Information intermediating apparatus, information providing apparatus, and information acquiring apparatus

A method for intermediating information executed in an information intermediating apparatus in an information transaction system that is composed of an information providing apparatus, an information acquiring apparatus and the information intermediating apparatus which are connected to a communication network,

• the method comprising steps of:
• receiving second information from among first and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus, and first feature information indicating a feature of the first information;
• receiving second feature information from the information acquiring apparatus, the second feature information being calculated from the first information transmitted to the information acquiring apparatus from the information providing apparatus;
• determining whether an identity is present between the first feature information and the second feature information;
• and
• transmitting the second information to the information acquiring apparatus, in response to determining that the identity is present between the first feature information and the second feature information, wherein
• the information intermediating apparatus does not store the transaction object information.

A program stored in a non-transitory computer readable media executed in an information intermediating apparatus in an information transaction system that is composed of an information providing apparatus, an information acquiring apparatus and the information intermediating apparatus which are connected to a communication network,

• the program comprising steps of:
• a first receiving step of receiving second information from among first and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus, and first feature information indicating a feature of the first information;
• a second receiving step of receiving second feature information from the information acquiring apparatus, the second feature information being calculated from the first information transmitted to the information acquiring apparatus from the information providing apparatus;
• a determining step of determining whether an identity is present between the first feature information and the second feature information;
• and
• a transmitting step of transmitting the second information to the information acquiring apparatus, in response to determining that the identity is present between the first feature information and the second feature information, wherein
• the information intermediating apparatus does not store the transaction object information.

An information providing apparatus in an information transaction system that is composed of the information providing apparatus, an information acquiring apparatus and an information intermediating apparatus which are connected to a communication network, the information providing apparatus comprising:

• an acquiring unit that acquires first information and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus;
• a feature information generation unit that generates first feature information indicating a feature of the first information;
• a first transmitter that transmits the first information to the information acquiring apparatus;
• and
• a second transmitter that transmits the second information and the first feature information to the information intermediating apparatus, wherein
• the information intermediating apparatus does not store the transaction object information.

A method for providing information executed in an information providing apparatus in an information transaction system that is composed of the information providing apparatus, an information acquiring apparatus and an information intermediating apparatus which are connected to a communication network,

• the method comprising steps of:
• acquiring first information and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus;
• generating first feature information indicating a feature of the first information;
• transmitting the first information to the information acquiring apparatus;
• and
• transmitting the second information and the first feature information to the information intermediating apparatus, wherein
• the information intermediating apparatus does not store the transaction object information.

A program, stored in a non-transitory computer readable media, executed in an information providing apparatus in an information transaction system that is composed of the information providing apparatus, an information acquiring apparatus and an information intermediating apparatus which are connected to a communication network,

• the program comprising steps of:
• an acquiring step of acquiring first information and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus;
• a generating step of generating first feature information indicating a feature of the first information;
• a first transmitting step of transmitting the first information to the information acquiring apparatus;
• and
• a second transmitting step of transmitting the second information and the first feature information to the information intermediating apparatus, wherein
• the information intermediating apparatus does not store the transaction object information.

An information acquiring apparatus in an information transaction system that is composed of an information providing apparatus, the information acquiring apparatus and an information intermediating apparatus which are connected to a communication network, the information acquiring apparatus comprising:

• a first receiver that receives first information from among first and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus;
• a feature information generating unit that generates second feature information indicating a feature of the first information;
• a transmitter that transmits the second feature information to the information intermediating apparatus;
• a second receiver that receives the second information from the information intermediating apparatus;
• and
• a restoring unit that decodes and restores the transaction object information from the first information and the second information, wherein
• the information intermediating apparatus does not store the transaction object information.

A method for acquiring information executed in an information acquiring apparatus in an information transaction system that is composed of an information providing apparatus, the information acquiring apparatus and an information intermediating apparatus which are connected to a communication network,

• the method comprising steps of:
• receiving first information from among first and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus;
• generating second feature information indicating the first information;
• transmitting the second feature information to the information intermediating apparatus;
• receiving the second information from the information intermediating apparatus;
• and
• decoding and restoring the transaction object information from the first information and the second information, wherein
• the information intermediating apparatus does not store the transaction object information.

A program stored in a non-transitory computer readable media executed in an information acquiring apparatus in an information transaction system that is composed of an information providing apparatus, the information acquiring apparatus and an information intermediating apparatus which are connected to a communication network,

• the program comprising steps of:
• a first receiving step of receiving first information from among first and second information which are necessary for decoding and restoring transaction object information by the information acquiring apparatus;
• a generating step of second feature information indicating the first information;
• a transmitting step of transmitting the second feature information to the information intermediating apparatus;
• a second receiving step of receiving the second information from the information intermediating apparatus;
• and
• a restoring step of decoding and restoring the transaction object information from the first information and the second information, wherein
• the information intermediating apparatus does not store the transaction object information.