发明名称 |
Verfahren zum Betrieb eines Datenkommunikationssystems, Datenkommunikationssystem und Kundenendgerät |
摘要 |
In a data communications system a remote data source outputs data as a series of application data units (ADUs). Each ADU is individually encrypted with a different key. The keys are transmitted (for example using Internet multicasting) via a communications network to one or more customer terminals. At the terminals a sequence of keys is generated for use in decrypting the ADUs. A record is kept of the keys generated, and this record may subsequently be used to generate a receipt for the data received by the customer. The keys may be generated, and the record stored within a secure module such as a smartcard. |
申请公布号 |
DE69825479(T2) |
申请公布日期 |
2005.07.28 |
申请号 |
DE1998625479T |
申请日期 |
1998.12.15 |
申请人 |
BRITISH TELECOMMUNICATIONS P.L.C., LONDON |
发明人 |
FAIRMAN, RALPH;BRISCOE, JOHN |
分类号 |
H04L9/10;G06F1/00;G06F21/10;H04L9/08;H04L9/16;H04L12/14;H04L12/18;H04L29/06 |
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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