Method for providing a secure communication between two devices and application of this method
US7171553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2002 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Aug 13, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of providing a secure communication between first and second devices is described. The method includes encrypting a random key using an encryption key at a first device and transferring the encrypted random key to the second device for encryption of data communicated from the second device to the first device. The encrypted data received from the second device is decrypted using the random key. The method typically includes transferring a control word encrypted with an encryption key to the second device for decryption, and encryption using the random key. The encrypted control word received from the second device is then decrypted using the random key. The invention extends to a method of enabling a decoder, and to a decoder, to decode a data stream. It also extends, inter alia, to a method of authenticating an enabling device and to an enabling device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.