Patent ID: 8214912
Filing Date: 2012-07-03
Classification: G06F

Abstract:
1. A method of temporarily using Digital Rights Management (DRM) contents, the method comprising: receiving a rights object including information required for using the contents; converting the rights object into a first temporary rights object and a second temporary rights object which are to be successively used for a temporary use of portions of the contents; transmitting, to an unauthorized device, the first temporary rights object, which is a temporary usage rights object required for using a first part of the contents and comprises an encryption key required for decrypting the contents, and the second temporary rights object, which is a temporary usage rights object required for using a second part of the contents; and decrypting the first part of the contents and the second part of contents with the encryption key transmitted with the first temporary rights object, wherein the first temporary rights object and the second temporary rights object allow use of the contents for a predetermined time.