Right object acquisition method and system

A rights object acquisition method comprising:

• transmitting a rights object request message requesting one or more rights objects of content objects from a mobile terminal to a first rights issuer;
• creating, at the first rights issuer, a first rights object response message containing at least one of rights objects indicated by the rights object request message and at least one signature;
• transmitting the rights object request message and the first rights objects response message from the first rights issuer to a second rights issuer designated in the rights object request message;
• creating, at the second rights issuer, a second rights object response message containing at least one of rights objects indicated by the rights object request message and at least one signature;
• and
• transmitting, when no other rights issuer designated in the rights object request message is remained, the second rights object response message from the second rights issuer to the mobile terminal.

A rights object acquisition method comprising:

• transmitting a rights object request message requesting one or more rights objects of content objects form a mobile terminal to a first rights issuer;
• transmitting the rights object request message from the first rights issuer to a second rights issuer designated in the rights object request message;
• transmitting a rights object response message containing at least one of the rights objects indicated by the rights object request message and the first rights issuer's signature from the first rights issuer to the mobile terminal;
• and
• transmitting a right object response message containing at least one of the rights objects indicated by the rights object request message and the first rights issuer's signature from the first rights issuer to the mobile terminal.

A rights object acquisition method comprising:

• transmitting a first rights object request message requesting one or more rights objects of contents objects from a mobile terminal to a broker server;
• transmitting the second rights object request message from the broker server to at least one rights issuer;
• transmitting a first rights object response message containing at least one of rights objects indicated by the rights object request message and a signature of the rights issuer from the individual rights issuer to the broker server;
• and
• transmitting a second rights object response message created on the basis of the first rights object response message from the broker server to the mobile terminal.