The invention provides an end-to-end voice
encryption communication method and an end-to-end voice
encryption communication device for mobile terminals. The method comprises the following steps of A / D data collection, specifically including dividing input
voice communication signals into voice frames with
fixed length by A / D conversion;
encryption, specifically including dynamically obtaining a key through operation of an access point, and then encrypting the voice frames; modulation, specifically including synthesizing encrypted data into voice signals by a modulator; vocoder
processing and
base station transmission, specifically including performing coding, encryption and other treatments on the synthesized voice signals by a mobile communication vocoder, after coding, sending to a
base station by a terminal through a
cell channel, and then transmitting to a receiving terminal by the
base station;
demodulation, specifically including demodulating the voice signals into encrypted voice frames by a demodulator; and decryption, specifically including decrypting the encrypted voice frames according to the
algorithm and key appointed by two parties in an end-to-end manner. The end-to-end voice encryption communication method and device for mobile terminals is simple in structure, reasonable in design, capable of implementing based on the inherent coding / decoding and encryption
algorithm of the mobile communication protocol, and low in
distortion rate, and can pass through the
voice data authenticity detection of the base
station.