SEMICONDUCTOR DEVICE AND SECURITY SYSTEM
First Claim
1. A semiconductor device comprising:
- a unique-information generation circuit configured to operate in a plurality of operation environments to generate unique information, wherein the unique information comprises stable information and unstable information, the stable information is a constant in the plurality of operation environments, and the unstable information is different in at least two of the plurality of operation environments;
a controlling logic configured to detect the unstable information and generate code information based on the detected unstable information, wherein the code information comprises a code sequence formed by the stable information and the unstable information and identification information used to identify the unstable information of the code sequence; and
a memory portion storing the code information,wherein the controlling logic reads out the code information from the memory portion and outputs the code information to a host device, and,wherein the controlling logic is further configured to delete the code information and the identification information which are stored in the memory portion in response to a request from the host device.
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Accused Products
Abstract
A semiconductor device is provided. The semiconductor device includes a unique-information generation portion, a detection portion, a memory portion, and a readout portion. The unique-information generation portion operates in a plurality of operation environments to generate unique information. The unique information includes stable information and unstable information. The stable information is constant in the plurality of operation environments, and the unstable information is different in at least two of the plurality of operation environments. The detection portion detects the unstable information. The memory portion stores the unique information and identification information for identifying the unstable information. The readout portion reads out the unique information and the identification information and outputs the unique information and the identification information to an external portion.
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8 Claims
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1. A semiconductor device comprising:
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a unique-information generation circuit configured to operate in a plurality of operation environments to generate unique information, wherein the unique information comprises stable information and unstable information, the stable information is a constant in the plurality of operation environments, and the unstable information is different in at least two of the plurality of operation environments; a controlling logic configured to detect the unstable information and generate code information based on the detected unstable information, wherein the code information comprises a code sequence formed by the stable information and the unstable information and identification information used to identify the unstable information of the code sequence; and a memory portion storing the code information, wherein the controlling logic reads out the code information from the memory portion and outputs the code information to a host device, and, wherein the controlling logic is further configured to delete the code information and the identification information which are stored in the memory portion in response to a request from the host device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification