Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2009-07-06
2009-12-29
Moise, Emmanuel (Department: 2437)
Cryptography
Communication system using cryptography
Symmetric key cryptography
Reexamination Certificate
active
07639810
ABSTRACT:
The invention is directed to a source device and a method for encrypting digital content at the source device. According to an embodiment, the method includes authenticating a target device connected to the source device using an identifier (ID) associated with at least one of the target device and a storage medium of the target device; performing an addition operation by using a source internal key and the ID, the source internal key being associated with the source device; generating a source encryption key based on an output of the addition operation; encrypting the digital content using the source encryption key; and transmitting the encrypted digital content without the source encryption key to the target device.
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Cho Young-Soon
Jung Han
Kang Myeong-Joon
Kim Jae-Young
Birch & Stewart Kolasch & Birch, LLP
LG Electronics Inc.
Moise Emmanuel
Pearson David J
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