发明名称 |
System and method for enhanced piracy protection in a wireless personal communication device |
摘要 |
A key-sharing scheme is used to control distribution and use of video and audio content in personal digital assistants (PDAs) and other wireless devices. A private key is split into key-shares using a Blakley-Shamir key splitting technique and the key-shares are distributed to various network entities including a finance server and security server. Key-shares are also stored in a user's subscriber identity module (SIM) and a security processor of the PDA. The key-shares from the network entities are provided to the PDA after the user requests specific video or audio content and a credit verification is performed. The PDA's security processor combines the key-shares to form the decryption key for use in playing the content by the PDA's communications processor. When a service limit is reached, the PDA's security processor purges the key-shares to prevent further use of the content.
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申请公布号 |
US7836515(B1) |
申请公布日期 |
2010.11.16 |
申请号 |
US20070882840 |
申请日期 |
2007.08.06 |
申请人 |
MARVELL INTERNATIONAL, LTD. |
发明人 |
WOODWARD ERNEST E. |
分类号 |
H04L9/28;G06Q30/00;H04L9/08;H04N7/16 |
主分类号 |
H04L9/28 |
代理机构 |
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主权项 |
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地址 |
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