发明申请
- 专利标题: DEVICE AND METHOD FOR SECURING SOFTWARE
- 专利标题(中): 用于安全软件的设备和方法
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申请号: US11993811申请日: 2005-06-22
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公开(公告)号: US20090172414A1公开(公告)日: 2009-07-02
- 发明人: Odi Dahan , Ori Goren , Yehuda Shvager
- 申请人: Odi Dahan , Ori Goren , Yehuda Shvager
- 申请人地址: US TX Austin
- 专利权人: Freescale Semiconductor, Inc.
- 当前专利权人: Freescale Semiconductor, Inc.
- 当前专利权人地址: US TX Austin
- 国际申请: PCT/IB05/52051 WO 20050622
- 主分类号: G06F21/00
- IPC分类号: G06F21/00 ; G06F12/14 ; G06F11/00 ; H04L9/06
摘要:
A device that includes a first memory unit adapted to store encrypted instructions, a processor adapted to execute decrypted instructions, a second memory unit accessible by the processor, and a decryption unit. The device is characterized by including a key database and a key selection circuit, wherein the key selection circuit is adapted to select a selected decryption key from the key database for decrypting encrypted instructions. The selection is responsive to a fixed selection information stored within the integrated circuit and to received key selection information.A method that includes a stage of receiving encrypted instructions; and executing decrypted instructions by a processor. The method is characterized by receiving key selection information, selecting a selected decryption key out of a key database in response to fixed selection information and to the received key selection information, and decrypting encrypted instructions using the selected decryption key.
公开/授权文献
- US08397081B2 Device and method for securing software 公开/授权日:2013-03-12