| 摘要 |
A telephone communication system comprising a radiocommunication module ( 10 ) and a data encryption/decryption module ( 28 ), characterized in that the radiocommunication module ( 10 ) comprises a modem interface module ( 20 ) which is connected to the radiocommunication module ( 10 ) and controls an external modem ( 33 ). The encryption/decryption module ( 28 ) comprises a microcircuit support reader, an encryption/decryption circuit ( 29 ) and a vocoder circuit ( 30 ) receiving voice data to be encrypted or decrypted from the communication module ( 10 ). The encryption/decryption ( 29 ) of data is carried out directly in the encryption/decryption circuit ( 29 ) of the encryption/decryption module. |
