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US 7,690,024 B2Granted
Authenticated device and individual authentication system
AssigneeKabushiki Kaisha Toshiba
InventorsAtsuhiro Kinoshita, Kazuya Matsuzawa
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Abstract
It is made possible to prevent “spoofing” and incur no additional management cost as effectively as possible. An authenticated device includes: at least one authenticated element that generates an output signal with characteristics spontaneously varying, at the time of manufacturing, with respect to a continuous input signal. The characteristics of the authenticated element are used as information unique to an individual.
Claims10
An individual authentication system comprising:
- an authenticated device that includes at least one authenticated element that generates an output signal with characteristics spontaneously varying, at the time of manufacturing, with respect to a continuous input signal, the characteristics of the authenticated element being used as information unique to an individual;
- and
- an authenticating device that inputs a variable authentication signal as the input signal to the authenticated element of the authenticated device, and performs individual authentication on the authentication device, the authenticating device using the variable authentication signal in distinguishing the characteristics of the authenticated element.
An individual authentication system comprising:
- a first authenticated unit that includes a first array in which authenticated elements that generate output signals with characteristics spontaneously varying, at the time of manufacturing, in response to a continuous input signal, are arranged in a matrix form, and a first selecting circuit that selects at least one authenticated element from the first array;
- a second authenticated unit that includes a second array in which authenticated elements that generate output signals with characteristics spontaneously varying, at the time of manufacturing, in response to a continuous input signal, are arranged in a matrix form, and a second selecting circuit that selects at least one authenticated element from the second array;
- an operating unit that transmits a first element designating signal to the first selecting circuit to designate an authenticated element in the first array, and a second element designating signal to the second selecting circuit to designate an authenticated element in the second array, so that the authenticated elements are selected from both the first array and the second array;
- a first authentication signal generating circuit that generates and transmits a first variable authentication signal to the authenticated element selected from the first array, the first authentication signal generating circuit using the first variable authentication signal in distinguishing the characteristics of the authenticated elements in the first array;
- a second authentication signal generating circuit that generates and transmits a second variable authentication signal to the authenticated element selected from the second array, the second authentication signal generating circuit using the second variable authentication signal in distinguishing the characteristics of the authenticated elements in the second array;
- and
- a comparator circuit that compares a first output of the authenticated element selected from the first array with a second output of the authenticated element selected from the second array, the first output being made in response to the first variable authentication signal, the second output being made in response to the second variable authentication signal.
4 more elements
Dependencies are inferred from the claim text.