Method of and device for updating group key
US8401182B2 · kind B2 · utility
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3References
11Claims
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Key dates
| Filing date | Jun 26, 2007 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Dec 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0836
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and device for updating a group key are disclosed. The group key updating method comprises determining a start node for a key update on a binary tree, updating a node key of the start node for a key update, updating a node key of a parent node of a node corresponding to the updated node key using the updated node key, and repeatedly performing the updating of the node key of the parent node, and then updating a node key corresponding to a root node of the binary tree. With the disclosed method and device, it is possible to efficiently perform a group key update process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.