发明名称 |
METHOD AND APPARATUS FOR CONTROLLING ACCESS TO DIGITAL SIGNALS |
摘要 |
A method and apparatus are provided for controlling access to digital signals sent via a first communication path and retransmitted over a second communication path. The digital signals, having been encrypted by a first encryption scheme and sent over the first communication path, are received and decrypted. The decrypted signals are then retransmitted over the second communication path using a second encryption scheme that differs from the first encryption scheme. |
申请公布号 |
CA2137616(A1) |
申请公布日期 |
1995.08.03 |
申请号 |
CA19942137616 |
申请日期 |
1994.12.08 |
申请人 |
GENERAL INSTRUMENT CORPORATION OF DELAWARE |
发明人 |
HAMILTON, JEFFREY S.;KAUFFMAN, MARC;VINCE, LAWRENCE D. |
分类号 |
H04L9/10;G09C1/00;H04L9/14;H04N7/167 |
主分类号 |
H04L9/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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