CN111125652B - Identity authentication system and method based on pressure touch - Google Patents

Abstract

The invention discloses an identity authentication system and method based on pressure touch. The steps of the method are: dividing touch areas and fixing numbers, collecting touch pressure change data in the touch areas, and collecting positions corresponding to touch operations Coordinates; after removing the period of unstable touch pressure in the initial stage, identify the moment with the highest touch pressure in the touch area and record it as the pressing moment, and then sort the pressing moments of each touch area to obtain the touch pressing sequence; when the sequence of touch and press is the same as the sequence of preset touch and press password, it is determined that the identity authentication is successful; if not, it is determined that the authentication fails. The present invention uses the pressure to perform identity authentication and identification on the user's pressing sequence, and can be applied to a touch screen and other pressure sensing devices that simultaneously obtain the coordinates and pressure values of multiple touch points, instead of the traditional keyboard password input or pattern password input, and the pressing method has a secretive feature. Sex, not easy to be peeped or stolen, high security.

Description

A pressure touch-based identity authentication system and method

technical field

The invention relates to the technical field of terminal identity authentication, in particular to a pressure touch-based identity authentication system and method.

Background technique

Existing identity authentication technologies, represented by unlocking, are mainly matched and verified by setting an unlocking pattern or entering a digital password. Since these methods require the user's finger to move in a large amount in space, they are easily recorded and identified by bystanders or video recording devices, and their security and confidentiality are low. There is also a small amount of verification by calculating the touch pressure value. However, it is only the verification of the touch pressure value, and its security is still insufficient. Among the touch devices that can obtain the coordinates and pressure of multiple touch points at the same time, there are also authentication methods with anti-peeping ability, such as the use of face recognition and There are two methods of fingerprint recognition for authentication and unlocking, but for face recognition and fingerprint recognition, many factors will interfere with the recognition failure. For example, wearing hats, masks, and the posture of lying on the side will interfere with the accuracy of face recognition. Wear gloves. , or wet fingers will interfere with the accuracy of fingerprint recognition.

SUMMARY OF THE INVENTION

In order to overcome the defects and deficiencies of the prior art, the present invention provides an identity authentication system and method based on pressure touch. The present invention uses the pressure to identify the user's pressing sequence, the user's pressing sequence is invisible, and only depends on the user's personal The habit of pressing, the pressing method is secret, it is not easy to be peeped or stolen, and the security is high.

In order to achieve the above object, the present invention adopts the following technical solutions:

The invention provides an identity authentication system based on pressure touch, comprising: a pressing area numbering module, a pressing data acquisition module, a feature extraction module, a sequence acquisition module and a matching authentication module;

The pressing area numbering module is used for fixedly numbering the touch pressing area;

The pressing data collection module is used to collect the touch pressure change data of the touch pressing area, and record the position coordinates corresponding to the touch operation;

The feature extraction module is used to remove the touch pressure data in the informal pressing period in the initial stage, retain the touch pressure data in the formal pressing period in the initial stage, and set the time corresponding to the maximum touch pressure value in the touch pressure data. is the pressing time;

The sequence obtaining module is configured to sort the pressing moments to obtain a touch pressing sequence, where the touch pressing sequence includes a touch pressing password sequence and a touch pressing authentication sequence;

The matching authentication module is used for matching and authenticating the touch pressing authentication sequence with the preset touch pressing password sequence.

The present invention also provides an identity authentication method based on pressure touch, comprising the following steps:

Divide the touch and press area into regions, and perform a fixed number on the divided touch and press areas;

Collect the touch pressure change data of the touch pressing area, and record the position coordinates corresponding to the touch operation;

Remove the touch pressure data in the informal pressing period in the initial stage, retain the touch pressure data in the formal pressing period in the initial stage, and set the time corresponding to the maximum touch pressure value in the touch pressure data as the pressing time;

Sort the pressing times to obtain a touch pressing sequence, where the touch pressing sequence includes a touch pressing password sequence and a touch pressing authentication sequence;

Match the touch and press authentication sequence with the touch and press password sequence for authentication. When the touch and press sequence is the same as the preset touch and press password sequence, it is determined that the password is entered correctly and the identity authentication is successful; if not, it is determined that the password is incorrect , the identity authentication is unsuccessful, and the touch and press sequence is recollected.

As a preferred technical solution, the acquisition of the touch pressing sequence adopts a method of first storing and then extracting, and the specific steps are:

Preset touch pressing password sequence: collect touch pressure change data in the touch pressing area, obtain and store a plurality of original pressing data, and set the moment corresponding to the maximum touch pressure value in the original pressing data as the preset password pressing moment , sorting and extracting the preset password pressing time to obtain the touch pressing password sequence;

Obtain the touch and press authentication sequence: collect the touch pressure change data, update the original press data to the identity authentication press data, and store it, and set the time corresponding to the maximum touch pressure value in the identity authentication press data as the identity authentication press time , sorting and extracting the identity authentication pressing times to obtain a touch pressing authentication sequence.

As a preferred technical solution, the acquisition of the touch pressing sequence adopts a method of processing while collecting, and the specific steps are:

Preset touch and press password sequence:

Collect and store the initial touch pressure data of the official pressing period, and update the touch pressure value of the current touch pressing area and the corresponding touch pressure value when the collected touch pressure value in the touch pressing area is greater than the touch pressure value at the previous moment. the preset password pressing time, update the touch pressure data repeatedly, until the preset password touch pressing operation ends, sort the preset password pressing time in each touch pressing area and set it as the touch pressing password sequence;

Get the touch and press authentication sequence:

Collect touch pressing data, when the maximum touch pressure value appears in the touch pressing area, store the touch pressure value in the current area and the corresponding authentication pressing time. After the identity authentication touch pressing operation is completed, each touch pressing The identity authentication pressing time in the area is sorted and set to the touch pressing authentication order.

As a preferred technical solution, an alarm protection step is also included, and when it is determined that the identity authentication is unsuccessful for many times, the touch operation is restricted to perform identity authentication.

As a preferred technical solution, it also includes a password complexity verification step to determine whether the password complexity meets the set security requirements, set a pressing reminder at the beginning of each round of identity authentication, and obtain the current round of pressing after the end of one round of pressing. , and combine the touch and press sequences of each round to set the final touch and press password sequence.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The present invention utilizes the feature that the pressing action range is relatively small, solves the problem that the fingers involved in the authentication methods represented by graphic passwords and digital passwords carry out large-scale spatial movement, and achieves the technology that the authentication information is not easy to be peeped or stolen. Effect.

(2) The invention is less disturbed by external factors during operation, and mainly based on the pressing action of the user, it solves the influence of fingerprint and facial recognition that are susceptible to finger hygiene, makeup and posture, etc., and achieves a more stable technology. Effect.

(3) The present invention determines the authentication information according to the change of the user's pressing force on the pressure sensing device that has the coordinates and pressure values of the multi-touch points obtained at the same time, and solves the high requirements for the device configuration of the authentication methods such as fingerprint and facial recognition, and can directly Using the existing pressure sensor functional devices on the touch screen terminal, the operation is simple and the overall configuration is simple.

(4) Compared with the existing authentication methods that mainly rely on pressure, due to the subjective control of the user's strength, it is basically only possible to distinguish between relatively light and relatively heavy cases, resulting in low complexity. The present invention adds multi-point and multi-touch to achieve The technical effect of higher password complexity and higher security is achieved.

Description of drawings

FIG. 1 is a schematic structural framework diagram of an identity authentication system based on pressure touch according to the present embodiment;

FIG. 2 is a schematic flowchart of an identity authentication method based on pressure touch according to this embodiment.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example

As shown in FIG. 1 , this embodiment provides an identity authentication system based on pressure touch, including:

Pressing area numbering module, pressing data acquisition module, feature extraction module, sequence acquisition module and matching authentication module;

In this embodiment, the pressing area numbering module is used to fix the number of the touch pressing operation area, and the pressing data collection module is used to collect the pressure change data in the touch pressing operation, and record the position coordinates corresponding to the touch operation. Before pressing, the screen is divided into five sections, and then the finger number is determined according to the section where the position coordinates are located; the feature extraction module is used to remove the period of unstable touch pressure in the initial stage, retain the pressing feature moment, and use the touch pressure in the touch area to remove the time period. The maximum time is set as the pressing time; the sequence acquisition module is used for sorting the pressing time to obtain the pressing sequence; the matching authentication module is used for matching and authenticating the touch pressing authentication sequence and the preset touch pressing password sequence;

In this embodiment, the identity authentication system based on pressure touch is further provided with a processor, a memory, a pressure sensor and a time recorder. The processor is used to implement and process data when executing the program, and the memory is used to store the program and Data, even if the existing touch screens are of different types, can locate the touch position in different ways and respond to XY coordinates, and the time is obtained from the time recorder by using the system function.

As shown in FIG. 2 , this embodiment provides an identity authentication method based on pressure touch, including the following steps:

S1: Divide the touch area into n non-overlapping finger areas and fix the coding. The number of areas can be adjusted according to the size of the device and user habits. The center of each finger area corresponds to the finger when a finger is placed naturally. Point position, the authentication system obtains the position and pressure value of all touch points at a specific time from the touch device through cyclic scanning;

The touch-control device in this embodiment may also adopt a device with a display function (such as a touch screen), and display a specific mark such as a circle in the finger area to prompt the user where the finger should be pressed;

The reason why the finger pressing area is fixedly numbered in this embodiment is that it is assumed that the user presses with three fingers: the index finger, the middle finger, and the ring finger. If the numbers are not fixed, the serial numbers of the three fingers will be randomly generated. When the password is set, the index finger is assigned the serial number of 1. The middle finger is assigned a serial number of 2, the ring finger is assigned a serial number of 3, and when identity authentication is required after successful setting, the index finger is assigned a serial number of 3, the middle finger is assigned a serial number of 1, and the ring finger is assigned a serial number of 2. In this way, Even if the user presses in the order of the index finger, the middle finger, and the ring finger twice, the obtained pressing order is 123 or 312, which are two completely different situations, resulting in authentication failure. Therefore, it is necessary to fix the number of the pressing area of each finger to avoid this kind of situation. Happening;

In this embodiment, the specific implementation of the fixed numbering of the finger pressing area is: if the user chooses to use n fingers to press, the touch area is automatically divided according to the coordinate value and the divided area is visible, and then the area is ordered according to the order. Fixed numbering, each part is fixedly numbered 1, 2, 3... In this way, the finger that presses in part 1 is automatically numbered 1, the finger that presses in part 2 is automatically numbered 2... and so on, in this way, whenever , as long as the area of the screen corresponding to the finger remains unchanged, the number of each finger is always fixed, and which area the finger is located in is determined by the finger coordinate information collected by the pressing data acquisition module;

S2: The process of inputting the pressing password sequence is as follows: the identity authentication system prompts to place n fingers in the center of their respective finger areas at the same time, and the identity authentication system prompts the user to maintain the posture and wait from the moment it detects that the user's last finger touches the device A short period of time (such as 2 seconds) is used to eliminate the influence of the unstable pressure signal at the initial stage. After waiting, the user is prompted to start pressing formally. Each finger area must be pressed only once, and the pressing sequence is determined by the user (ie Press the password sequence), when the system detects that all finger areas have been pressed once, it prompts the user to end the current round of pressing the password input;

In this embodiment, since the finger does not leave the touch screen in the whole pressing process, the pressure of each finger always exists, and because the user's force habits are different, it is impossible to determine whether to press by setting a fixed pressure difference. After several rounds of experiments In the test, the pressure when the same finger is pressed will be higher than its pressure in other states (the pressure in the non-pressing state or the linkage pressure when other fingers are pressed), and the waveform of the pressure of the finger changes with time is very unstable, mainly There are three interferences. First, in the stage when the finger just touches the device but has not yet started to press the device, the pressure sensing data is unstable, and it is easy to cause that the touch pressure in the stage where the official pressing is not started is higher than the maximum pressure value in the formal pressing stage; There is linkage between fingers. When one finger is pressed, it will cause another finger to exert force, so that it is impossible to simply use the finger with the most pressure at a certain moment as the finger to be pressed at this moment, and it will also interfere with the final pressure waveform. The third is that different users will generate a series of interference waveforms in the specific use process. By removing the period of unstable touch pressure in the initial stage, and finding the moment when the pressure of each finger is the greatest as the pressing moment, the instability of the initial pressure signal can be ruled out. The influence of , avoids the influence of finger linkage;

In this embodiment, after the formal pressing phase ends, the system sets the moment of maximum pressure in each finger area as the pressing moment of the area, and then sorts the pressing moment of each finger area in chronological order to obtain the pressing password sequence;

S3: The process for the user to use the system to set a pressing password is as follows: the system prompts the user to set a password, and after the user completes the input of the password according to step S2, the system stores the obtained pressing sequence as a preset password;

In this embodiment, there are two working modes for acquiring the touch pressing sequence. In the first working mode, when acquiring the pressing sequence, the information of finger pressing is first stored and then retrieved. The steps include: detecting a round of touch pressing After the operation, a plurality of pressing data is obtained, the pressing data is stored in the pressing data unit, and the touch pressing sequence is obtained after data processing and extraction, which is the preset touch pressing password sequence, and then subsequent touch pressing operations are detected, Update the pressing data in the pressing data unit, obtain the touch pressing sequence after extraction, and set it as the current touch pressing authentication sequence;

When setting the password, when obtaining the pressing sequence, the information of the finger pressing is first stored and then retrieved, and all the finger data of one round of pressing are first stored in the data storage unit, assuming that they are stored in the "finger data file" (hereinafter referred to as "" "Finger data file" instead of the data storage unit, which is easy to understand), and then call the "finger data file" to extract the pressing features and obtain the sequence. In the same way, the “finger data file” will be overwritten by the finger data generated by the new pressing, and the new “finger data file” will be called to extract the pressing features and obtain the pressing sequence. After obtaining the pressing sequence, save the data. A sequence, assumed to be saved as a "decoding sequence file". When re-authenticating, in the same way, the new data overwrites the "finger data file", the new sequence overwrites the "decoding sequence file", and when the password is reset, in the same way, the new data overwrites the "finger data file" , the new sequence overwrites the "password sequence file", and outputs the "password sequence file" and "decoding sequence file" to the matching authentication module each time authentication is performed;

The second working mode is: changing the data storage and retrieval in the first working mode to processing while collecting, in one round of touch and pressing operation, the first data collected is stored in the data unit as the initial value, When the touch pressure in a certain touch area is greater than the pressure at the previous time, the time and pressure in the data in the original data unit are updated to the pressing time and pressure of the current area. When all finger areas cannot be detected When the pressure value is reached, it is regarded as the end of the touch pressing operation, and then the pressing time sequence of each area is set to the preset touch pressing password sequence. In a new round of touch pressing operation, when the touch pressure appears in the touch area When the maximum value is reached, it is saved as the pressing time of the current area. After the touch pressing operation is completed, the pressing time sequence of each area is set to the touch pressing sequence, that is, the authentication password;

While the pressing data acquisition module, pressing area numbering module, and sequential acquisition module are collecting and processing data for each finger, when the pressure value reaches a new maximum value, the moment is saved, and other non-maximum pressure value moments are saved. The relevant data (time, coordinates, pressure, etc.) of the digitizer are deleted directly. After the finger press is completed, compare the moments saved by each finger to obtain the sequence. The sequence is equivalent to the first method according to the "password sequence" and "decoding sequence". Save it, delete other finger data completely, and output two files of "password sequence" and "decoding sequence" to the matching authentication module each time of authentication;

S4: The identity authentication process of the system is as follows: first repeat the steps of S2 to obtain the sequence of this touch and press operation, then read the pressure password sequence preset by the user from the data storage unit, and compare the password sequence obtained this time with S3 The sequence of the passwords stored in the steps is compared. When the sequence of touch and press is the same as the sequence of the preset touch and press password, it is determined that the password is entered correctly and the identity authentication is successful; Capture the touch press sequence.

In this embodiment, an alarm protection step is also provided, and when it is determined that the identity authentication is unsuccessful for many times, the touch operation is restricted to perform identity authentication.

In this embodiment, a password complexity verification step is also provided. Whether the password complexity is sufficient is judged according to the user's different requirements for device security. A reminder press is set at the beginning of each round. After one round of pressing, the sequence of pressing of this round can be obtained. After each round of pressing is subjected to feature extraction and sequence acquisition, the obtained pressing sequence is merged to form this pressing sequence. .

The identity authentication method based on pressure touch in this embodiment uses several fingers to touch the screen. When the fingers do not leave the screen, the user presses the screen in a certain order according to his own subjective wishes to identify and record the pressing order. , and use it as a password for subsequent identification of the user. When using this method, the user and the people around him can only see that the finger touches the screen and the position is fixed. Pressing the screen hard, it has the corresponding anti-peeping ability.

In this embodiment, the pressure is used to identify the user's pressing sequence. When pressing, the user's finger does not leave the touch screen and the finger position does not move, and the user's pressing sequence is not visible. The user presses the screen according to the subjective will, so as to match the pressing sequence and complete the identity authentication. .

The above-mentioned embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, The simplification should be equivalent replacement manners, which are all included in the protection scope of the present invention.

Claims (6)

1. An identity authentication system based on pressure touch, comprising: the device comprises a pressing region numbering module, a pressing data acquisition module, a feature extraction module, a sequence acquisition module and a matching authentication module;

the pressing area numbering module is used for fixedly numbering the touch pressing areas;

the pressing data acquisition module is used for acquiring touch pressure change data of a touch pressing area and recording position coordinates corresponding to touch operation, and fingers do not leave the touch pressing area in the whole touch pressing process;

the characteristic extraction module is used for removing the touch pressure data in an informal pressing time period in an initial stage, reserving the touch pressure data in a formal pressing time period in the initial stage, and setting the moment corresponding to the maximum touch pressure value in the touch pressure data as a pressing moment;

the sequence acquisition module is used for sequencing the pressing moments to obtain a touch pressing sequence, and the touch pressing sequence comprises a touch pressing password sequence and a touch pressing authentication sequence;

the matching authentication module is used for matching and authenticating the touch pressing authentication sequence and a preset touch pressing password sequence.

2. An identity authentication method based on pressure touch is characterized by comprising the following steps:

performing area division on the touch pressing area, and fixedly numbering the divided touch pressing areas;

acquiring touch pressure change data of a touch pressing area, and recording position coordinates corresponding to touch operation, wherein fingers do not leave the touch pressing area in the whole touch pressing process;

removing the touch pressure data of the informal pressing time period in the initial stage, reserving the touch pressure data of the formal pressing time period in the initial stage, and setting the time corresponding to the maximum touch pressure value in the touch pressure data as the pressing time;

sequencing the pressing moments to obtain a touch pressing sequence, wherein the touch pressing sequence comprises a touch pressing password sequence and a touch pressing authentication sequence;

matching and authenticating the touch pressing authentication sequence and the touch pressing password sequence, and judging that the password is input correctly and the identity authentication is successful when the touch pressing sequence is the same as the preset touch pressing password sequence; if not, the password is judged to be wrong, the identity authentication is unsuccessful, and the touch pressing sequence is collected again.

3. The identity authentication method based on pressure touch as claimed in claim 2, wherein the obtaining of the touch pressing sequence adopts a way of storing before extracting, and the specific steps are as follows:

presetting a touch pressing password sequence: acquiring touch pressure change data of a touch pressing area, obtaining and storing a plurality of original pressing data, setting a moment corresponding to the maximum touch pressure value in the original pressing data as a preset password pressing moment, and sequencing and extracting the preset password pressing moment to obtain a touch pressing password sequence;

acquiring a touch pressing authentication sequence: and acquiring touch pressure change data, updating the original pressing data into identity authentication pressing data, storing the identity authentication pressing data, setting the moment corresponding to the maximum touch pressure value in the identity authentication pressing data as an identity authentication pressing moment, and sequencing and extracting the identity authentication pressing moments to obtain a touch pressing authentication sequence.

4. The identity authentication method based on pressure touch as claimed in claim 2, wherein the acquiring of the touch pressing sequence adopts a manner of collecting and processing simultaneously, and the specific steps are as follows:

presetting a touch pressing password sequence:

acquiring and storing initial touch pressure data of a formal pressing time period, updating a touch pressure value of a current touch pressing area and a corresponding preset password pressing time when the acquired touch pressure value of the touch pressing area is greater than a touch pressure value at a previous time, repeatedly updating the touch pressure data until the preset password touch pressing operation is finished, sequencing the preset password pressing times in each touch pressing area, and setting a touch pressing password sequence;

acquiring a touch pressing authentication sequence:

the method comprises the steps of collecting touch pressing data, storing the touch pressure value of the current area and the corresponding identity authentication pressing time when the maximum touch pressure value appears in the touch pressing area, and sequencing the identity authentication pressing time in each touch pressing area after the identity authentication touch pressing operation is finished, and setting the sequence as a touch pressing authentication sequence.

5. The pressure touch-based identity authentication method according to any one of claims 2 to 4, further comprising an alarm protection step of limiting touch operation for identity authentication when the identity authentication is determined to be unsuccessful for a plurality of times.

6. The identity authentication method based on pressure touch according to any one of claims 2 to 4, further comprising a password complexity verification step of judging whether the password complexity meets a set security requirement, setting a press prompt when each round of identity authentication starts, obtaining a current press sequence after one round of press is finished, merging the touch press sequences of each round, and setting the merged sequence as a final touch press password sequence.

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