发明授权
- 专利标题: Digital content decrypting apparatus and operating method thereof
- 专利标题(中): 数字内容解密装置及其操作方法
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申请号: US12506198申请日: 2009-07-20
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公开(公告)号: US07639814B2公开(公告)日: 2009-12-29
- 发明人: Young-Soon Cho , Myeong-Joon Kang , Jae-Young Kim , Han Jung
- 申请人: Young-Soon Cho , Myeong-Joon Kang , Jae-Young Kim , Han Jung
- 申请人地址: KR Seoul
- 专利权人: LG Electronics Inc.
- 当前专利权人: LG Electronics Inc.
- 当前专利权人地址: KR Seoul
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: KR1999-4483 19990209; KR1999-4493 19990209
- 主分类号: H04L9/12
- IPC分类号: H04L9/12
摘要:
A device and method for decrypting digital contents are discussed. According to an embodiment, a method for decrypting digital content at a target device, includes receiving the digital content without a source encryption key from a source device connected to the target device, the digital content having been encrypted with the source encryption key in the source device; performing an addition operation by using a first target internal key and an identifier (ID), the first target internal key being associated with the target device, and the ID being associated with at least one of the target device and a storage medium of the target device; generating a target encryption key based on an output of the addition operation and a second target internal key by using a predetermined encryption algorithm, the second target internal key being associated with the target device; and decrypting the encrypted digital content using the target encryption key.