Method of updating group key and group key update device using the same
US8270614B2 · kind B2 · utility
4Cited by
3References
28Claims
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Key dates
| Filing date | Jun 26, 2007 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Feb 17, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0891
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A group key update method and a group key update apparatus for updating a key of members in a group are provided. The group key update method includes selecting a sub-root node among nodes on the binary tree; performing a node change with respect to the group according to a type of the sub-root node, and generating a changed binary tree; and performing a node key update with respect to the changed binary tree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.