Access right managing system, portable terminal, gateway and contents server

An access right managing system having a portable terminal, a gateway and a contents server, wherein:

• the portable terminal comprises;
• first use request transmitting means for transmitting a request for use of a contents service,
• identification information receiving means for receiving predetermined identification information corresponding to the use request transmitted by the first use request transmitting means,
• identification information accepting means for accepting the input of an identifier and a password for the request for use of the contents service,
• second use request transmitting means for transmitting a use request including the identifier and password accepted by the identification information accepting means,
• contents data receiving means for receiving contents data corresponding to the use request transmitted by the second use request transmitting means, and
• display means for displaying information such as characters based on the contents data received by the contents data receiving means, and wherein:
• the gateway comprises;
• use request receiving means for receiving the use request transmitted by the use request transmitting means,
• first access request determining means for determining whether the use request received by the use request receiving means is the first request for access to the contents service,
• identification information transmitting means for assigning an identifier and a password to the request when it is determined to be the first access request by the first access request determining means and for transmitting the same to the portable terminal,
• authenticating means for authenticating the use request based on the identifier and password transmitted by the identification information transmitting means when it is determined not to be the first access request by the first access request determining means,
• access history information generating means for generating access history information including the time of the first access and a predetermined effective period each time an access is made to the contents service requested by the use request when the use request is authenticated by the authenticating means,
• access validity determining means for determining whether the use request received by the use request receiving means is within the effective period that starts at the time of the first access based on the access history information generated by the access history information generating means,
• acquisition requesting means for transmitting a request for acquisition of contents data when the use request is determined to be within the effective period by the access validity determining means,
• acquisition-requested contents data receiving means for receiving contents data corresponding to the request for acquisition transmitted by the acquisition requesting means, and
• contents data transfer means for transferring the contents data received by the acquisition-requested contents data receiving means to the portable terminal, and wherein:
• the contents server comprising;
• contents data storing means for storing contents data associated with each contents service in advance, and
• contents data transmitting means for reading the contents data requested by the acquisition requesting means from the contents data storing means and for transmitting the same to the gateway,
• wherein the portable terminal is granted use of the contents service by way of a plurality of different sessions with said contents server within the predetermined effective time, even when a disconnect period or periods exists between an operative time of any two the plurality of different sessions that are closest in operative time to each other.