Transport packet decryption testing in a client device
US8374338B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2010 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Dec 28, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a method for testing a transport packet decrypting module of a client device, a first decryption operation of the transport packet decrypting module is implemented on a test encrypted control word using a content decryption key ladder to derive a test control word, a second decryption operation of the transport packet decrypting module is implemented on one or more test transport packets using the test control word via a predetermined content decryption algorithm, the KIV is derived from the decrypted transport packets, and the derived KIV is compared with a value stored in the client device to verify whether the transport packet decrypting module of the client device is functioning properly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.