Portable secure element
US8625800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2013 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Feb 25, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Transferring control of a secure element between TSMs comprises a zone master key established between the TSMs that facilitates encryption of a temporary key. The TSMs create the zone master key prior to initiation of transfer of control. Once transfer of control is initiated, the first TSM establishes a communication channel and deletes its key from the secure element. The first TSM creates a temporary key that is encrypted with the zone master key established between the first TSM and the second TSM. The encrypted temporary key is communicated to the second TSM with a device identifier. The second TSM decrypts the temporary key using the zone master key and identifies the user device using the device identifier. The new TSM establishes a communication channel and deletes the temporary key from the secure element. The new TSM then inputs and saves its key into the secure element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.