Need absolute privacy on your cell phone calls? Try the Cryptophone. The Cryptophone is a joint venture between Taiwanese smartphone maker HTC, and GSMK of Germany. The Cryptophone is a pretty normal clamshell phone with special software that encrypts your calls with "special software that encrypts calls with 4096 bit Diffie-Hellman key exchange and SHA256 hash function AES 256 and Twofish between Cryptophones."

The Cryptophone G10i pictured here is very similar to the HTC Star Trek. It is a quad-band GSM/GPRS phone with a 1.3 megapixel camera. Security doesn't come cheap as this phone sells for $2080. If you want security in a PDA phone you can check out the Cryptophone 220 but be prepared to shell out even more money.

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