Method for preventing the use of a cloned user unit communicating with a server
US8364960B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2010 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Feb 26, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method to fight against cloning attacks is disclosed. In an initialization phase, the user unit sends to the server a request comprising a unique identifier of the user unit, check data, an initial payload key and a request instruction encrypted with a payload key retrieved from a memory of the user unit. Each time the server receives a request; the request instruction is decrypted by a payload key retrieved from a memory according to the unique identifier of the user unit. The server then generates a derivation key to be used by the user unit to compute a new payload key and checks in the next incoming request from the same user unit if the payload key is an expected one. The server detects cloning attacks thanks to a status parameter at decryption of the request instruction with the expected payload key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.