Invention Grant
- Patent Title: Portable secure element
- Patent Title (中): 便携式安全元件
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Application No.: US13523637Application Date: 2012-06-14
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Publication No.: US08385553B1Publication Date: 2013-02-26
- Inventor: Sarel Kobus Jooste , John Joseph , Shane Alexander Farmer
- Applicant: Sarel Kobus Jooste , John Joseph , Shane Alexander Farmer
- Applicant Address: US CA Mountain View
- Assignee: Google Inc.
- Current Assignee: Google Inc.
- Current Assignee Address: US CA Mountain View
- Agency: Johnson, Marcou & Isaacs, LLC
- Main IPC: H04L9/00
- IPC: H04L9/00 ; H04L9/32

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.
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