Kryptering af mobiltelefoni

I disse tider hvor privat livets fred er under stærkt pres, er der kommet en stigende efterspørgsel på sikker kommunikation.

I den sammenhæng kunne jeg godt tænke mig at vide om der rent faktisk eksisterer mobiltelefoner som er sikre... firmaer som det tyske crytophone markedsfører sig som leverandør af "open source krytering", men er de rent faktisk troværdige? Det er jo de færreste som har den tekniske kunnen til at kontrollerer en sådan påstand.

    *  Full-featured PDA Phone with Voice & SMS Encryption
    * Fully Encrypted storage system for secure contacts, messages and keys
    * Encrypted storage system protects confidential data against unauthorized access in case the device is lost or stolen
    * Strongest and most secure algorithms available today
    * AES256 and Twofish
    * 4096 bit Diffie-Hellman key exchange with SHA256 hash function for voice as well as SMS
    * Readout-hash based key authentication
    * 256 bit effective key length
    * Voice encryption key is destroyed immediately after the call ends
    * Message encryption features initial key exchange with full 4096 bit key length, key forward hashing with individual encryption key for each message, SMS key information stored in secure storage container, and support for encrypted self-destructing >Eyes Only< messages
    * Source code available online for independent security assessments
    * Also supports unencrypted calls, unencrypted SMS, address book, calendar etc.
    * Works in any 850/900/1800/1900 GSM network that provides data call facilities
    * Standby: 200 hours
    * Talk time: up to 4 hours