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    You are here: Home kb IPR & Products Patents

    Patents in the field of Speech Encryption

    • Digital speech encryption using encryption memory
    • Method of speech encryption by time scrambling
    • Speech and control message encryption in cellular radio.
    • Method and device for speech encryption and decryption in voice transmission
    • Digital Encryption Speech System using analog Telephone Line
    • Method for speech encryption with simultaneous data transmission in narrow band transmission system
    • Mobile or cordless phone with device for encrypting or decrypting speech and data, can store and transmit encryption keys via short range link