SEMICONDUCTOR DEVICE AND SECURITY SYSTEM
First Claim
1. A security system comprising:
- 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
a memory portion storing the unique information and identification information for identifying the unstable information, wherein the controlling logic reads out the unique information and the identification information stored in the memory portion and outputs the unique information and the identification information; and
a host device, coupled to the semiconductor device, comprising;
a storage portion storing the unique information and the identification information received from the memory portion of the semiconductor device;
an information receiving portion receiving the unique information from the unique-information generation circuit of the semiconductor device; and
an authentication portion comparing the stable information of the unique information stored in the storage portion with the stable information of the unique information obtained from the information receiving portion to authenticate the semiconductor 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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9 Claims
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1. A security system comprising:
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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 a memory portion storing the unique information and identification information for identifying the unstable information, wherein the controlling logic reads out the unique information and the identification information stored in the memory portion and outputs the unique information and the identification information; and a host device, coupled to the semiconductor device, comprising; a storage portion storing the unique information and the identification information received from the memory portion of the semiconductor device; an information receiving portion receiving the unique information from the unique-information generation circuit of the semiconductor device; and an authentication portion comparing the stable information of the unique information stored in the storage portion with the stable information of the unique information obtained from the information receiving portion to authenticate the semiconductor device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification