The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 2009
Filed:
Jul. 06, 2009
Young-soon Cho, Pyungtaek, KR;
Myeong-joon Kang, Pyungtaek, KR;
Jae-young Kim, Seoul, KR;
Han Jung, Seoul, KR;
Young-Soon Cho, Pyungtaek, KR;
Myeong-Joon Kang, Pyungtaek, KR;
Jae-Young Kim, Seoul, KR;
Han Jung, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
The invention is directed to a source device and a method for encrypting digital contents at the source device. According to an embodiment, the method includes receiving digital content from an external device, the digital content being encrypted using a first encryption algorithm in the external device; decrypting the received digital content; performing an addition operation by using a first source internal key and an identifier (ID), the ID being associated with at least one of a target device and a storage medium of the target device; generating a source encryption key based on an output of the addition operation and a second source internal key by using a second encryption algorithm; re-encrypting the decrypted digital content using the source encryption key; and transmitting the re-encrypted digital content without the source encryption key to the target device.