CN112699358A - Password safety arrangement based on fingerprint sensor - Google Patents
Password safety arrangement based on fingerprint sensor Download PDFInfo
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- CN112699358A CN112699358A CN202011642487.5A CN202011642487A CN112699358A CN 112699358 A CN112699358 A CN 112699358A CN 202011642487 A CN202011642487 A CN 202011642487A CN 112699358 A CN112699358 A CN 112699358A
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Abstract
The invention discloses a password safety protection device based on a fingerprint sensor, which comprises the fingerprint sensor and a fingerprint input module, wherein the fingerprint sensor is connected with a single chip microcomputer through an analog-to-digital converter, an encryption module and the other analog-to-digital converter in sequence, the fingerprint input module is electrically connected with the single chip microcomputer through the other analog-to-digital converter, and the single chip microcomputer is electrically connected with a display. The invention also provides a corresponding use method, which comprises the steps that the fingerprint input module acquires the fingerprint of the user and converts the fingerprint into electric signal data; and converting the electric signal data into corresponding numbers through an analog-to-digital converter, and performing normalization processing. The invention can solve the problems that the password is easy to steal and the key-press experience is poor in the prior art, and has high efficiency, strong accuracy and good safety.
Description
Technical Field
The invention relates to the technical field of insurance unlocking, in particular to a password safety protection device based on a fingerprint sensor.
Background
At present, the ATM inputs the password through keys, but some lawbreakers install special equipment on the ATM to obtain the user password, and usually install a micro camera above a keyboard to obtain the bank card password of the user.
The main problems of the current key input password include: the key experience is not good, the button material is hard, and the input error is easy; some illegal activities of theft and fraud using automated teller machines often occur.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the password safety protection device based on the fingerprint sensor, which can solve the problems that the password is easy to steal and the key-press experience is poor in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a password security device based on fingerprint sensor is provided, which comprises
Fingerprint sensor and fingerprint input module, fingerprint sensor loops through adc, encryption module and singlechip and is connected, and fingerprint input module is connected with the singlechip electricity through another adc, and the singlechip is connected with the display electricity.
The invention also provides a use method based on the password safety protection device, which comprises the following steps:
s1, the fingerprint input module acquires a user fingerprint and converts the fingerprint into electric signal data;
s2, converting the electric signal data into corresponding numbers through an analog-to-digital converter, and carrying out normalization processing;
and S3, comparing the normalized number with the number converted from the password stored in the singlechip, finishing authentication when the numbers are the same, or displaying that the password is wrong.
The password safety protection device based on the fingerprint sensor provided by the invention has the main beneficial effects that:
the invention has higher security, and the password corresponding to the fingerprint set by the user can be known only by the client, so that the user does not worry about the leakage of the password even if the user is taken by the illegally installed camera in the password inputting process. The security is higher compared to today's key entry technology. The input mode of the fingerprint also optimizes the operation experience.
Drawings
Fig. 1 is a schematic structural diagram of a password security protection device based on a fingerprint sensor.
FIG. 2 is a flow chart of a method of using a fingerprint sensor based password security device.
The fingerprint input device comprises a fingerprint sensor 1, a fingerprint sensor 2, an analog-to-digital converter 3, an encryption module 4, a fingerprint input module 5, an analog-to-digital converter 6, a keyboard 7, a display 8 and a single chip microcomputer.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
fig. 1 is a flow chart of the password security device based on fingerprint sensor according to the present invention.
The password safety protection device based on the fingerprint sensor comprises a fingerprint sensor 1 and a fingerprint input module 4, wherein the fingerprint sensor 1 is connected with a singlechip 8 through an analog-to-digital converter 2 and an encryption module 3 in sequence. The fingerprint input module 4 is electrically connected with the single chip microcomputer 8 through another analog-to-digital converter 5, and the single chip microcomputer 8 is electrically connected with the display 7.
The single chip microcomputer 7 is electrically connected with the keyboard 6 to deal with the condition that the fingerprint sensor 1 cannot be used.
Analog-to-digital converter 2 and analog-to-digital converter 5 are each a/D converters of type 7135. The model of the singlechip 8 is 8051.
Preferably, the fingerprint sensor 1 and the fingerprint input module 4 have the same structure and are respectively used for setting passwords and inputting the passwords.
The invention also provides a use method of the password security protection device based on the fingerprint sensor, which is characterized by comprising the following steps as shown in figure 2:
and S1, the fingerprint input module 4 acquires the fingerprint of the user and converts the fingerprint into electric signal data.
And S2, converting the electric signal data into corresponding numbers through the analog-to-digital converter 5, and carrying out normalization processing.
Wherein, the number after normalization processing is nine digits.
And S3, comparing the normalized number with the number converted from the password stored in the singlechip 8, finishing authentication when the numbers are the same, or displaying that the password is wrong.
Further, the password stored in the single chip microcomputer 8 is obtained by the following steps:
s3-1, the fingerprint sensor 1 acquires a user' S fingerprint and converts the fingerprint into electrical signal data.
And S3-2, converting the electric signal data into corresponding numbers through the analog-to-digital converter 2, and carrying out normalization processing.
And S3-3, carrying out encryption processing on the normalized number to obtain an encrypted number.
Specifically, the encryption algorithm is as follows:
array for the ith fingerprint transform is xijWherein, i is 1,2, … …,6, j is 1,2, … …, 9; the encrypted array is XijThe following relationships are present:
Xij＝xij+j。
and S3-4, storing the encrypted numbers in the singlechip 8 to obtain the password stored in the singlechip 8.
Further, the comparison method comprises the following steps:
the array of user fingerprint information converted by the analog-to-digital converter 5 is YijWhen the condition is satisfied: xij＝YijWhen the test is passed, the test is passed.
The above description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
Claims (10)
1. The password safety protection device based on the fingerprint sensor is characterized by comprising the fingerprint sensor and a fingerprint input module, wherein the fingerprint sensor is connected with a single chip microcomputer through an analog-to-digital converter, an encryption module and another analog-to-digital converter in sequence, the fingerprint input module is electrically connected with the single chip microcomputer through another analog-to-digital converter, and the single chip microcomputer is electrically connected with a display.
2. The password security protection device based on the fingerprint sensor of claim 1, wherein the single chip microcomputer is electrically connected with a keyboard.
3. The fingerprint sensor based password security device of claim 2, wherein the analog-to-digital converters are model 7135 a/D converters.
4. The password security protection device based on the fingerprint sensor of claim 3, wherein the type of the single chip microcomputer is 8051.
5. The fingerprint sensor-based password security device of claim 1, wherein the fingerprint sensor and the fingerprint entry module are identical in structure.
6. Use of a cryptographic security device based on a fingerprint sensor according to any of claims 1 to 5, characterized in that it comprises the following steps:
s1, the fingerprint input module acquires a user fingerprint and converts the fingerprint into electric signal data;
s2, converting the electric signal data into corresponding numbers through an analog-to-digital converter, and carrying out normalization processing;
and S3, comparing the normalized number with the number converted from the password stored in the singlechip, finishing authentication when the numbers are the same, or displaying that the password is wrong.
7. The use method of the password security protection device based on the fingerprint sensor as claimed in claim 6, wherein the password stored in the single chip microcomputer is obtained by the following steps:
s3-1, acquiring a user fingerprint by a fingerprint sensor, and converting the fingerprint into electric signal data;
s3-2, converting the electric signal data into corresponding numbers through an analog-to-digital converter, and carrying out normalization processing;
s3-3, carrying out encryption processing on the normalized number to obtain an encrypted number;
and S3-4, storing the encrypted numbers in the singlechip to obtain the password stored in the singlechip.
8. The method of claim 7, wherein the normalized number is a nine-digit number.
9. The method for using the fingerprint sensor based password security protection device according to claim 7, wherein the encryption algorithm is:
array for the ith fingerprint transform is xijWherein, i is 1,2, … …,6, j is 1,2, … …, 9; the encrypted array is XijThe following relationships are present:
Xij＝xij+j。
10. the fingerprint sensor based password security protection device of claim 9, wherein the comparison method is:
the user fingerprint information array converted by the analog-to-digital converter is YijWhen the condition is satisfied:
Xij＝Yijwhen the test is passed, the test is passed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011642487.5A CN112699358B (en) | 2020-12-31 | 2020-12-31 | Application method of password safety protection device based on fingerprint sensor |
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| CN202011642487.5A CN112699358B (en) | 2020-12-31 | 2020-12-31 | Application method of password safety protection device based on fingerprint sensor |
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| CN112699358A true CN112699358A (en) | 2021-04-23 |
| CN112699358B CN112699358B (en) | 2023-10-03 |
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