Patent ID: 9467428
Filing Date: 2016-10-11
CPC Classification: H04L,H04W

Claim Text:
1. An information security device for voice communications between terminals in a network, comprising: one or more units being configured and executed by a processor using algorithms which associated with least one non-transitory storage device, the algorithms which when executed, causes the processor to perform the one or more units, the one or more units comprising, a user interface unit configured to receive an information security request from a user, and to display whether or not information security is being performed; a compression unit configured to compress a voice signal received from the user by digitizing the voice signal; an encryption and decryption unit configured to encrypt the compressed voice data in response to detection of an information security request from the user or in response to detection of an information security control command of a counterpart information security attachment device, the encryption being performed by exchanging keys between a terminal of the user and the counterpart information security attachment device to make the voice data in security based on the keys, the keys for encryption and decryption the voice data through key exchange protocol, and in response to detection of completion of the exchanging keys, to request the terminal of the user to send the encrypted voice data, to decrypt the encrypted voice data received from the terminal in response to detection of an information security request or in response to detection of an information security control command of the counterpart information security attachment device, and to output the decrypted voice data; and a conversion unit configured to restore the voice data decrypted by the encryption and decryption unit to an analog voice signal, and to output the restored analog voice signal.