CN104036176B - Method, authentication method and terminal device based on level of security registered fingerprint characteristic point - Google Patents

Abstract

The present application relates to a method for registering fingerprint feature points based on a security level, an authentication method and a terminal device. A method for registering fingerprint feature points based on a security level includes: dividing multiple security levels, the multiple security levels include a basic security level and at least one security level with a higher security level, and each security level corresponds to one or more Fingerprint feature points; collecting the user's fingerprint, extracting a plurality of fingerprint feature points; selecting a predetermined number and corresponding type of feature points from the plurality of fingerprint feature points based on the security level, and registering them as fingerprint feature points of the corresponding security level.

Description

Method for registering fingerprint feature points based on security level, authentication method and terminal device

technical field

The present disclosure relates to fingerprint identification, in particular, to a method for registering fingerprint feature points based on a security level, an authentication method, and a terminal device.

Background technique

Certain biometric features of the human body (such as fingerprints/palmprints) are unique to the human body, and their complexity can provide a sufficient number of features for identification.

Fingerprint/palmprint and other identification technologies are currently the most mature and cheap biometric identification technologies. Fingerprint identification technology has been widely used. Not only can we see fingerprint recognition technology in access control and attendance systems, but there are more fingerprint recognition applications in the market: such as laptops, mobile phones, cars, and bank payments can all apply fingerprint recognition technology. Especially with the continuous development of smart phones, there will be a large number of demands related to fingerprint identification, such as using fingerprint identification to unlock mobile phones, protect private information, and ensure transaction security.

With the development of mobile devices and the Internet, people increasingly need to conduct transaction processing through the network, such as business payment or perform some application operations that require certain permissions. Traditionally, these activities requiring permissions and/or authentication have relied on usernames and passwords, or via USB keys, etc. The traditional methods either have a low level of security, or are complex in operation and poor in usability.

Biometric identification technology, such as fingerprint identification technology, has the advantages of safety and convenience, and is the direction of future development.

Therefore, it is necessary to develop a series of technologies and applications related to fingerprint identification technology.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is already known in the art to a person of ordinary skill in the art.

Contents of the invention

The present application discloses a method for selecting fingerprint feature points based on a security level, an authentication method and a terminal device.

Other features and advantages of the present disclosure will become apparent from the following detailed description, or in part, be learned by practice of the present disclosure.

According to one aspect of the present disclosure, there is provided a method for registering fingerprint feature points based on a security level, including: dividing multiple security levels, the multiple security levels include a basic security level and at least one security level with a higher security level, each Each security level corresponds to one or more fingerprint feature points; collect the fingerprint of the user, and extract a plurality of fingerprint feature points; select a predetermined number and corresponding type of feature points from the plurality of fingerprint feature points based on the security level, and register as corresponding Security-level fingerprint feature points.

According to some embodiments, the fingerprint feature points corresponding to the basic security level include bifurcation points and/or termination points; the fingerprint feature points corresponding to at least one security level with a higher security level include branch points, isolated points, One or more of ring point and short grain.

According to some embodiments, when a sufficient number of fingerprint feature points for the basic security level cannot be selected from the plurality of fingerprint feature points, the fingerprint feature points corresponding to the security level of a higher security level are selected sequentially, until When the predetermined number is reached; when a sufficient number of fingerprint feature points for one of the higher security levels of the at least one security level cannot be selected from the plurality of fingerprint feature points, supplementary selection and a lower security level are sequentially selected. The fingerprint feature points corresponding to the security level of the level until the predetermined number is reached.

According to another aspect of the present disclosure, an authentication method based on a security level is provided, including: identifying a user's operation and determining the security level of the operation; collecting the user's fingerprint; and extracting a plurality of fingerprint feature points based on the security level , the security level is one of a plurality of security levels, and each security level corresponds to a predetermined number of one or more fingerprint feature points; based on the security level, the extracted multiple fingerprint feature points are combined with the corresponding security Compared with the fingerprint feature points of each level, if they match, it is confirmed that the user has passed the authentication for performing the operation.

According to some embodiments, the plurality of security levels includes a basic security level and at least one security level with a higher security level.

According to some embodiments, the fingerprint feature points corresponding to the basic security level include bifurcation points and/or termination points; the fingerprint feature points of the at least one security level with a higher security level include bifurcation points, isolated points, and ring points in sequence. One or more of dots and short stripes.

According to some embodiments, when a sufficient number of fingerprint feature points for the basic security level cannot be extracted, sequentially supplementary extraction of all fingerprint feature points corresponding to a security level with a higher security level until the predetermined number is reached or exceeded; When a sufficient number of fingerprint feature points for one of the higher security levels of the at least one security level cannot be extracted, all fingerprint feature points corresponding to the security level of a lower security level are sequentially supplemented until reaching or exceeding said predetermined quantity.

According to another aspect of the present disclosure, a terminal device is provided, including: a security level division module configured to divide multiple security levels, the multiple security levels include a basic security level and at least one security level with a higher security level, Each security level corresponds to a predetermined number of one or more fingerprint feature points; the fingerprint collection module is used to collect the user's fingerprint; the feature point extraction module is used to extract a plurality of fingerprint feature points from the collected fingerprints for performing Registration operation or authentication operation; registration module, used to perform registration operation, configured to select a predetermined number and corresponding types of feature points from the plurality of fingerprint feature points based on the security level, and register as fingerprint feature points of the corresponding security level; authentication A module, configured to perform an authentication operation, configured to compare the extracted multiple fingerprint feature points with the pre-stored fingerprint feature points of the corresponding security level based on the security level, and if they match, confirm that the user has passed the authentication; and store The module is used to provide a storage function for at least one of the security class division module, the fingerprint collection module, the feature point extraction module, the registration module and the authentication module.

According to some embodiments, the fingerprint feature points corresponding to the basic security level include bifurcation points and/or termination points; the fingerprint feature points corresponding to at least one security level with a higher security level include branch points, isolated points, One or more of ring point and short grain.

According to some embodiments, when used for a registration operation, the feature point extraction module is configured to: when a sufficient number of fingerprint feature points for the basic security level cannot be selected from the plurality of fingerprint feature points, sequentially Supplementary selection of fingerprint feature points corresponding to a security level with a higher security level until the predetermined number is reached; When the fingerprint feature points of one of the security levels are selected, the fingerprint feature points corresponding to the security level of a lower security level are selected sequentially until the predetermined number is reached.

According to some embodiments, when used for authentication operations, the feature point extraction module is configured to: when a sufficient number of fingerprint feature points for the basic security level cannot be extracted, sequentially supplementary extraction and a security level of a higher security level All the corresponding fingerprint feature points until reaching or exceeding the predetermined number; when a sufficient number of fingerprint feature points for one of the at least one security level with a higher security level cannot be extracted, supplementary extraction and one lower All the fingerprint feature points corresponding to the security level of the security level reach or exceed the predetermined number.

According to some embodiments, multiple security levels correspond to multiple transactions or multiple operations respectively.

According to the method for registering fingerprint feature points based on the security level, the authentication method and the terminal device of the present disclosure, flexible security management can be realized.

Description of drawings

The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

Fig. 1 schematically shows various types of fingerprint feature points;

FIG. 2 shows a method of registering fingerprint feature points based on a security level according to an example embodiment of the present disclosure;

FIG. 3 shows an authentication method according to an example embodiment of the present disclosure; and

FIG. 4 illustrates functional modules of a terminal device according to an example embodiment of the present disclosure.

detailed description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their detailed descriptions will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, one skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or that other methods, components, materials, etc. may be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the present disclosure.

The block diagrams shown in the drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more integrated circuits, or in different network and/or processor means and/or microcontroller means.

The present disclosure provides a method for registering fingerprint feature points according to a security level, an authentication method and a terminal device, which can realize flexible security management.

Commonly used methods for fingerprint identification are pattern recognition, pattern number recognition and feature point recognition. Feature points are fingerprint nodes with certain characteristics. The feature values of feature points include but are not limited to feature point examples, feature point position coordinates (x, y), feature point shape, and feature point distance. The position coordinates of feature points can be absolute coordinates or relative coordinates. Referring to Figure 1, fingerprint feature points are generally divided into the following types:

A. Ending: a line ends here;

B, bifurcation point (Bifurcation): a line splits into two or more lines here;

C. Ridge Divergence: Two parallel lines are separated here;

D. Isolated point (Dot Island): a very short texture, so that it becomes a point;

E. Enclosure (Enclosure): After a strip road splits into two, it immediately merges into one; a small ring formed in this way is called an enclosure; and

F, Short Ridge (Short Ridge): A shorter but not a grain.

Due to the different sizes of finger surfaces, the number of feature points for each finger will vary. Generally speaking, each finger has about 60-125 feature points, among which the thumbprint feature point lines are the most, and among these feature points, bifurcation points and terminal points are the most common.

At present, countries around the world have different views on how many feature points are completely consistent at least to determine that they belong to the same person's fingerprints, but most countries regard twelve feature points as the minimum number of matching points. There are also countries that use fewer points such as 8 to 11 points, or use more points such as 16 points or more.

Fingerprint identification technology can generally be characterized by the following indicators.

False Rejection Rate (FRR: False Rejection Rate), refers to the error probability that the same fingerprint is mistaken for a different fingerprint and rejected. It is defined as: FRR=number of rejected fingerprints/total number of investigated fingerprints×100%.

False Acceptance Rate (FAR: False Accept Rate), refers to the error probability that different fingerprints are mistaken for the same fingerprint and received. It is defined as: FAR=the number of wrongly judged fingerprints/the total number of investigated fingerprints×100%.

Speed: It is an important parameter of the fingerprint identification system, mainly composed of image acquisition time, image processing time, comparison time, and average recognition speed and other indicators. Acquisition time usually includes the operation time of the acquisition and the transmission time of the image. Image processing time refers to the time spent from computing and processing fingerprint images to extracting all feature points and outputting feature point information or feature templates. The acquired fingerprint image is generally a grayscale image with more noise. Therefore, it is also necessary to preprocess the fingerprint image to improve the quality of the fingerprint image, enhance the contrast between ridge peaks and ridge valleys, and turn it into a clear point-line map for feature extraction. Preprocessing of fingerprint images includes normalization, image segmentation, enhancement, binarization and thinning. Corresponding preprocessing steps can be selected according to different application scenarios, which will not be described in detail here. The comparison time refers to the time it takes to calculate two sets of fingerprint feature point information or feature templates, compare them, and give the results. The average recognition speed refers to the speed of searching for a specific fingerprint from the fingerprint feature point information database or feature template database. It is usually a statistical average, and its speed has a lot to do with the fingerprint feature point information library or feature template library.

Since only some limited information of the fingerprint is involved when processing the fingerprint, and the comparison algorithm does not necessarily achieve an exact match, the result cannot be guaranteed to be 100% accurate. In the specific application of the fingerprint recognition system, the important measure is the recognition rate, that is, the false rejection rate (FRR) and the false recognition rate (FAR) mentioned above, and FRR and FAR are inversely proportional.

The selection of conventional feature points does not take into account the security level of the application. That is, the selection of feature points is only related to feature point selection and comparison itself, without considering the factor of security level.

For different types of fingerprint feature points, due to their different numbers and distributions, the difficulty of identification is different. Therefore, this disclosure considers selecting different feature points for security authentication according to different security levels. For example, for common applications, common feature points can be selected first, and feature templates can be output; for applications with higher security levels, less common feature points can be selected first, and feature templates can be output. In this way, for common applications, a quicker response can be performed; for applications with a higher security level, security can be guaranteed more.

FIG. 2 is a flowchart according to an embodiment of the present disclosure, illustrating a method for registering fingerprint feature points based on security levels according to the present disclosure.

Referring to FIG. 2 , a method of selecting fingerprint feature points based on a security level according to an example embodiment is described as follows.

Step S10, dividing multiple security levels. The multiple security levels include a basic security level and at least one security level with a higher security level, and each security level corresponds to one or more fingerprint feature points. For example, the fingerprint feature points corresponding to the basic security level may include bifurcation points and/or end points, since these are the most common feature points. The fingerprint feature points corresponding to higher security levels may sequentially include one or more of branch points, isolated points, loop points and short lines, which are less common feature points. For example, the second security level, which is one level higher than the basic security level, can correspond to divergence points, the third security level, which is two levels higher than the basic security level, can correspond to isolated points, and the fourth security level, which is three levels higher than the basic security level It can correspond to ring dots and short lines, but the disclosure is not limited thereto. Multiple security levels may correspond to multiple transaction processing or multiple operations respectively. For example, the basic security level corresponds to an application with low security requirements, the second security level corresponds to the login of a certain account, the third security level corresponds to small-amount payments, and the fourth security level corresponds to large-amount payments. Publicity is not limited to this.

Step S12, collecting the fingerprint of the user, and extracting a plurality of fingerprint feature points. The method of collecting the user's fingerprint and extracting the fingerprint feature points may be any suitable method of collecting and extracting the fingerprint feature points in the prior art, and for the sake of brevity of description, details are not repeated here.

Step S14, selecting a predetermined number of fingerprint feature points of corresponding security levels and corresponding types. Based on the security level, a predetermined number and corresponding types of feature points are selected from the plurality of fingerprint feature points, and registered as fingerprint feature points of the corresponding security level. For example, if the basic security level corresponds to a fork point, a predetermined number, for example, 8 fork points, are selected from multiple fingerprint feature points and registered as fingerprint feature points of the basic security level.

In step S16, after traversing the feature points, it is judged whether the predetermined number is satisfied. If so, the registration of a predetermined number of feature points is completed. If not, execute step S161.

Step S161, judging whether to select feature points for the basic security level. If yes, execute step S163; if no, execute step S165.

In step S163, additionally select fingerprint feature points corresponding to a security level one higher in order. For example, when a sufficient number of bifurcation points for the basic security level cannot be selected from multiple fingerprint feature points, the bifurcation points corresponding to the second security level of a higher security level are selected and registered as feature points of the basic security level . When still unable to select a sufficient number of feature points for the basic security level, then select isolated points corresponding to the third security level which is one higher security level. This is repeated until a predetermined number of feature points are registered for the basic security level.

Step S165, supplementary selection of fingerprint feature points corresponding to a security level lower than one security level in sequence. For example, when a sufficient number of isolated points for the third security level two levels higher than the basic security level cannot be selected from multiple fingerprint feature points, the divergence corresponding to the second security level one security level lower is selected The points are registered as feature points of the third security level. This is repeated until a predetermined number of feature points are registered for the third security level.

Referring to FIG. 3 , a security level-based authentication method according to an exemplary embodiment of the present disclosure is described as follows.

Step S20, identifying the user's operation and determining the security level of the operation. For example, when the user clicks a small-amount payment confirmation button, the system recognizes the operation as a small-amount payment, and determines that the corresponding security level is, for example, the third security level corresponding to the small-amount payment.

Step S22, collecting the user's fingerprint. Collecting the user's fingerprint may be any suitable method for collecting fingerprint feature points in the prior art, and for the sake of brevity, details are not repeated here.

Step S24, extracting multiple fingerprint feature points based on the security level. As mentioned above, the security level is one of multiple security levels, and each security level corresponds to a predetermined number of one or more fingerprint feature points. The plurality of security levels may include a basic security level and at least one higher security level. If the security level is, for example, the basic security level and the fingerprint feature point corresponding to the basic security level is a fork point, then the fork point is extracted. The method for extracting fingerprint feature points may be any suitable method for extracting fingerprint feature points in the prior art, and for the sake of concise description, details are not repeated here.

Step S28, based on the security level, compare the extracted fingerprint feature points with the pre-stored fingerprint feature points of the corresponding security level, and if they match, confirm that the user has passed the authentication for performing the operation. Any suitable method for comparing fingerprint feature points in the prior art can be used for comparison, and for the sake of brevity, details are not repeated here.

According to an exemplary embodiment, as shown in FIG. 3 , in step S26 , after extracting all the feature points of the corresponding security level, it is judged whether the total number of feature points reaches or exceeds a predetermined number. If so, the extraction of a predetermined number of feature points is completed. If not, execute step S261.

Step 261, judging whether to extract feature points for the basic security level. If yes, execute step S263; if no, execute step S265.

Step S263, supplementary extraction of all fingerprint feature points corresponding to a security level one higher security level in sequence. When a sufficient number of fingerprint feature points for the basic security level cannot be extracted, all fingerprint feature points corresponding to a higher security level are sequentially extracted until the predetermined number is reached or exceeded. For example, when a sufficient number of branching points for the basic security level cannot be extracted, all branching points corresponding to the second security level higher by one security level are extracted. When still unable to extract a sufficient number of feature points for the basic security level, then extract all the isolated points corresponding to the third security level which is one higher security level. This is repeated until the total number of feature points extracted for the basic security level reaches or exceeds a predetermined number.

In step S265, all fingerprint feature points corresponding to a security level lower than one security level are sequentially supplemented and extracted. When a sufficient number of fingerprint feature points for one of the higher security levels of the at least one security level cannot be extracted, all fingerprint feature points corresponding to the security level of a lower security level are sequentially supplemented until reaching or exceeding said predetermined quantity. For example, when a sufficient number of isolated points for the third security level that is two levels higher than the basic security level cannot be extracted, all branch points corresponding to the second security level that is one security level lower are selected. This is repeated until a predetermined number or more feature points are extracted for the third security level.

According to the disclosed method, different feature points are selected for security authentication according to different security levels. For example, for common applications, common feature points can be selected first, and feature templates can be output; for applications with higher security levels, less common feature points can be selected first, and feature templates can be output. In this way, since the number and distribution of different types of fingerprint feature points are different, the difficulty of identification is different, so for common applications, it can respond more quickly; and for applications with higher security levels, security can be more guaranteed.

Referring to FIG. 4 , functional modules of a terminal device according to an exemplary embodiment of the present disclosure are now described.

As shown in FIG. 4 , the terminal device 300 may be a mobile phone, a PDA, a tablet computer, an e-book, and the like. The terminal device 300 may include various functional modules, such as a security class division module 310 , a fingerprint collection module 320 , a feature point extraction module 330 , a registration module 340 , an authentication module 350 and a storage module 360 .

The security level dividing module 310 is configured to divide multiple security levels. As mentioned above, the multiple security levels include a basic security level and at least one security level with a higher security level, and each security level corresponds to a predetermined number of one or more fingerprint feature points. For example, as mentioned above, the fingerprint feature points corresponding to the basic security level may include bifurcation points and/or termination points, and the fingerprint feature points corresponding to at least one security level with a higher security level may include bifurcation points, isolated points, One or more of ring point and short grain. Multiple security levels may correspond to multiple transaction processing or multiple operations respectively.

The fingerprint collecting module 320 is used for collecting the user's fingerprint. As mentioned above, collecting the user's fingerprint may be any suitable method for collecting fingerprint feature points in the prior art, and for the sake of concise description, details are not repeated here.

The feature point extraction module 330 is configured to extract a plurality of fingerprint feature points from the collected fingerprints for registration or authentication. For registration operation or authentication operation, the feature point extraction module 330 is configured in different operation modes.

For example, as mentioned above, if it is used for the registration operation, the feature point extraction module 330 is configured to: when a sufficient number of fingerprint feature points for the basic security level cannot be selected from the plurality of fingerprint feature points, according to Supplementary selection of fingerprint feature points corresponding to a security level with a higher security level until the predetermined number is reached; when a sufficient number of fingerprint feature points cannot be selected for the at least one security level with a higher security level When the fingerprint feature points of one of the security levels are selected, the fingerprint feature points corresponding to the security level of a lower security level are selected sequentially until the predetermined number is reached.

For another example, as mentioned above, if it is used for authentication operations, the feature point extraction module 330 is configured to: when unable to extract a sufficient number of fingerprint feature points for the basic security level, supplementary extraction and a higher security level in sequence All the fingerprint feature points corresponding to the security level until reaching or exceeding the predetermined number; when a sufficient number of fingerprint feature points for one of the at least one security level with a higher security level cannot be extracted, supplementary extraction in sequence All fingerprint feature points corresponding to a security level one lower than the security level until reaching or exceeding the predetermined number.

The registration module 340 is used for performing a registration operation. As mentioned above, the registration module 340 may be configured to select a predetermined number and corresponding types of feature points from the plurality of fingerprint feature points based on the security level, and register as fingerprint feature points of the corresponding security level.

The authentication module 350 is used to perform authentication operations. As mentioned above, the authentication module 350 can be configured to compare the extracted fingerprint feature points with the pre-stored fingerprint feature points of corresponding security level based on the security level, and if they match, confirm that the user is authenticated.

The storage module 360 is used to provide a storage function for at least one of the security class division module, fingerprint collection module, feature point extraction module, registration module and authentication module.

Through the above description of the implementation manners, those skilled in the art can easily understand that the embodiments of the present disclosure can be implemented by hardware, or can be implemented by combining software with necessary hardware. Therefore, the technical solutions of the embodiments of the present disclosure can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), including several instruction It is used to make a computing device (which may be a personal computer, a server, a mobile terminal, or a network device, etc.) execute the method according to the embodiments of the present disclosure.

Those skilled in the art can understand that the drawings are only schematic diagrams of exemplary implementations, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.

Those skilled in the art can understand that the above modules can be distributed in the device according to the description of the embodiment, or can be located in one or more devices different from the embodiment according to the corresponding changes. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

Exemplary embodiments of the present disclosure have been specifically shown and described above. It should be understood that the present disclosure is not limited to the disclosed embodiments, but on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (9)

1. A method for registering fingerprint feature points based on a security level, comprising: Divide multiple security levels, the multiple security levels include a basic security level and at least one security level with a higher security level, each security level corresponds to one or more types of fingerprint feature points; Collect the user's fingerprint and extract multiple fingerprint feature points; selecting a predetermined number and corresponding types of feature points from the plurality of fingerprint feature points based on the security level, and registering them as fingerprint feature points of the corresponding security level; Wherein when a sufficient number of fingerprint feature points for the basic security level cannot be selected from the plurality of fingerprint feature points, the fingerprint feature points corresponding to the security level of a higher security level are selected sequentially until the predetermined quantity; When a sufficient number of fingerprint feature points for one of the at least one security level with a higher security level cannot be selected from the plurality of fingerprint feature points, sequentially supplementary selection of the fingerprint feature points corresponding to the security level with a lower security level Fingerprint feature points until the predetermined number is reached. 2. The method according to claim 1, wherein the fingerprint feature points corresponding to the basic security level include bifurcation points and/or termination points; The fingerprint feature points corresponding to at least one security level with a higher security level sequentially include one or more of branch points, isolated points, loop points and short lines. 3. An authentication method based on security level, comprising: Identify user actions and determine the security level of said actions; Collect user's fingerprints; Based on the security level, extract a plurality of fingerprint feature points, the security level is one of a plurality of security levels, the plurality of security levels include a basic security level and at least one security level with a higher security level, each security level Corresponding to a predetermined number of one or more types of fingerprint feature points; Based on the security level, comparing the extracted fingerprint feature points with the pre-stored fingerprint feature points of the corresponding security level, if they match, confirming that the user has passed the authentication for performing the operation; Wherein when it is impossible to extract a sufficient number of fingerprint feature points for the basic security level, all the fingerprint feature points corresponding to the security level of a higher security level are sequentially supplemented until reaching or exceeding the predetermined number; When a sufficient number of fingerprint feature points for one of the higher security levels of the at least one security level cannot be extracted, all fingerprint feature points corresponding to the security level of a lower security level are sequentially supplemented until reaching or exceeding said predetermined quantity. 4. The authentication method according to claim 3, wherein the plurality of security levels include a basic security level and at least one security level with a higher security level. 5. The authentication method according to claim 4, wherein the fingerprint feature points corresponding to the basic security level include bifurcation points and/or termination points; The at least one fingerprint feature point of a higher security level sequentially includes one or more of branch points, isolated points, loop points and short lines. 6. A terminal device, comprising: A security level division module configured to divide multiple security levels, the multiple security levels include a basic security level and at least one security level with a higher security level, and each security level corresponds to a predetermined number of one or more types of fingerprints Feature points; A fingerprint collection module, used to collect the user's fingerprint; A feature point extraction module is used to extract a plurality of fingerprint feature points from the collected fingerprints for registration or authentication operations; A registration module, configured to perform a registration operation, configured to select a predetermined number and corresponding types of feature points from the plurality of fingerprint feature points based on the security level, and register as fingerprint feature points of the corresponding security level; An authentication module, configured to perform an authentication operation, configured to compare the extracted fingerprint feature points with the pre-stored fingerprint feature points of the corresponding security level based on the security level, and if they match, confirm that the user has passed the authentication; and A storage module, configured to provide a storage function for at least one of the security level division module, fingerprint collection module, feature point extraction module, registration module and authentication module; Wherein when used for registration operation, the feature point extraction module is configured as: When a sufficient number of fingerprint feature points for the basic security level cannot be selected from the plurality of fingerprint feature points, supplementary selection of fingerprint feature points corresponding to a security level with a higher security level in order until the predetermined number is reached ; When a sufficient number of fingerprint feature points for one of the at least one security level with a higher security level cannot be selected from the plurality of fingerprint feature points, sequentially supplementary selection of the fingerprint feature points corresponding to the security level with a lower security level Fingerprint feature points until the predetermined number is reached. 7. The terminal device according to claim 6, wherein the fingerprint feature points corresponding to the basic security level include bifurcation points and/or termination points; The fingerprint feature points corresponding to at least one security level with a higher security level sequentially include one or more of branch points, isolated points, loop points and short lines. 8. The terminal device according to claim 6, wherein when being used for authentication operation, the feature point extraction module is configured as: When a sufficient number of fingerprint feature points for the basic security level cannot be extracted, all fingerprint feature points corresponding to a higher security level are sequentially supplemented until reaching or exceeding the predetermined number; When a sufficient number of fingerprint feature points for one of the higher security levels of the at least one security level cannot be extracted, all fingerprint feature points corresponding to the security level of a lower security level are sequentially supplemented until reaching or exceeding said predetermined quantity. 9. The terminal device according to claim 6, wherein the multiple security levels correspond to multiple transactions or multiple operations respectively.