A device and method for authenticating IC cards
A technology of authenticity and card number, applied in the field of devices to identify the authenticity of IC cards, can solve problems such as hidden dangers of life and property safety, and achieve the effects of improving security, high reliability, and difficulty in cracking
Active Publication Date: 2020-01-21
SHAANXI UNIV OF SCI & TECH
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- Description
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- Application Information
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Problems solved by technology
However, nowadays, some criminals copy IC cards by special means, and use the copied cards to carry out illegal activities, which has caused huge safety hazards to people's lives and property safety.
Method used
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Embodiment Construction
[0024] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0025] like figure 1 As shown, a device for discriminating the authenticity of an IC card includes an IC card reader-writer 5, and the IC card reader-writer 5 is connected to the main control board 3; The input terminal of the bridge rectifier circuit 2 is connected with the output terminal of the tiny voltage amplifier 1, and the output terminal of the bridge rectifier circuit 2 is connected with the main control board 3. The main control board 3 is connected with the LCD display screen 4, and when the card is swiped, the authenticity result of the IC card is displayed. The IC card reader / writer 5 is provided with a card slot at the antenna position to ensure that the relative position between the IC card and the card reader is fixed each time the card is read. The main control board 3 can perform AD conversion on the voltage signal output by...
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The invention provides an IC card authenticity authenticating device and method. The method comprises the steps that an IC card reader and a main control board are connected, so as to control information exchange between the main control board and IC card, namely card swiping; a tiny voltage amplifier is connected with the antenna receiving end of the IC card reader to amplify an alternating voltage signal received by an antenna; a bridge rectifier circuit is responsible for converting the amplified alternating signal into a direct current voltage signal; when a new card is swiped for the first time, the main control board acquires the direct current voltage signal output by the bridge rectifier circuit and carries out AD conversion; an acquired value is processed to remove common mode interference, is recorded as dimensionless IC card excitation voltage, is associated with the IC card number, and is stored to a background database through a network; and when the card is swiped later, if the card number and the excitation voltage do not match information stored by the database, the cars is determined as a pseudo-card. According to the invention, an excitation voltage signal produced by each IC card on the card reader antenna is acquired, quantified, recorded and stored, and a pseudo-card is effectively authenticated.
Description
technical field [0001] The invention belongs to the technical field of electronic security and radio frequency identification, and in particular relates to a device and method for authenticating an IC card. Background technique [0002] IC cards are widely used in all walks of life in society, such as campus cards, access control cards, elevator cards, and bank cards. But nowadays, some criminals copy IC cards by special means, and use the copied cards to carry out illegal activities, which has caused huge potential safety hazards to people's lives and property safety. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a device and method for authenticating IC cards, which can identify original cards and duplicate cards, and has the characteristics of high reliability and wide application range. [0004] In order to achieve the above object, the technical scheme adopt...
Claims
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IPC IPC(8): G06K7/10G01R19/25
CPCG01R19/2503G06K7/10316
Inventor 张开生王小瑞
Owner SHAANXI UNIV OF SCI & TECH