Method and system for preventing revocation denial of service attacks
US9461825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2007 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | Aug 12, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and systems for preventing revocation denial of service attacks are disclosed and may include receiving and decrypting a command for revoking a secure key utilizing a hidden key, and revoking the secure key upon successful verification of a signature. The command may comprise a key ID that is unique to a specific set-top box. A key corresponding to the command for revoking the secure key may be stored in a one-time programmable memory, compared to a reference, and the security key may be revoked based on the comparison. The command for revoking the secure key may be parsed from a transport stream utilizing a hardware parser. The method and system may also comprise generating a command for revoking a secure key. The command may be encrypted and signed utilizing a hidden key and may comprise a key ID that is unique to a specific set-top box.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.