Information security – Prevention of unauthorized use of data including prevention... – Access control
Reexamination Certificate
2007-09-04
2007-09-04
Jung, David Y. (Department: 2134)
Information security
Prevention of unauthorized use of data including prevention...
Access control
C713S194000
Reexamination Certificate
active
10100462
ABSTRACT:
The invention relates to an integrated circuit (IC), and more particularly to security to protect an IC (10) against unauthorized accesses. In one embodiment, an identifier is provided external to IC10. A corresponding input IC security key (52) is then provided to IC10and compared to a stored IC security key (30). If the input IC security key (52) and the stored IC security key (30) do not match, access to protected functional circuitry (12) is prohibited. The present invention may use any debug interface, including standard debug interfaces using the JTAG 1149.1 interface defined by the IEEE.
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Fitzsimmons Michael D.
Moyer William C.
Chiu Joanna G.
Freescale Semiconductor Inc.
Hill Susan C.
Jung David Y.
Nalven Andrew L
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