Apparatus and method for implementing end-to-end encrypted communication between line telephone and GSM handset

Abstract

This invention discloses a device and a method for end-to-end ciphered communication between wire telephones and cell phones. A MODEM module of the device is connected with the wire phone net, GSM module is connected with GSM net, the exchange module is connected with MODEM and GSM module, a control module is connected with the MODEM, exchange and GSM, a power supply module provides working supply to the modules. The secure communication is realized by the following steps taking the wire phone secure set as the calling party: 1, the calling party dials the gateway access number and a called cell phone number, 2, PSTN exchange provides the dial number to the gate, its MODEM extracts the number to the control module, 3, the control module calls the cell phone by GSM net, 4, the cell phone sends a response to GSM module to set up GSM communication, 5, the control sends the response to the server set to set up PSTN communication connection, 6, the control module controls the exchange module to connect MODEM and GSM modules for secure communication.

Description

technical field [0001] The present invention relates to the security technology of mobile communication and wired telephone network communication, in particular to an interconnection gateway device for mutual dialing and confidential communication between a wired phone and a GSM mobile phone, and a method for realizing end-to-end voice and data encrypted communication with the device. Background technique [0002] The wired telephone network is currently the most widely used fixed telephone network in the world, with billions of users worldwide. The GSM digital mobile communication system is currently the most successful mobile communication network, and the number of users in China has exceeded 200 million. Because the PSTN wired telephone network and the GSM network are general-purpose networks, they have no encryption function, and illegal users can easily intercept phone calls, faxes, data and other legal user information by using simple techniques. Therefore, it is imp...

AI Technical Summary

Problems solved by technology

However, the existing GSM mobile phone security machine can only call the wired telephone security machine to realize end-to-end secure communication, but cannot implement the wired telephone security machine to call the GSM mobile phone security machine itself to realize end-to-end secure communication

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