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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