT LCD touchscreen with LED backlight, a 1.3 Megapixel CMOS camera, support for music and video playback. For connectivity, it has mini-USB connector, SDIO/MMC memory card slot and Bluetooth 1.1.
Strongest and most secure algorithms available today – AES256 and Twofish, 4096 bit Diffie- Hellman key exchange with SHA256 hash function, readout-hash based key authentication, 256 bit effective key length encryption, key is destroyed as soon as the call ends.
GSMK CryptoPhones are the only secure mobile phones on the market with full source code
published for independent security assessments – no proprietary or secret encryption, no
backdoors, no key-escrow, no centralized or operator-owned key generation, no key registration.