Proof of device genuineness
US9178881B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2013 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Jan 3, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptographic process is provided which allows a server to verify that a client device is genuine. The client device is provisioned with first and second data elements and a key which can be stored in fuses at the time of manufacture. When the client device requests digital content such as multimedia from the server, the server issues a genuineness challenge to the client device. The genuineness challenge is a message which includes a message authentication code (MAC) derived from a secret key of the server, in addition to an encrypted timestamp nonce. The client device prepares a response which includes a MAC derived from the client's key and the genuineness challenge. The response also includes the first and second data elements but not the client's key. The server processes the response to confirm that the client device is genuine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.