Contents execution device equipped with independent authentication means and contents re-distribution method

A method for re-distributing content data received from a broadcasting station server and stored in a source device to a target device, the method comprising :determining, at the source device, whether or not re-distribution of the content data is permitted by checking bibliographic information of the content data;

• re-distributing, at the source device, the content data, information on at least one tool used to play the content data and an URL of the broadcasting station server from which the content data is received, to the target device;
• requesting permission to play the content data from the target device to the broadcasting station server;
• and determining, at the broadcasting server, whether or not to issue permission based on information on re-distribution number and maximum limit of re-distribution of the content data, granting the permission based on the determination result and the permission to the target device;
• acquiring, at the target device, at least one tool program used to encode or decode content data from the tool server;
• and receiving, at the target device, the permission and playing the content data.

A method for re-distributing content data received from a broadcasting station server and stored in a source device to a portable target device, the method comprising:

• determining, at the source device, whether or not re-distribution of the content data is permitted by checking bibliographic information of the content data;
• determining, at the source device, whether or not the portable target device belongs to the same domain to which the source device belongs;
• downloading, at the source device, at least one tool program used to encode or decode the content data at the portable target device, from a tool server;
• requesting permission to re-distribute the content data from the source device to the broadcasting station server;
• in response to the permission to re-distribute the content data from the broadcasting station server, re-distributing, at the source device, the content data, the at least one tool program and the permission to re-distribute, to the target device;
• and
• receiving, at the target device, the content data, the at least one tool program and the permission and playing the content data using the at least one tool program and the permission.