Gateway, communication terminal equipment, and communication control program

A communication control program on the side of a communication terminal equipment, for communicating data through a wireless network, causing a computer to execute the process comprising the steps of:

• obtaining an address of a gateway having a security capability through said wireless network when said communication terminal equipment comes into a communicable area serviced by said wireless network;
• communicating data with said gateway based on said obtained address, determining an authenticating system and an encrypting and a decrypting rules for the data to be communicated, and authenticating said gateway and said communication terminal equipment according to said authenticating system;
• and
• encrypting data destined for another computer according to said encrypting rule, transmitting said encrypted data to said gateway through said wireless network, and decrypting said decrypted data received from said gateway through said wireless network according to said decrypting rule.

A communication control method on the side of a gateway, for relaying data to be transferred between a wireless network and another computer, comprising the steps of:

• periodically transmitting a message for indicating securement of a security capability on said wireless network in a broadcasting manner;
• communicating data with said communication terminal equipment in response to a request from a communication terminal equipment having received said message, determining an authenticating system and an encrypting and a decrypting rules for the data to be communicated, and giving an authentication between said gateway and said communication terminal equipment according to said authenticating system;
• and
• encrypting the data destined for said communication terminal equipment according to said encrypting rule, transmitting said encrypted data through said wireless network, and decrypting said encrypted data received from said communication terminal equipment through said wireless network according to said decrypting rule.

A gateway for relaying data to be transferred between a wireless network and another network, comprising:

• a connection checking unit of periodically transmitting a message for indicating securement of a security capability on said wireless network;
• a communication path automatic establishing unit of communicating data with a communication terminal equipment in response to a request from said communication terminal equipment received said message, determining an authenticating system and an encrypting and a decrypting rules for data to be communicated, and giving an authentication between said gateway and said communication terminal equipment according to said authenticating system;
• and
• encrypting data destined for said communication terminal equipment according to said encrypting rule, transmitting said encrypted data through said wireless network, and decrypting said encrypted data received from said communication terminal equipment through said wireless network according to said decrypting rule.

A communication terminal equipment for communicating data through a wireless network, comprising:

• a received data processing unit of obtaining an address of a gateway having a security capability through said wireless network when said communication terminal equipment comes into a communicable area serviced by said wireless network;
• a communication path automatic establishing unit of communicating data with said gateway based on said obtained address, determining an authenticating system and an encrypting and a decrypting rules for data to be communicated, and giving an authenticating between said gateway and said communication terminal equipment according to said authenticating system;
• and
• an encrypting communication unit of encrypting data destined for another computer according to said encrypting rule, transmitting said encrypted data to said gateway through said wireless network, and decrypting said encrypted data received from said gateway through said wireless network according to said decrypting rule.

A computer-readable recording medium on which is recorded data to be transferred between a wireless network and another computer and a program on the side of a gateway to be relayed therebetween, causing said computer to execute the process comprising the steps of:

• periodically transmitting a message for securement of a security capability on said wireless network in a broadcasting manner;
• communicating data with a communication terminal equipment in response to a request from said communication terminal equipment having received said message, determining an authenticating system and an encrypting and a decrypting rules for data to be communicated, and giving an authentication between said computer and said communication terminal equipment according to said authenticating system;
• and
• encrypting data destined for said communication terminal equipment according to said encrypting rule, transmitting said encrypted data through said wireless network, and decrypting said encrypted data received from said communication terminal equipment through said wireless network according to said decrypting rule.

A computer-readable recording medium on which is recorded a program on the side of a communication terminal equipment for communicating data through a wireless network, causing said computer to execute the process comprising the steps of:

• obtaining an address of a gateway having a security capability through said wireless network, when said communication terminal equipment comes into a communicable area serviced by said wireless network;
• communicating data with said gateway based on said obtained address, determining an authenticating system and an encrypting and a decrypting rules for data to be communicated, and giving an authentication between said gateway and said communication terminal equipment according to said authenticating system;
• and
• encrypting data destined for another computer according to said encrypting rule, transmitting said encrypted data to said gateway through said wireless network, and decrypting said encrypted data received from said gateway through said wireless network according to said decrypting rule.