JP2006303875A - Visual telephone data communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a visual telephone data communication method, based on PKI (public-key-enciphered infrastructure system). <P>SOLUTION: A smart key which stores, at least, one of user identification data is connected to a visual telephone, while a connection procedure is being performed. The user identification data contain user ID codes, passwords, and private keys. While a download procedure is being performed, the user identification data are enciphered and transmitted to a service server to verify the user. Then, at least, one service provided by the service server is enciphered and downloaded to a visual telephone. After the service is deciphered, at least, the one service is performed in the visual telephone. While a disconnection procedure is being performed, smart key is cut off from the visual telephone. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data communication method, and more particularly to a data communication method using a videophone as a terminal operated by a smart key, which is suitable for communication of confidential data and / or value-added data.

  Videophones use H.322, SIP or other common communication protocols to provide high-definition audio-video (AV) data communications, and are currently in production. A user having an IP address can communicate with other videophone users all over the world using Ethernet (registered trademark) and using a videophone. Videophones can be applied to all IP network structures including xDSL (x digital subscriber line), cable, LAN (local area network) and VPN (virtual private network). Real-time images of 30 frames per second can be sent via a video phone connected to a broadband network, and therefore remote AV communication applications such as distance learning, remote monitoring and video conferencing can be achieved by a video phone. it can.

  However, when it is necessary to verify the user, communicate confidential data, or purchase an AV service, it is difficult to satisfy these requirements with the conventional videophone.

  The primary object of the present invention is based on PKI (Public Key Cryptographic Infrastructure System) to implement data communication methods, in particular sensitive data and / or value added data (one or more). It is an object of the present invention to provide a videophone data communication method using an identification code in a smart key combined with a videophone.

  A smart key using PKI has an ID code, a password, and a secret key. When connected to the videophone, the smart key passes the information (ID code, password and secret key) to the videophone and logs in to obtain the corresponding authority of the service and user data such as a telephone directory. If two users each have their own videophone, each can send encrypted data. The sender can encrypt the AV data with the public key, and the receiver can decrypt the AV data with the secret key. In addition, the user's personal data can be transmitted without risk by this method.

  Two types of connection methods are used for the connection between the videophone and the smart key. Wired and wireless. The smart key can store a user interface having a phone book, a standby screen, a status icon, and a ringing melody. In addition, the smart key can store preloaded application programs to enjoy customized functions. In general, a wired smart key can be equipped with a larger amount of memory and is particularly suitable for storing large amounts of data as described above.

  To achieve the above object, the present invention discloses a videophone data communication method executed by a videophone and a user. The method comprises the steps of performing a connection procedure, performing a data download procedure, and performing a disconnect procedure. In performing the connection procedure, a smart key having at least one type of user identification data (of the smart key holder), which is a user ID code, a password or at least one secret key, is used. The step of executing the data download procedure includes a step of encrypting user identification data, a step of transmitting user identification data to a service server, a step of verifying a user, a step of encrypting a service provided by the service server, and a service. It further includes the steps of downloading to the videophone, decrypting the service, and executing the service on the videophone.

  In addition to the direct access to the service from the service server described above, if two users each have their own videophone and smart key (eg, the first user has the first smart key and the first If you have a videophone and the second user has a second smart key and a second videophone), the two users can send encrypted AV data between them. In order to establish this type of communication, a videophone data communication method is disclosed as follows.

  First, a first user sends a request to a second user. If the second user accepts the request, the first user encrypts the first AV data and sends the first encrypted AV data to the second videophone of the second user. The second user then decrypts the encrypted AV data using the secret key stored in the second smart key. On the other hand, the second user can encrypt the second AV data and send the second encrypted AV data to the first videophone of the first user. After receiving the second encrypted AV data, the first user can decrypt the second encrypted AV data.

  The present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a system diagram for implementing the videophone data communication method of the present invention. The system includes a service server 31, a key server 32, a communication network 33, a videophone 34, another videophone 35, a first smart key 36, and a second smart key 37. The service server 31 provides several services such as movie on demand, conference service, IP phone, quality of service, etc. to the users of the videophones 34 and 35. The key server 32 provides the public key to users on the network. The communication network 33 has an IP network structure including xDSL (x digital subscriber line), cable, LAN (local area network), VPN (virtual private network), Internet, ISDN (integrated service digital network), and general telephone line. Can be any of the following. The first smart key 36 held by the first user is a memory device that stores at least one of the user identification data, which is the first user's ID code, password, or first secret key. . The first smart key 36 also stores a plurality of application programs, a plurality of icons, and a plurality of digital photographs. After the first smart key 36 is connected to the videophone 34, an application program can be executed on the videophone 34 and a digital photo can be selected as the welcome screen. Two types of connection methods are used for the connection between the videophone and the smart key. Wired and wireless. Wired connection methods include USB (Universal Serial Bus), FireWire (or IEEE 1394 interface), SD (Secure Digital) or CF (Compact Flash (registered trademark)). Wireless connection methods include Wi-Fi (Wireless Fidelity), Bluetooth or IR (Infrared). FIG. 1 of the embodiment of the present invention shows a wireless connection between the first smart key 36 and the video phone 34 and a wired connection between the second smart key 37 and the video phone 35.

  FIG. 2 is a flowchart of the videophone data communication method of the present invention. Initially, a first smart key 36 is connected to the videophone 34 to establish a connection. Next, a data download procedure is performed in order to download at least one service provided by the service server 31 to the videophone 34 (S20). Finally, a disconnection procedure is performed to disconnect the first smart key 36 from the videophone 34 (S30).

  FIG. 3 shows a detailed flowchart for executing the connection procedure (S10) under the condition of the cool plug and the warm plug. If the first user holds the first smart key 36 for connecting to the videophone 34, the videophone 34 determines the connection type and connection conditions (S101). There are three connection conditions, which are described below, a cool plug, a warm plug, and a hot plug. When the videophone 34 is disconnected, the first smart key 36 is connected to the videophone 34 only by a wired connection (that is, a cool plug). After the connection, the first user turns on the videophone 34 (S102), and performs system initialization for resetting the parameters of the videophone 34 (S105). The video phone 34 is already on (ie, normal operating state), needs to be restarted (for example, if the IP address is changed), and the first smart key 36 is already connected to the video phone 34 ( That is, in the case of a warm plug), the videophone 34 is restarted (S103), and then system initialization for resetting the parameters of the videophone 34 is performed (S105). After the system initialization, the first smart key is detected in order to confirm the establishment of an appropriate connection (S104).

  FIG. 4 shows a flowchart for executing the connection procedure (S10) under hot plug conditions. Under this condition, the videophone 34 is already on and is in standby mode. First, it is determined whether the videophone 34 is occupied by a smart key (S106). If the videophone 34 is occupied, the videophone 34 will remain in standby mode. If the video phone 34 is not occupied, after the first smart key 36 is connected to the video phone 34 by a wired or wireless connection, smart key detection is performed immediately to confirm the establishment of an appropriate connection. (S104).

  FIG. 5 shows a detailed flowchart for implementing the data download procedure (S20). After the connection between the first smart key 36 and the videophone 34, the user identification data in the first smart key 36 is encrypted using the public key of the service server 31, and the encrypted user identification data is serviced. It is transmitted to the server 31 (S201). The public key of the service server 31 is retrieved from the key server 32. Next, the service server 31 verifies the encrypted user identification data using its own secret key to confirm the first user (S202). Thereafter, the service server 31 retrieves the first user's public key from the key server 32, encrypts at least one service provided by the service server 31, and then transmits the encrypted at least one service to the videophone. 34 (S203). The videophone 34 then decrypts at least one service using the first user's private key. The at least one service includes at least one UI (user interface) of the first user, at least one of user personal data of the first user and at least one application program of the first user. The UI includes a standby screen, an icon, a call melody, and the like. The personal data of the user includes a telephone directory, a call log, a telephone setting, and the like. The application program includes a patch, an AV codec, a customer creation program, and the like. Finally, a local service procedure is executed (S205). This means that at least one service or at least one preloaded application program is executed on the videophone 34. The application program loaded in advance is not provided by the service server 31 but is stored in advance in the smart key 36. Further, the at least one service includes an online service such as a movie on demand, a conference service, an IP phone, quality of service, etc., or an offline service that is completely downloaded to the video phone 34 and executed on the video phone 34. Can do.

  FIG. 6 shows a flowchart for executing the local service (S205). After at least one service has been downloaded to the videophone 34, the videophone 34 will check whether the at least one service includes a personal UI (S205a). If the personal UI is included, the personal UI is loaded onto the videophone 34 and the previous personal UI is updated (S205b). Thereafter, the videophone 34 checks whether or not at least one service includes the user's personal data (S205c). If user personal data is included, the user personal data is loaded onto the videophone 34 and the previous user personal data is updated (S205d). Next, the videophone 34 checks whether at least one service includes at least one application program (S205e). If the application program is included, the application program is loaded and executed (S205f).

  When the first user wants to disconnect the first smart key 36 from the videophone 34, a disconnection procedure (S30) is performed. FIG. 7 shows a flowchart of the cutting procedure. The procedure is described as follows. A prompt prompting the first user to save the user's personal data is displayed (S301). If the user personal data is corrected and changed, the user personal data is saved (S302). After saving the data, before disconnecting the smart key, the connection type is checked (S303). If the wireless connection is used, the video phone 34 shifts to a normal operation state. If the wired connection is used, the videophone 34 instructs to disconnect the first smart key (S304). Thereafter, the videophone 34 checks whether or not the first smart key 36 is disconnected (S305). If the first smart key 36 is disconnected, the videophone 34 shifts to a normal operation state.

  FIG. 8 shows a flowchart of abnormal disconnection. If the wired type first smart key is disconnected without following the flowchart of FIG. 7, the videophone 34 displays a warning prompt to inform the first user of possible data loss (S311). Next, the videophone 34 checks whether or not the first smart key 36 is reconnected within a certain time (S312). If the first smart key 36 is reconnected within a certain period of time, the videophone 34 transitions to a normal operating state, otherwise it rejects all changes (S313) and returns to the normal operating state. Transition.

  When the first user and the second user have the first smart key 36 and the second smart key 37, respectively, both the first user and the second user encrypt using the public key. The encrypted AV data can be communicated with each other, and the AV data can be decrypted using the secret key. A flowchart of encrypted communications using two smart keys and a videophone by two users is described below.

  Referring to FIG. 9, when the connection between the smart key and the videophone is established, the first user sends a request to the second user and waits for a response from the second user (S41). Next, the videophone 34 checks whether the answer is acceptance or rejection (S42). If the answer is “accepted”, the first user encrypts the first AV data using the public key of the second user retrieved from the key server 32, and the encrypted first AV Data is transmitted to the second user (S43). Thereafter, the second user decrypts the first AV data encrypted using the second user's private key stored in the second smart key 37 (S44). On the other hand, the second user encrypts the second AV data using the public key of the first user retrieved from the key server 32, and the encrypted second AV data is stored in the first user. (S45). Next, the first user decrypts the second AV data encrypted using the first user's private key stored in the first smart key 36 (S46). Both of the videophones 36 and 37 shift to their normal operation states. If the answer is “rejected”, a reject message is displayed, the communication remains in an unencrypted state, and after the completion of the communication, both videophones 36 and 37 shift to their normal operating states.

  The above-described embodiments of the present invention are for illustrative purposes only. Those skilled in the art can devise numerous other embodiments without departing from the scope of the appended claims.

1 is a system diagram for implementing a videophone data communication method of the present invention. FIG. It is a flowchart of the videophone data communication method of the present invention. Shows a flowchart to implement the connection procedure Shows a flowchart to implement the connection procedure Shows a flowchart to implement the data download procedure Shows a flowchart for implementing a local service procedure Shows a flow chart for performing the cutting procedure Shows a flow chart for performing the cutting procedure The flowchart of the encryption communication of this invention is shown

Explanation of symbols

31 Service Server 32 Key Server 33 Communication Network 34, 35 Videophone 36, 37 Smart Key

Claims (24)

In a videophone data communication method executed by a user using a videophone,
Performing a connection procedure, wherein a smart key storing at least one user identification data of the user is connected to the videophone, wherein the user identification data includes at least one secret key; ,
Performing a data download procedure in which at least one service provided by a service server is downloaded to the videophone; and performing a disconnect procedure in which the smart key is disconnected from the videophone;
A videophone data communication method characterized by comprising:   2. The videophone data communication method according to claim 1, which is performed on a public key encryption infrastructure system.   2. The videophone data communication method according to claim 1, wherein the user identification data further includes an identification (ID) code or a password.   The television according to claim 1, wherein the smart key is connected to the videophone via a wired connection, and the wired connection is selected from USB, Firewire, Secure Digital, or Compact Flash (registered trademark). Telephone data communication method.   2. The videophone data communication method according to claim 1, wherein the smart key is connected to the videophone via a wireless connection, and the wireless connection is selected from WiFi, Bluetooth, or infrared. When the videophone is disconnected, the connection procedure is:
Connecting the smart key to the videophone via a wired connection;
Placing the videophone; and performing system initialization to reset the videophone parameters;
The videophone data communication method according to claim 1, further comprising: When the videophone is on, the connection procedure is:
Connecting the smart key to the video phone;
Restarting the videophone, and performing system initialization to reset the videophone parameters;
The videophone data communication method according to claim 1, further comprising:   The connection procedure includes determining whether the smart key is connected to the videophone via a wired connection or to the videophone via a wireless connection. 2. The videophone data communication method according to 1. The data download procedure includes:
Encrypting the at least one user identification data;
Transmitting the at least one user identification data to the service server;
Verifying the user;
Encrypting the at least one service provided by the service server;
Downloading the at least one service to the videophone;
Decrypting the at least one service; and executing the at least one service in the videophone;
The videophone data communication method according to claim 1, further comprising:   10. The videophone data communication method according to claim 9, wherein the user identification data is encrypted using a public key retrieved from a key server to the service server.   10. The videophone data communication method according to claim 9, wherein the user is verified by the service server verifying the at least one user identification data using a secret key of the service server.   10. The videophone data communication method according to claim 9, wherein the at least one service is encrypted using a public key of the user, and the public key is stored in the key server.   10. The videophone data communication method according to claim 9, wherein the at least one service is encrypted using the secret key.   The data download procedure further comprises executing at least one preloaded application program in the videophone, wherein the at least one preloaded application program is stored in the smart key; The videophone data communication method according to claim 9, wherein:   The television of claim 9, wherein the at least one service includes at least one user interface (UI) of the user, at least one personal data of the user, or at least one application program of the user. Telephone data communication method.   16. The videophone data communication method according to claim 15, wherein the user interface and the personal data are refreshed.   16. The videophone data communication method according to claim 15, wherein the user interface is a standby screen, an icon, or a ringing melody.   16. The videophone data communication method according to claim 15, wherein the personal data is a telephone directory, a communication log, or a telephone setting.   16. The videophone data communication method according to claim 15, wherein the application program is a patch, an audio-video (AV) codec, or a customer created program.   16. The videophone data communication method according to claim 15, further comprising the step of determining whether or not the user has successfully logged out before performing the connection procedure. Video phone data communication performed by a first smart key, a second smart key, a first video phone corresponding to the first smart key and a second video phone corresponding to the second smart key In the method
Sending a request to a second user by a first user;
If the second user accepts the request, encrypting the first AV data by the first user;
Transmitting the encrypted first AV data from the first videophone of the first user to the second videophone used by the second user; and the second smart key. Decrypting the encrypted first AV data by the second user using a second secret key stored in
A videophone data communication method characterized by comprising: Encrypting second AV data by the second user;
Transmitting the encrypted second AV data from the second videophone to the first videophone used by the first user; and stored in the first smart key. Decrypting the encrypted second AV data by the first user using one private key;
The videophone data communication method according to claim 21, further comprising:   22. The videophone data communication method according to claim 21, wherein the first AV data is encrypted by the first user using the public key of the second user obtained from a key server.   The videophone data communication method according to claim 22, wherein the second AV data is encrypted by the second user using the public key of the first user obtained from a key server.

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