Method and apparatus for providing authenticated challenges for broadcast-multicast communications in a communication system
US8724803B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2004 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Oct 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/61
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for secure generation of a short-term key SK for viewing information content in a Multicast-broadcast-multimedia system are described. A short-term key is generated by a memory module residing in user equipment (UE) only when the source of the information used to generate the short-term key can be validated. A short-term key can be generated by a Broadcast Access Key (BAK) or a derivative of BAK and a changing value with a Message Authentication Code (MAC) appended to the changing value. A short-term key (SK) can also be generated by using a private key and a short-term key (SK) manager with a corresponding public key distributed to the memory module residing in the user equipment (UE), using a digital signature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.