Broadcast encryption
US5592552A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1994 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Sep 24, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A selective broadcasting method operative to transmit a plurality of message data signals to a corresponding plurality of subscriber subsets within a set of subscribers, the method comprising receiving an indication of a privileged set comprising an individual subset and transmitting a message data signal from which a key can be extracted by members of the privileged set and cannot be extracted by any set of members outside the privileged set whose number of members is less than a predetermined resiliency, wherein the length of the message data signal is less than the sum of lengths of the message data signals required if an individual message data signal is transmitted to each subscriber in the privileged set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.