Method of videophone data transmission

Abstract

A method of videophone data transmission based on the PKI (Public Key Infrastructure) is executed with a videophone and a user. The method includes the steps of performing a connection procedure, performing a data download procedure and performing a disconnection procedure. While performing the connection procedure, a smart key, which stores at least one piece of user identification data, is connected to a videophone. The user identification data contains an ID code, a password and a private key of the user. While performing the data download procedure, the user identification data is encrypted and transmitted to a service server for verifying the user. Then, at least one service provided by the service server is encrypted and downloaded to the videophone. After decryption, the at least one service can be executed in the videophone. While performing a disconnection procedure, the smart key is disconnected from the videophone.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method of data transmission, and more particularly to a method of data transmission with a videophone as a terminal and operated with a smart key, which is suitable for transmission with confidential and / or value-added data. [0003] 2. Description of the Related Art [0004] A videophone uses H.322, SIP or other common communication protocols to provide a high quality audio-video (AV) data transmission and is currently a developed product. A user with Ethernet and an IP address can utilize the videophone to communicate with another videophone user worldwide, face-to-face. The videophone can be applied to all IP network structures including xDSL (x Digital Subscriber Lin), cable, LAN (Local Area Network) and VPN (Virtual Private Network). Thirty real-time image frames per second can be communicated through the videophones connected to a wideband network, and therefore the applications ...

AI Technical Summary

Benefits of technology

[0006] The smart key, which employs the PKI, contains an ID code, a password and a private key. When connected to the videophone, the smart key passes the information (ID code, password and private key) to the videophone to login to obtain the related authorities of services and the user data like a phone book. When two users have their own videophone, they can transmit data with encryption. A sender can encrypt the AV data with a public key, and a receiver can decrypt the AV data with a private key. Also, user's personal data can be transmitted in this way without risk.

Problems solved by technology

But if the verification of a user, the communication of confidential data or purchase of AV service is required, it is difficult for traditional videophones to meet these requirements.

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