Method and system of transmitting/receiving service information and receiving apparatus

A method of transmitting/receiving of service information, in which the service information from a transmitter is received only by a receiver terminal authorized by the transmitter, comprising the steps of:

• generating a reception authorization code at a transmitter end by appending an error detection code to reception authorization information indicating reception authorization of said service information, and synthesizing said reception authorization information appended with the error detection code and terminal unique information unique to each receiver terminal to be authorized;
• providing said reception authorization code to each receiver terminal from said transmitter;
• inputting said reception authorization code at said each receiver terminal end;
• obtaining said reception authorization information by decoding said input reception authorization code using said terminal unique information pre-stored in said each receiver terminal;
• detecting whether or not an error exists in said reception authorization information;
• and
• enabling said each authorized receiver terminal to receive said service information when said reception authorization information indicates the reception authorization and no error is detected, wherein:
• said reception authorization code generating step includes the sub-steps of,
• incorporating an expiration date of a reception authorization period into said reception authorization information, and
• transmitting time information showing a current time including day and hour from said transmitter;
• and
• said service information receiving step includes the sub-steps of,
• receiving said time information at said each receiver terminal end, and
• comparing said current time shown by said time information with said expiration date of the reception authorization period, said each receiver terminal being enabled to receive said service information when said current time shown by said time information is before said expiration date of the reception authorization period, said each receiver terminal being disabled to receive said service information when said time shown by said current time information exceeds said expiration date of the reception authorization period.

A system of transmitting/receiving service information, in which the service information from a transmitter is received only by a receiver terminal authorized by the transmitter,

• said transmitter comprising:
• an information generating source of the service information to be transmitted;
• transmitting means for transmitting said service information after adding service identification data indicating that only a predetermined receiver terminal is authorized to receive said service information;
• a user file for storing terminal unique information unique to said each authorized receiver terminal and service contents that said each authorized receiver terminal is authorized to receive;
• and
• reception authorization code generating means for generating and providing a reception authorization code to said each receiver terminal by reading out said terminal unique information and said service contents stored in said user file to generate reception authorization information corresponding to said service contents, and for synthesizing said reception authorization information appended with an error detection code and said terminal unique information, and
• said each receiver terminal comprising:
• receiving means for receiving the service information whose service identification data matches service identification data of receivable service information;
• input means for inputting said reception authorization code;
• storage means for storing said terminal unique information unique to said each authorized receiver terminal;
• and
• reception authorization code decoding means for decoding said input reception authorization code using said terminal unique information stored in said storage means and for detecting whether or not an error exists in decoded reception authorization information, said reception authorization code decoding means also for authorizing reception of said service information by said receiving means when said decoded reception authorization information indicates reception authorization and no error is detected wherein:
• said reception authorization code generating means generates said reception authorization code by synthesizing said reception authorization information appended with the error detection code, said terminal unique information stored in said user file, and transmission information which changes periodically;
• said transmitting means transmits a current value of said transmission information from said transmitter;
• said receiving means receives the current value of said transmission information;
• and
• said reception authorization code decoding means decodes said input reception authorization code using said terminal unique information stored in said storage means and the current value of said transmission information received.

A system of transmitting/receiving of service information in which the service information from a transmitter is received only by a receiver terminal authorized by the transmitter,

• said transmitter comprising:
• an information generating source of the service information to be transmitted;
• transmitting means for transmitting said service information after adding service identification data indicating that only a predetermined receiver terminal is authorized to receive said service information;
• a user file for storing terminal unique information unique to said each authorized receiver terminal and service contents that said each authorized receiver terminal is authorized to receive;
• and
• reception authorization code generating means for generating and providing a reception authorization code to said each receiver terminal by reading out said terminal unique information and said service contents stored in said user file to generate reception authorization information corresponding to said service contents, and for synthesizing said reception authorization information appended with an error detection code and said terminal unique information, and
• said each receiver terminal comprising:
• receiving means for receiving the service information whose service identification data matches service identification data of receivable service information;
• input means for inputting said reception authorization code;
• storage means for storing said terminal unique information unique to said each authorized receiver terminal;
• and
• reception authorization code decoding means for decoding said input reception authorization code using said terminal unique information stored in said storage means and for detecting whether or not an error exists in decoded reception authorization information said reception authorization code decoding means also for authorizing reception of said service information by said receiving means when said decoded reception authorization information indicates reception authorization and no error is detected wherein:
• said transmitting means sends time information showing a current time including day and hour;
• said reception authorization code generating means incorporates an expiration date of a reception authorization period into said reception authorization information;
• said receiving means receives said time information;
• said reception authorization code generating means compares said current time shown by said time information with said expiration date of the reception authorization period, and authorizes reception of said service information when said current time shown by said time information is before said expiration date of the reception authorization period, and inhibits the reception of said service information when said current time shown by said time information exceeds said expiration date of the reception authorization period.

A receiving apparatus for receiving service information having service identification data indicating that reception of said service information is authorized to only a certain receiver terminal in advance, comprising:

• receiving means for receiving the service information whose service identification data matches service identification data of receivable service information;
• input means for inputting a reception authorization code, said reception authorization code being provided to each receiver terminal to be authorized, said reception authorization code being generated by synthesizing reception authorization information indicating reception authorization of said service information and appended with an error detection code, and terminal unique information unique to said each receiver terminal:
• storage means for storing said terminal unique information unique to said each receiver terminal;
• and
• reception authorization code decoding means for decoding said input reception authorization code using said terminal unique information stored in said storage means and for detecting whether or not an error exists in decoded reception authorization information, said reception authorization code decoding means also for authorizing reception of said service information by said receiving means when said decoded reception authorization information indicates reception authorization and no error is detected, wherein:
• said receiving means receives a current value of transmission information which is transmitted from said transmitter and changes periodically;
• and
• said reception authorization code decoding means decodes said input reception authorization code using said terminal unique information stored in said storage means and the current value of said transmission information.

A receiving apparatus for receiving service information having service identification data indicating that reception of said service information is authorized to only a certain receiver terminal in advance, comprising:

• receiving means for receiving the service information whose service identification data matches service identification data of receivable service information;
• input means for inputting a reception authorization code, said reception authorization code being provided to each receiver terminal to be authorized said reception authorization code being generated by synthesizing reception authorization information indicating reception authorization of said service information and appended with an error detection code, and terminal unique information unique to said each receiver terminal;
• storage means for storing said terminal unique information unique to said each receiver terminal;
• and
• reception authorization code decoding means for decoding said input reception authorization code using said terminal unique information stored in said storage means and for detecting whether or not an error exists in decoded reception authorization information, said reception authorization code decoding means also for authorizing reception of said service information by said receiving means when said decoded reception authorization information indicates reception authorization and no error is detected, wherein:
• said receiving means receives time information which is transmitted from said transmitter and shows a current time including day and hour;
• and
• said reception authorization code decoding means compares said current time shown by said time information with an expiration date of a reception authorization period incorporated into said reception authorization information, and authorizes reception of said service information when said current time shown by said time information is before said expiration date of the reception authorization period, and inhibits the reception of said service information when said current time shown by said time information exceeds said expiration date of the reception authorization period.