A biometric authentication system equipped with a contactless smart card and a registration support device, and a method for registering a user who has the system.

Abstract

A registration assistance device (11) comprising: a carrier (13) having a first surface portion (15) for a user device (12) and a second surface portion (17) for a contactless smart card (1), a first wireless power transfer device (19) supported by the carrier and arranged on the first surface portion (15) of the carrier, a second wireless power transfer device (21) supported by the carrier and arranged on the second surface portion (17) of the carrier, and a conductor device (23) supported by the carrier and conductively connecting the first wireless power transfer device (19) and the second wireless power transfer device (21).

Description

Technical Field

[0001] The present invention relates to a registration support device for promoting biometric authentication registration of a user of a non-contact smart card including a biometric authentication device, and a method for registering the user.

Background Art

[0002] Biometric authentication devices are widely used as a means for increasing the convenience and security of personal electronic devices such as mobile phones. In particular, fingerprint sensing devices are currently included in a large proportion of all newly released personal communication devices such as mobile phones.

[0003] Recently, efforts have also been made to introduce biometric authentication devices such as fingerprint sensing devices in other devices that can only have lower computing power and / or less available energy. Examples of such other devices are so-called smart cards, door locks, and devices in so-called Internet of Things (IoT) categories.

[0004] However, providing a safe, reliable, and convenient biometric authentication registration for users of such biometric authentication devices requires a lot of effort. For example, some devices having a biometric authentication device may not have a user interface, or may be complicated due to the fact that they may only have very basic means for interacting with the user, making it desirable to guide the user during registration. For example, a smart card capable of biometric authentication may typically not have a user interface integrated into the smart card.

[0005] Regarding contactless smart cards, U.S. Public Postscript 2020 / 0327533 proposes powering and communicating with the smart card during registration using the user's mobile device. To assist users in correctly positioning the smart card with respect to the mobile device, U.S. Public Postscript 2020 / 0327533 discloses displaying a visual marker on the mobile device's screen to guide the user in correctly positioning the smart card on the back of the mobile device during the registration procedure.

[0006] While attempting to register one or more fingers following the instructions and guidance provided on the mobile device's front display, the user having to press the smart card against the back of the mobile device seems potentially cumbersome.

[0007] Therefore, it would be desirable to provide a more user-friendly registration process for contactless smart cards that enable biometric authentication. [Overview of the Initiative]

[0008] In consideration of the above and other drawbacks of the prior art, the object of the present invention is to provide an improved, and in particular, more user-friendly, registration in a biometrically capable contactless smart card.

[0009] Accordingly, according to a first aspect of the present invention, a registration support device is provided for facilitating biometric registration of a user of a contactless smart card, which includes a biometric authentication device and a wireless power transfer device. The registration support device comprises a carrier having a first surface portion for arranging a user device including a wireless power transfer device and a second surface portion spaced apart from the first surface portion for arranging a contactless smart card; a first wireless power transfer device supported by the carrier and arranged to form a first wireless power transfer link with the wireless power transfer device of the user device when the user device is placed on the first surface portion of the carrier; a second wireless power transfer device supported by the carrier and arranged to form a second wireless power transfer link with the wireless power transfer device of the contactless smart card when the contactless smart card is placed on the second surface portion of the carrier; and a conductor device supported by the carrier that conductively connects the first wireless power transfer device and the second wireless power transfer device so that power transfer from the user device to the contactless smart card is possible via the first wireless power transfer link, the conductor device, and the second wireless power transfer link.

[0010] The present invention is based on the recognition that registration in a biometrically capable contactless smart card can be improved by utilizing wireless power transfer from the user device and facilitating the placement of the contactless smart card relative to the user device, so that the user is not required to actively hold the smart card relative to the user device during the registration procedure. The inventors of the present invention further recognize that this can be achieved by providing a registration assistance device having a carrier having a first wireless power transfer device in a predetermined first part, a second wireless power transfer device in a predetermined second part spaced apart from the first part, and a conductor device connecting the first and second wireless power transfer devices so that power can be transferred from the user device to the contactless smart card via the first and second wireless power transfer devices and the conductor device.

[0011] This allows the contactless smart card and user device to be positioned so that the user has easy access to a biometric sensor, such as a fingerprint sensor, on the smart card, throughout the registration process. If the user device has a GUI (Graphical User Interface), the user can also be guided through the registration process using the GUI of the user device. This can result in a shorter registration process and potentially higher quality registered biometric templates.

[0012] Furthermore, a configuration comprising a carrier, first and second wireless power transfer devices, and interconnecting conductor devices supported by the carrier does not require batteries or conventional cable installation, thus providing a relatively low-cost and environmentally friendly manufacturing method for registration support devices.

[0013] Accordingly, the registration support device according to the embodiment of the present invention can be distributed to users together with or separately from a contactless smart card having a biometric authentication device, while reducing costs and environmental impact.

[0014] In embodiments, the registration support device may be provided in the form of a sheet having first and second wireless power transfer devices and interconnecting conductor devices provided on or embedded in the sheet. The sheet may be manufactured at least partially from paper.

[0015] The registration support device may further include a biometric authentication system, comprising a contactless smart card containing a biometric authentication device and a wireless power transfer device, the contactless smart card being positioned on a second surface portion of the carrier of the registration support device.

[0016] A second aspect of the present invention provides a method for registering a user having a mobile user device which includes the above-described biometric authentication system and a wireless power transfer device positioned adjacent to the back of the mobile user device to provide an electric field for power transfer, and a display positioned on the front of the mobile user device, the method comprising the steps of: guiding the user to position the mobile user device on a first surface portion of a carrier provided in the biometric authentication system, with the back of the mobile user device facing the first surface portion; transmitting a signal encoding an instruction to a contactless smart card positioned on a second surface portion of the carrier via the mobile user device to initiate biometric registration; and receiving a signal from the contactless smart card positioned on the second surface portion of the carrier after biometric registration has been completed via the mobile user device.

[0017] In various embodiments of the method according to the present invention, the carrier of a registration support device provided in a biometric authentication system may have at least one mark for guiding a user to correctly position a mobile user device on a first portion of the carrier with respect to a first wireless power transfer device, and the steps of guiding the user may include providing on the display of the mobile user device an alignment pattern positioned on the display with respect to the wireless power transfer device of the mobile user device, and at least one mark on the carrier, thereby controlling the mobile user device to align the wireless power transfer device of the mobile user device with the first wireless power transfer device of the registration support device provided in the biometric authentication system by aligning the alignment pattern on the display with at least one mark on the carrier.

[0018] In the embodiment, the method may further include the steps of performing user authentication using a mobile user device and enabling the completion of biometric registration only if user authentication is successful.

[0019] User authentication using a mobile user device may include, for example, entering a password, PIN, or OTP into the mobile user device, or performing biometric authentication using the mobile user device. Following successful authentication, a signal provided by the mobile user device to the contactless smart card can unlock the biometric registration function of the contactless smart card. Such a procedure itself is well known to those with skill in the relevant technology.

[0020] Alternatively, registration with a contactless smart card can be performed before the user authentication described above, and if subsequent user authentication fails or is not performed, the contactless smart card can be locked or the registered biometric information can be deleted.

[0021] The methods according to embodiments of the present invention can be advantageously executed, at least in part, by a computer program (such as an application) running on a mobile user device. Such a computer program can be provided to the user, for example, by the issuer of a contactless smart card. The contactless smart card may be, for example, a dual-interface smart card.

[0022] In summary, the present invention relates to a registration support device comprising a carrier having a first surface portion for a user device and a second surface portion for a contactless smart card; a first wireless power transfer device supported by the carrier and located on the first surface portion of the carrier; a second wireless power transfer device supported by the carrier and located on the second surface portion of the carrier; and a conductor device supported by the carrier that conductively connects the first wireless power transfer device and the second wireless power transfer device. [Brief explanation of the drawing]

[0023] These and other aspects of the present invention are described herein in more detail with reference to the accompanying drawings illustrating embodiments as examples of the invention.

[0024] [Figure 1A] Figure 1A shows a contactless smart card capable of biometric authentication as an example.

[0025] [Figure 1B] Figure 1B is a schematic diagram of the smart card in Figure 1A when the cover is removed to show the functional part of the smart card.

[0026] [Figure 2] Figure 2 is a schematic diagram of a biometric authentication system including a registration support device according to an embodiment as an example of the present invention and the contactless smart card in Figure 1A disposed on a predetermined second surface portion of the registration support device.

[0027] [Figure 3A] Figure 3A is a front view of the registration support device in Figure 2 in a state without a contactless smart card.

[0028] [Figure 3B] Figure 3B is a back view of the registration support device in Figure 3A. [[ID=二十九]]

[0029] [Figure 4A] Figure 4A is a schematic cross-sectional view of a different example of the configuration of the registration support device 11 in Figures 3A - B. [Figure 4B] Figure 4B is a schematic cross-sectional view of a different example of the configuration of the registration support device 11 in Figures 3A - B.

[0030] [Figure 5] Figure 5 is a flowchart showing a method according to an embodiment as an example of the present invention.

[0031] [Figure 6] Figure 6 is a schematic diagram showing how to guide a user to correctly position a user device with respect to a registration support device. [Modes for carrying out the invention]

[0032] Figure 1A schematically shows an example contactless smart card 1, which here includes a biometric device 3 in the form of a fingerprint sensor module. The contactless smart card 1 may be, for example, a biometric payment card, and payment can be authorized by biometric authentication of the user, as schematically shown in Figure 1A. Of course, the payment card shown in Figure 1A is not the only type of biometric contactless smart card for which embodiments of the present invention may be useful. Other examples of biometric contactless smart cards may include access cards, memory cards, ID cards, and the like.

[0033] As schematically shown in Figure 1B, the smart card 1 further comprises a wireless power transfer device 5 and, in this particular embodiment, a secure element 7. The wireless power transfer device 5 can be used to draw power from a time-varying electric field and to wirelessly transmit it, typically via load modulation, to a remote device such as a card reader (not shown). The secure element 7 may contain, for example, information for authorizing a transaction and is connected to a biometric device 3. Once the user is authenticated by the biometric device 3 (or by the biometric device 3 in cooperation with the secure element 7), the information contained in the secure element 7 can be unlocked and transmitted wirelessly to the remote device via the wireless power transfer device 5.

[0034] Figure 2 is a schematic diagram of a biometric authentication system 9, which includes a registration support device 11 according to an embodiment of the present invention, and a contactless smart card 1 as shown in Figure 1A, which is fixed or otherwise positioned on a predetermined second surface portion of the registration support device 11. Visually, the biometric authentication system 9 in Figure 2 may resemble a letter sent to a user by the issuer of a smart card, but the registration support device 11, which replaces the usual sheet of paper in such a letter, can help the user easily perform biometric registration using the biometric device 3 of the contactless smart card 1. The contactless smart card 1 can be fixed, for example, with a suitable adhesive, inserted into a sleeve provided in the registration support device 11, or loosely positioned on a predetermined second surface portion.

[0035] In Figure 2, the user device 12 is shown to be placed in a predetermined position on the registration support device 11 in order to wirelessly supply power to the contactless smart card 1 during the biometric authentication registration process described above.

[0036] Figure 3A is a front view of the registration support device 11 in Figure 2, and Figure 3B is a back view. Referring first to Figure 3A, the registration support device 11 comprises a carrier 13 having a first surface portion 15 and a second surface portion 17 spaced apart from the first surface portion 15. The first surface portion 15 is for arranging the user device, and the second surface portion 17 is for arranging the contactless smart card.

[0037] Referring to Figure 3B, the registration support device 11 further comprises a first wireless power transfer device 19, a second wireless power transfer device 21, and a conductor device 23 supported by the carrier 13, which conductively connects the first wireless power transfer device 19 and the second wireless power transfer device 21.

[0038] The first wireless power transfer device 19 is supported by the carrier 13 below the first surface portion 15 when viewed from the front side of the registration support device 11 (Figure 3A), thereby enabling the formation of a first wireless power transfer link between the user device (such as the mobile user device 12 in Figure 2) and the wireless power transfer device of the user device when the user device is correctly positioned on the first surface portion 15 of the carrier 13. The second wireless power transfer device 21 is supported by the carrier 13 below the second surface portion 17 when viewed from the front side of the registration support device 11 (Figure 3A), thereby enabling the formation of a second wireless power transfer link between the contactless smart card (such as the contactless smart card 1 in Figure 2) and the wireless power transfer device of the contactless smart card 1 when the contactless smart card 1 is correctly positioned on the second surface portion 17 of the carrier 13.

[0039] Conductor device 23 conductively connects the first wireless power transfer device 19 and the second wireless power transfer device 21 via the first wireless power transfer link, conductor device 23, and the second wireless power transfer link described above, enabling power transfer from the user device 12 to the contactless smart card 1.

[0040] Carrier 13 may be cellulosic to minimize environmental impact, which is advantageous, but alternatively, it can be made from plastic materials that can be recycled and / or manufactured without using fossil materials (materials obtained using fossil fuels (petroleum, coal, natural gas, etc.)). The conductor patterns forming the first wireless power transfer device 19, the second wireless power transfer device 21, and the conductor device 23 can be supported on the surface of carrier 13, either on the front or back side of carrier 13. Alternatively, the conductor patterns can be embedded in carrier 13. For example, carrier 13 may have a multilayer structure.

[0041] Figure 4A is a partially schematic cross-sectional view of the registration support device 11 in the cross-section indicated by A-A' in Figure 3B, showing a configuration as a first example in which the conductor 25 forming the above-mentioned conductor pattern is provided on the surface of the carrier 13. The conductor 25 can be printed using conductive ink using techniques known in itself. Alternatively, the conductor 25 can be pre-formed on a sticker that can be attached to the carrier 13.

[0042] Figure 4B shows a configuration as a second example in which the conductor 25 is embedded inside the carrier 13 through a lamination between the first sheet 27 and the second sheet 29.

[0043] Due to the standardized form factor of the contactless smart card, achieving the correct placement of the contactless smart card 1 with respect to the second wireless power transfer device 21 is relatively straightforward. As further described above, the contactless smart card 1 can be pre-attached to the correct location on the second surface portion 17. Achieving the correct placement of the user device 12 may require more effort, as the configuration and placement of the wireless power transfer device of the user device 12 may vary depending on the model. For example, referring again to Figure 3A, one model of the user device can form a reliable wireless power transfer link with the first wireless power transfer device 19 of the registration support device 11 when placed as shown by the first outline 31 in Figure 3A, while other models of the user device may need to be placed as shown by the second outline 33 in Figure 3A.

[0044] To facilitate the correct placement of the user device 12, with respect to the first wireless power transfer device 19, at least one mark can be provided on the carrier 13 to guide the user to correctly position the user device 12 on the first portion of the carrier 13. The at least one mark may comprise, for example, a number of outlines 31, 33 as described above, corresponding to the physical outline of most typical user devices 12. Alternatively, or in combination, the at least one mark may comprise a guide pattern, such as a grid pattern 35 as an example shown in Figures 2 and 3A.

[0045] In the above embodiment of the registration support device 11, the wireless power transfer devices 19 and 21 are exemplified as being configured for inductive power transfer. It should be noted that other forms of wireless power transfer, such as capacitive power transfer, may also be used as alternatives. Furthermore, the user device 12 does not necessarily have to be a mobile phone or similar personal communication device. In the embodiment, the registration support device 11 may be configured for use with, for example, a wireless charger or similar device.

[0046] A method relating to an embodiment of the present invention is described herein with reference to the flowchart in Figure 5 and, additionally, to other figures as shown. When the method is performed, the user has a biometric authentication system 9 as described above with reference to Figure 2. The biometric authentication system 9, which includes a registration support device 11 and a contactless smart card 1 placed on the second surface portion 17 of the carrier 13, can be pre-sent to the user by email by a card issuer, such as a financial institution. The user also has a mobile user device 12, such as a mobile phone or tablet, which includes a wireless power transfer device positioned adjacent to the back of the mobile user device to provide an electric field for power transfer, and a display positioned on the front of the mobile user device 12.

[0047] In the first step, the user is guided to position the mobile user device 12 on the first surface portion 15 of the carrier 13 of the registration support device 11 provided in the biometric authentication system 9, with the back side of the mobile user device 12 facing the first surface portion 15. This guidance is achieved by providing the user with instructions. Such instructions can be included, for example, in the biometric authentication system 9 provided to the user. For example, textual and / or graphical instructions can be printed on the carrier. As described above, such graphical instructions can include outlines 31, 33 of a general-purpose mobile phone.

[0048] Alternatively, the user can be guided by controlling the mobile user device 12 to provide an alignment pattern 37 on the display 39 of the mobile user device 12 (see the diagram of the mobile user device 12 as an example in Figures 2 and 6). The mobile user device 12 is controlled by software, for example by an application that may be provided by the card issuer, and is controlled with respect to the wireless power transfer device of the mobile user device 12 to position the alignment pattern 37 on the display 39 and position at least one mark (such as a grid pattern 35) on the carrier 13, so that the user can align the alignment pattern 37 on the display with at least one mark 35 on the carrier 13, thereby aligning the wireless power transfer device of the mobile user device 12 with the first wireless power transfer device 19 of the registration support device 11 provided in the biometric authentication system 9.

[0049] In this example, the software running on the mobile user device 12 provides the relevant positional relationships between the configuration of at least one mark 35 on the carrier 13, the wireless power transfer equipment provided in the mobile user device 12, and the display 39 of the mobile user device 12.

[0050] In the subsequent step 101, the mobile user device 12 transmits a signal to the contactless smart card 1 that encodes an instruction to initiate biometric registration on the contactless smart card 1. This signal is transmitted wirelessly to the contactless smart card 1 and can be transmitted via the registration support device 11 using techniques known for short-range communication. Alternatively, this signal can be transmitted wirelessly using other wireless communication links, such as using low-power wireless transmission.

[0051] During the registration procedure, the user can be guided by instructions and / or diagrams provided on the display 39 of the mobile user device 12. Such instructions and / or diagrams may be based on information provided wirelessly to the mobile user device 12 from the contactless smart card 1. For example, the user may be instructed on where to place their finger, and / or the user may receive information about the status of the registration procedure.

[0052] Once the registration procedure is complete, as determined by the biometric authentication device 3 of the contactless smart card 1, the mobile user device receives a signal in step 102 indicating that registration is complete.

[0053] In some embodiments, the ability to successfully complete registration and enable the use of the biometric recognition function of the contactless smart card 1 may be conditional on user authentication performed using the mobile user device 12. This may be particularly the case of so-called initial registration, where no biometric authentication template is stored on the smart card. In such embodiments, the mobile user device 12 can perform user authentication locally using, for example, a fingerprint sensor 41 or other biometric device provided in the mobile user device 12. Alternatively, the mobile user device 12 can be used as an input device for entering a code such as a password, PIN, or OTP for transmission to a remote server for authentication at the remote server.

[0054] In one embodiment, the signal encoding the (correct) instruction to initiate registration on the contactless smart card 1 can only be sent when user authentication is successful. In another embodiment, registration can be performed, but the generated biometric template can be discarded or the biometric authentication function of the smart card 1 can be locked unless user authentication is successful.

[0055] In the claims, the term “equipped with” does not exclude other elements or steps, and the term “one” does not exclude multiple. The mere fact that certain means are enumerated in different dependent claims does not imply that a combination of these means cannot be used advantageously. The inventions disclosed herein include the following: [Item 1] A biometric authentication system (9), A contactless smart card (1) includes a biometric authentication device (3) and a wireless power transfer device (5), The system is equipped with a registration support device (11), and the registration support device (11) is: A carrier (13) having a first surface portion (15) for arranging a user device (12) including a wireless power transfer device, and a second surface portion (17) spaced apart from the first surface portion (15) for arranging the contactless smart card (1), Supported by the carrier, and positioned to form a first wireless power transfer link between the user device (12) and the wireless power transfer device (19) when the user device is placed on the first surface portion (15) of the carrier (13), Supported by the carrier, and positioned to form a second wireless power transfer link between the contactless smart card (1) and the wireless power transfer device (5) when the contactless smart card is placed on the second surface portion (17) of the carrier (13), A conductive device (23) supported by the carrier, comprising a conductive device (23) conductively connecting the first wireless power transfer device (19) and the second wireless power transfer device (21) so that power transfer from the user device (12) to the contactless smart card (1) is possible via the first wireless power transfer link, the conductive device (23), and the second wireless power transfer link, The biometric authentication system (9) is characterized in that the contactless smart card (1) is placed on the second surface portion (17) of the carrier (13) of the registration support device (11). [Item 2] The biometric authentication system (9) according to item 1, characterized in that the carrier (13) is provided with at least one mark in the shape of a number of outlines (31, 33) and / or guide patterns (35) of different user devices to guide the user to correctly position the user device (12) on the first surface portion (15) of the carrier (13) with respect to the first wireless power transfer device (19). [Item 3] The biometric authentication system (9) according to item 1 or 2, characterized in that the carrier (13) is provided in the form of a sheet. [Item 4] The biometric authentication system (9) according to any one of items 1 to 3, characterized in that the carrier (13) is cellulose-based. [Item 5] The biometric authentication system (9) according to any one of items 1 to 4, characterized in that the first wireless power transfer device (19), the second wireless power transfer device (21), and the conductor device (23) are printed on a carrier (13). [Item 6] The biometric authentication system (9) according to any one of items 1 to 5, characterized in that the first wireless power transfer device (19) and the second wireless power transfer device (21) are configured for inductive power transfer. [Item 7] A method for registering a user having a mobile user device (12) which includes the biometric authentication system (9) described in any one of items 1 to 6, a wireless power transfer device positioned adjacent to the back of the mobile user device (12) to provide an electric field for power transfer, and a display (39) positioned on the front of the mobile user device (12), The biometric authentication system (9) includes a step (100) of guiding the user to place the mobile user device (12) on the first surface portion (15) of the carrier (13) of the registration support device (11) provided therein, with the back side of the mobile user device (12) facing the first surface portion, The mobile user device (12) transmits a signal (101) that encodes an instruction to the contactless smart card (1) to initiate biometric registration, which is located on the second surface portion (17) of the carrier (13), The method is characterized by comprising the step of receiving a signal (102) from the contactless smart card (1) placed on the second surface portion (17) of the carrier (13) by the mobile user device (12) after the biometric authentication registration has been completed. [Item 8] The signal encoding the instruction to the contactless smart card (1) to perform biometric registration is transmitted via the first wireless power transfer device (19), the conductor device (23), and the second wireless power transfer device (21) provided in the registration support device (11) included in the biometric authentication system (9). The method according to item 7, characterized in that the signal indicating the completion of the registration is received via the first wireless power transfer device (19), the conductor device (23), and the second wireless power transfer device (21) provided in the registration support device (11) included in the biometric authentication system (9). [Item 9] The carrier (13) of the registration support device (11) provided in the biometric authentication system (9) is provided with at least one mark (35) for guiding the user to correctly position the mobile user device (12) on the first surface portion (15) of the carrier (13) with respect to the first wireless power transfer device (19), The method according to item 7 or 8, characterized in that the step of guiding the user (100) comprises providing on the display (39) of the mobile user device (12) an alignment pattern (37) arranged on the display with respect to the wireless power transfer device of the mobile user device, and the at least one mark (35) on the carrier (13), thereby enabling the user to align the wireless power transfer device of the mobile user device (12) with the first wireless power transfer device (19) of the registration support device (11) provided in the biometric authentication system (9). [Item 10] The method further comprises the step of receiving information indicating the model of the mobile user device (12), The method according to item 9, characterized in that the alignment pattern (37) formed on the display (39) depends on the received information. [Item 11] The steps include performing user authentication using the mobile user device (12), The method according to any one of items 7 to 10, further comprising a step that enables the completion of biometric authentication registration only if the user authentication is successful. [Item 12] A computer program characterized in that, when operated on a mobile user device (12) which includes a wireless power transfer device on the back of the mobile user device and a display (39) on the front of the mobile user device, it causes the mobile user device to perform the steps described in any one of items 7 to 11.

Claims

1. A biometric authentication system (9), A contactless smart card (1) includes a biometric authentication device (3) and a wireless power transfer device (5), The system is equipped with a registration support device (11), and the registration support device (11) is A carrier (13) having a first surface portion (15) for arranging a user device (12) including a wireless power transfer device, and a second surface portion (17) spaced apart from the first surface portion (15) for arranging the contactless smart card (1), Supported by the carrier, and positioned to form a first wireless power transfer link with the wireless power transfer device of the user device (12) when the user device is placed on the first surface portion (15) of the carrier (13), Supported by the carrier, and positioned to form a second wireless power transfer link between the contactless smart card (1) and the wireless power transfer device (5) when the contactless smart card is placed on the second surface portion (17) of the carrier (13), A conductor device (23) supported by the carrier, comprising a conductor device (23) conductively connecting the first wireless power transfer device (19) and the second wireless power transfer device (21) so that power transfer from the user device (12) to the contactless smart card (1) is possible via the first wireless power transfer link, the conductor device (23), and the second wireless power transfer link, The biometric authentication system (9) is characterized in that the contactless smart card (1) is placed on the second surface portion (17) of the carrier (13) of the registration support device (11).

2. The biometric authentication system (9) according to claim 1, wherein the carrier (13) is provided with at least one mark in the shape of a number of outlines (31, 33) and / or guide patterns (35) of different user devices to guide the user to correctly position the user device (12) on the first surface portion (15) of the carrier (13) with respect to the first wireless power transfer device (19).

3. The biometric authentication system (9) according to claim 1 or 2, characterized in that the carrier (13) is provided in the form of a sheet.

4. The biometric authentication system (9) according to any one of claims 1 to 3, characterized in that the carrier (13) is made of a cellulose-based material.

5. The biometric authentication system (9) according to any one of claims 1 to 4, characterized in that the first wireless power transfer device (19), the second wireless power transfer device (21), and the conductor device (23) are printed on a carrier (13).

6. The biometric authentication system (9) according to any one of claims 1 to 5, characterized in that the first wireless power transfer device (19) and the second wireless power transfer device (21) are configured for inductive power transfer.

7. A method for registering a user having a mobile user device (12) which includes the biometric authentication system (9) according to any one of claims 1 to 6, a wireless power transfer device arranged adjacent to the back side of the mobile user device (12) to provide an electric field for power transfer, and a display (39) arranged on the front side of the mobile user device (12), The biometric authentication system (9) includes a step (100) of guiding the user to position the mobile user device (12) on the first surface portion (15) of the carrier (13) of the registration support device (11), with the back side of the mobile user device (12) facing the first surface portion, The mobile user device (12) transmits a signal (101) that encodes an instruction to the contactless smart card (1) to initiate biometric registration to the contactless smart card (1) which is placed on the second surface portion (17) of the carrier (13), The method is characterized by comprising the step of receiving a signal (102) from the contactless smart card (1) placed on the second surface portion (17) of the carrier (13) by the mobile user device (12) after the biometric authentication registration has been completed.

8. The signal encoding the instruction to the contactless smart card (1) to perform biometric registration is transmitted via the first wireless power transfer device (19), the conductor device (23), and the second wireless power transfer device (21) provided in the registration support device (11) included in the biometric authentication system (9). The method according to 7, characterized in that the signal indicating that the registration has been completed is received via the first wireless power transfer device (19), the conductor device (23), and the second wireless power transfer device (21) provided in the registration support device (11) included in the biometric authentication system (9).

9. The carrier (13) of the registration support device (11) provided in the biometric authentication system (9) is provided with at least one mark (35) for guiding the user to correctly position the mobile user device (12) on the first surface portion (15) of the carrier (13) with respect to the first wireless power transfer device (19), The method according to 7 or 8, wherein the step of guiding the user (100) comprises providing on the display (39) of the mobile user device (12) an alignment pattern (37) arranged on the display with respect to the wireless power transfer device of the mobile user device, and the at least one mark (35) on the carrier (13), thereby controlling the mobile user device (12) to align the alignment pattern (37) on the display (39) with the at least one mark (35) on the carrier (13), thereby enabling the user to align the wireless power transfer device of the mobile user device (12) with the first wireless power transfer device (19) of the registration support device (11) provided in the biometric authentication system (9).

10. The method further comprises the step of receiving information indicating the model of the mobile user device (12), The method according to 9, characterized in that the alignment pattern (37) formed on the display (39) depends on the received information.

11. The steps include performing user authentication using the mobile user device (12), The method according to any one of claims 7 to 10, further comprising the step of enabling the completion of biometric authentication registration only if the user authentication is successful.

12. A computer program characterized in that, when operated on a mobile user device (12) which includes a wireless power transfer device on the back of the mobile user device and a display (39) on the front of the mobile user device, it is configured to cause the mobile user device to perform the steps described in any one of claims 7 to 11.

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