Hierarchical threshold tree-based broadcast encryption method
US8005225B2 · kind B2 · utility
3Cited by
4References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 27, 2006 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Nov 19, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A hierarchical threshold tree-based broadcast encryption method includes a first step for a server initialization and a user subscription, a second step of distributing a message to enable a privileged user (authorized user) to decrypt a group key, and a third step of the privileged user (authorized user) decrypting the message using the group key. According to the method, it is possible to prevent any group of revocators from obtaining the group key using their secret information and information being broadcast by the server.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.