EP4252125A1

EP4252125A1 - Device and method for authenticating a user of a virtual reality helmet

Info

Publication number: EP4252125A1
Application number: EP21840647.8A
Authority: EP
Inventors: Richard Guignon; Sébastien Poivre; Gildas Belay
Original assignee: Orange SA
Current assignee: Orange SA
Priority date: 2020-11-30
Filing date: 2021-11-29
Publication date: 2023-10-04
Also published as: CN116491106A; FR3116919A1; US20240012898A1; WO2022112727A1

Abstract

The invention relates to authenticating a user of a virtual reality helmet. The invention relates to a device for authenticating a user of a virtual reality helmet, the authentication device comprising an analyser capable of verifying whether an image relating to at least one element of a real environment captured by the virtual reality helmet corresponds to a reference datum stored in association with an identifier of the user of the virtual reality helmet. The use of the virtual reality helmet can thus be linked to the room in which the helmet is located. The authentication is thus carried out by means of the visual "footprint" of the room. Alternatively, the authentication may depend on a password made up of objects as opposed to letters or numbers. The objects correspond to images of said objects captured according to the viewing directions of the user in order to compose the object password.

Description

DESCRIPTION

DEVICE AND METHOD FOR AUTHENTICATING A USER OF A VIRTUAL REALITY HELMET Technical Field

The invention relates to the authentication of a user of a virtual reality headset.

State of the art

Authentication makes it possible to legitimize the request for access to a device (computer, smartphone, connected object, etc.) or to a service (website, application, cloud, video on demand - or VoD for "video on demand" in English, teleconference, collaborative space, etc. by a person in order to authorize access to the resources (system, communication network, applications, content, etc.) of the device or service.

For this, authentication consists of verifying the identity of the person requesting access to the device or service by verifying access data such as a password, data provided by an identification document such as a smart card, an electronic certificate..., biometric data (fingerprints, iris, face), a signature or a gesture.

The type of access data generally depends on the degree of security of the device or service to be accessed and the device used to provide this access data.

In the next few years, virtual reality and virtual reality systems are promised a certain development. However, the use of such virtual and/or augmented reality systems in certain uses, in particular professional ones, sometimes requires authentication of the user of these systems. For example, access to a meeting in virtual reality by a participant requires authentication of this participant before allowing him to access the meeting and, in particular, the documents exchanged during it. In addition, if this participant wishes to share some of his documents, he must be able to access them securely from the virtual meeting without the other participants also having access to them.

However, today, the authentication of users to communication devices and/or services provided via communication networks is still very often based on the use of the keyboard and/or the mouse to enter an identifier of user (also called login in English) and a password or an authentication code.

Indeed, the use of biometric data has long been limited due to sensors not available on the communication devices and high computational costs during the recognition of these biometric data. Today, particularly in the field of mobile telephony, user authentication by fingerprints is developing, and user authentication by face recognition is starting slowly. But the latter is not always reliable showing difficulties in performing authentication other than the classic login/password.

But in the context of virtual reality, it is still the use of the login/password that prevails regardless of the type of headset: headset connected to a computer (such as the Oculus Rift™ and the HTC Vive™ ) or stand-alone headset (such as the Oculus Quest™...).

In the case of headphones connected to a computer, a keyboard and/or a mouse are often available to allow the user to enter their login/password. However, the user experience is degraded because the user must switch from the computer to the headset at the time of authentication. Let's go back to our example of a virtual meeting, the user must, to enter his login/password to access his personal documents in order to share some of them with the other participants, take off his headset, i.e. "exit of the meeting even if the headset remains connected to it. Indeed, the user not only will no longer see or hear what is happening in the virtual meeting, but will also no longer be able to participate until he has put his headset back on. Ideally, the virtual reality experience should be immersed in the headset at all times.

In the case of the standalone headset, the user does not have a physical keyboard to easily enter authentication information. Admittedly, it is possible to display a virtual keyboard to allow the user to enter their authentication information, but the interaction is not as natural as with a real keyboard, causing authentication errors.

Disclosure of Invention

One of the aims of the present invention is to provide improvements over the state of the art.

An object of the invention is a device for authenticating a user of a virtual reality headset, the authentication device comprising an analyzer capable of verifying whether an image relating to at least one element of a real environment captured by the virtual reality headset corresponds to a reference datum stored in association with an identifier of the user of the virtual reality headset.

Thus, the use of the virtual reality headset can be linked to the room in which the headset is located. We will thus speak of authentication by means of the fingerprint of the part, visual imprint of the part (for example: recognition between one or more recorded images of the part and one or more captured images).

Alternatively, the authentication will possibly be a function not of a password made up of letters or numbers but of objects. Objects corresponding to images of these objects picked up according to directions looked by the user to compose the object password.

Advantageously, the authentication device comprises a model generator of elements of a real environment, the model generator is capable of determining a model of the element corresponding to the captured image.

Thus the analysis is carried out not on an image but on one or more models generated from the image: the model is in particular a plan of the part, a plan of one or more objects identified in the part... The use of model rather than images makes it possible to reduce the computational costs for verification.

Advantageously, the authentication device includes a computer capable of implementing image recognition, the computer provides one result from among the following:

- the result of the verification of the correspondence between the relative image of the element captured with the reference data to the analyzer;

- a model of the element to the model generator.

Thus, the analyzer is based on data obtained from the image captured with greater precision, thus reducing authentication errors (in particular the hotel room phenomenon, i.e. a room similar, which would possibly generate erroneous authentications: false positives, with a system in particular based on a simple modeling of the real environment and/or of one or more objects found there).

Advantageously, the authentication device comprises a controller of at least one sensor of the virtual reality headset, the controller being capable of triggering the sensor supplying an image of an element of a real environment captured to the authentication device.

Thus, the camera can be triggered by the authentication device, in particular when the camera is oriented in a predetermined direction, in particular associated with the reference data or when the framing of the real environment by the camera corresponds to that of the image of the data. reference. This avoids human authentication errors.

Advantageously, the authentication device comprises a generator of guide information according to the identifier of the user, the generator supplies the guide information to the virtual reality helmet, the guide information is able to be used to orient the virtual reality headset in a direction associated with the user's identifier.

Thus, the camera is positioned in the same direction as that which allowed the memorization of the reference data, thus reducing the costs of analysis calculations and refusals of authentication. erroneous: false negatives related to the fact that, for example, the captured image will be slightly offset on one side compared to the image used by the reference data omitting an element: furniture, component of the room (window, door, corner, hanger...).

Advantageously, the analyzer is able to check whether a series of images relating to elements of a real environment captured corresponds to a series of reference data stored in association with an identifier of a user requiring authentication.

Thus, authentication is strengthened because it does not depend on a single image. In addition, the use of a series of images makes it possible to use as authentication data a word that is not alphanumeric or a sentence that is not made up of words but of images or objects present in the real environment. For example, the password according to the invention could be a chair, a plant, a door and an animal appearing on a poster, all of these elements being in the room, that is to say the environment real. Thus, the virtual reality headset can only be used in the rooms for which the user has registered.

Advantageously, the element is one of the following elements:

- an object placed in the real environment,

- an area of the real environment.

Advantageously, the reference data is at least one type of data among the following:

- a reference image;

- a reference model of the part and/or an object of a real environment;

- a reference plane of a part of a real environment

Another object of the invention is a method for authenticating a user of a virtual reality headset, the authentication method comprising

- check whether an image relating to at least one element of a real environment captured by the virtual reality headset corresponds to reference data stored in association with an identifier of the user of the virtual reality headset.

Advantageously, the user identifier is stored in association with several distinct reference data corresponding to distinct real environments.

Advantageously, the verification includes a comparison among the following:

- a comparison with one of the stored reference data corresponding to a location of the virtual reality headset during authentication;

- a comparison with all the stored reference data. An object of the invention is also a device for recording a user of a virtual reality headset, the recording device comprising a recorder of reference data in association with an identifier of the user of the headset virtual reality, the reference datum corresponding to an image relating to at least one element of a real environment captured by the virtual reality headset during recording.

Another object of the invention is a virtual reality headset comprising:

- a device for recording a user of a virtual reality headset capable of memorizing, in association with an identifier of the user of the virtual reality headset, a first reference datum, the reference datum corresponding to an image relating to at least one element of a real environment captured by the virtual reality headset during recording, and

- an authentication device capable of verifying whether an image relating to at least one element of a real environment captured by the virtual reality headset corresponds to the reference datum stored in association with the identifier of the user of the headset virtual reality.

An object is still a method for registering a user of a virtual reality headset, the registration method comprising

- storing in association with an identifier of the user of the virtual reality headset a first reference datum, the reference datum corresponding to an image relating to at least one element of a real environment captured by the virtual reality headset during the record.

Advantageously, the recording method comprises, during a first use of the virtual reality headset in a second real environment, a repetition of the memorization step for the user for a second reference datum.

Advantageously, according to an implementation of the invention, the various steps of the method according to the invention are implemented by computer software or program, this software comprising software instructions intended to be executed by a data processor of a authentication device and/or a recording device and being designed to control the execution of the various steps of this method.

The invention therefore also relates to a program comprising program code instructions for the execution of the steps of the authentication method and/or a registration method when said program is executed by a processor.

This program can use any programming language and be in the form of source code, object code or intermediate code between source code and object code such as in a partially compiled form or in any other desirable form. Brief description of the drawings

The characteristics and advantages of the invention will appear more clearly on reading the description, given by way of example, and the figures relating thereto which represent:

Figure 1, a simplified diagram of an authentication device according to the invention,

Figure 2a, a simplified diagram of a first mode of implementation of the authentication device according to the invention,

Figure 2b, a simplified diagram of a second mode of implementation of the authentication device according to the invention,

Figure 3, a simplified diagram of a user registration process according to the invention,

Figure 4, a simplified diagram of an authentication method according to the invention,

Figure 5a, a simplified diagram of a first example of reference data used by the authentication device according to the invention,

Figure 5b, a simplified diagram of a second example of reference data used by the authentication device according to the invention.

Description of embodiments

By virtual reality helmet is meant any type of helmet or glasses comprising multimedia content reproducers, such as: screen(s), loudspeaker(s), etc. and allowing interaction of a user wearing the helmet with the multimedia content either directly by means of the helmet (for example the helmet being equipped with interaction buttons and/or one or more sensors: camera, microphone allowing the user wearing the headset to control interaction with the content reproduced by the headset.

By virtual reality headset is meant a virtual reality and/or augmented reality headset.

Figure 1 illustrates a simplified diagram of an authentication device according to the invention.

The authentication device 1, 21 is a device capable of authenticating a user U of a first virtual reality headset 2. The authentication device 1, 21 of a user U of a virtual reality headset 2 comprises a analyzer 11 capable of verifying whether an image relating to at least one element of a real environment ir erc captured by the virtual reality headset 2 corresponds to reference datum dr_vm stored in association with an identifier uid of the user U of the headset 2 virtual reality.

In particular, the reference datum dr_vm has been stored prior to the implementation of authentication by the authentication device 1, 21 and/or prior to an access request triggering authentication by the authentication device 1, 21 according to the invention.

In particular, the stored value dr_vm has been stored by a user recorder 7, 27 during a first access to a product or service requiring authentication. In particular, the authentication device 1, 21 comprises at least one receiver 10 of an icd image captured by the helmet 2. The receiver 10 receives the icd captured image coming, in particular, from a sensor 22, such as a camera, a 360° camera, an IR camera, etc. helmet 2 implemented in particular directly in helmet 2,

In particular, the authentication device 1, 21 comprises a model generator 15, 115 of elements of a real environment. The model generator 15, 115 is able to determine a model imo of the element corresponding to the captured image icd. Optionally, the template generator 15, 115 uses a template base 16, 116 to determine the imo template.

In particular, the authentication device 1, 21 comprises a computer 14, 114 capable of implementing image recognition. The computer 14, 114 notably performs image processing on the captured image icd. For example, the computer 14, 114 executing image processing by image recognition is able to provide the model generator 15, 115 or directly to the analyzer at least one model of an element mo(elt) present in the captured image icd. Optionally, the model generator 15, 115 generates a model of the real environment imo using one or more element models mo(elt) provided by the computer 14, 114. Additionally or alternatively, the computer 14, 114 compares by implementing image recognition the captured image icd and the image stored as reference datum dr vm.

In particular, the computer 14, 114 provides a result from among the following:

- the result rcg_tx of the verification of the correspondence between the relative image of the captured element with the reference data to the analyzer 11;

- a model of the mo(e/f) element to the model generator.

The result of the verification is in particular a precise correspondence rate (for example with pixel-by-pixel comparison, with color verification, etc.) or a coarse correspondence rate (for example with comparison of contrast lines, etc.).

In particular, the authentication device 1, 21 comprises a controller 12, 112 of at least one sensor 22 of the virtual reality headset 2. The controller 12, 112 is capable of triggering the sensor 22 providing an icd image of an element of a real environment captured erc to the authentication device 1, 21. In particular, the controller 12, 112 includes a comparator (not shown) able to compare a datum picked up by the helmet 2 with respect to a framing datum ded associated with the reference datum dr_vm of the user U.

In a first alternative, the framing datum ded is a geographical orientation (30°N for example) or an angle with respect to a reference point in real space (15° with respect to the user's axis U with the door)... In this case, the helmet 2 comprises at least one gyroscope able to provide an angle to True North or to a landmark. In the case of the landmark, the authentication device 1 will provide guide information ig to the helmet 2. In a first alternative, the helmet 2 will reproduce the guide information ig either on the screen 20 of the helmet 2 or at least headphones speakers 2. The guide information ig will ask the user U, for example, to position himself facing the landmark or with his back to the landmark. In a second alternative, the guide information ig will control the movement of the camera 22 of the helmet 2 until the latter is positioned opposite the reference point. Then, the user U will move or the controller 12 will command the movement of the camera 22. The controller 12 will then compare the angle of the captured datum de to the stored framing datum ded. When the angle of the captured datum de corresponds to the memorized framing datum ded, the controller 12 will trigger the capture of the image icd.

In a second alternative, the data captured from is an image captured by the camera 22 of the helmet 2 and the framing data ded is either the reference data dr_vm, or constituted by one or more landmarks in the image which is a function dr vm reference data. Thus, the controller 12 verifies whether the capture position of the captured image ccf is that of the image of the reference datum dr_vm and/or if the reference point(s) of the reference datum dr_vm are present in the data captured from. As soon as the verification is positive, the controller 12 triggers the camera 22 which captures the icd image allowing authentication. The camera 22 then provides the captured image icd to the authentication device 1, 21, and more specifically to the analyzer 11, 110.

In particular, the authentication device 1, 21 comprises a generator 19, 119 of guidance information ig(uid) according to the user identifier uid. The generator 19, 119 supplies the guidance information ig to the virtual reality headset 2. In particular, the guidance information ig is able to be used to orient the virtual reality headset 2 in a direction dir associated with the identifier of the user uid. Optionally, the guide information ig can be reproduced by the headset 2, for example by the screen 20 or loudspeakers (not shown).

In particular, the analyzer 11 is able to check whether a series of images {ir_erc(n)} _n =i...N relating to captured elements of a real environment corresponds to a series of reference data {dr_vm (n)}n=i...N stored in association with an identifier uid of a user U requiring authentication.

In the case where the reference data is a series of reference data values {dr_vm(n)}n=i...N, the guidance information ig allows the capture of a series of images {icd(n )} _n . For example, the guidance information will ask the user to first look at a chair, frame, window, etc. The analyzer 11 will determine that the authentication is positive ok_auth if the combination of the chair, the frame, the window looked at by the user U correspond to those recorded in the base 13, 113 as reference data {dr_vm(n) }n=i...N. In particular, the element is one of the following:

- an object placed in the real environment,

- an area of the real environment.

In particular, dr_vm reference data is at least one of the following data types:

- a reference image;

- a reference model of the part and/or an object of a real environment;

- a reference plane of a part of a real environment.

Figure 1 illustrates a particular embodiment of a recording device 7, 27 of a user U of a virtual reality headset 2. In this particular embodiment, the recording device 7, 27 and the authentication device 1, 21 are implemented in an electronic device (not shown) such that certain implemented elementary devices (10, 70), (12 , 112, 72), (13, 113, 73), (14, 114, 74), (15, 115, 75), (16, 116, 76) in this electronic device are shared by the recording device 7 , 27 and the authentication device 1, 21. For example, the recording device 7.27 and the authentication device 1, 21 both use at least one common device among the following: the captured image receiver 10.70, the model generator 15,115,75 , the image recognition computer 14,114,74, the controller 12,112,72, etc.

The recording device 7,27 comprises a recorder 18, 78 of dr_vm reference data in association with an identifier uid of the user U of the virtual reality helmet 2, the dr_vm reference data corresponding to a relative image im to at least one element of a real environment captured by the virtual reality headset 2 during recording.

In particular, the recording device 7, 27 comprises a coupler 17, 77 associating the identifier uid of the user U with the reference datum dr vm. The coupler 17, 77 is connected to the recorder 18, 78 to which it supplies the pair identifier-reference data (dr_vm, uid).

In particular, the recording device 7.27 comprises at least one receiver 70 of an image captured icm by the helmet 2. The receiver 10 receives the captured image icm originating, in particular, from a sensor 22, such as a camera, a 360° camera, an IR camera, etc. helmet 2 implemented in particular directly in helmet 2,

In particular, the recording device 7.27 comprises a model generator 75 of elements of a real environment. The model generator 75 is able to determine a model imo of the element corresponding to the captured image icm. Optionally, the template generator 75 uses a template base 76 to determine the imo template. In particular, the recording device 7.27 includes a computer 74 capable of implementing image recognition. The computer 74 notably performs image processing on the captured image icm. For example, the computer 74 executing image processing by image recognition is able to provide a model generator 75 or directly to the coupler 17, 77 at least one model of an element im present in the captured image icm . Optionally, the model generator 75 generates a model of the real environment imo using one or more models of elements mo(elt) provided by the computer 74.

In particular, the recording device 7.27 comprises a controller 72 of at least one sensor 22 of the helmet 2 of virtual reality. In the case where the authentication is carried out on the basis of a "fingerprint" of the real environment, the controller 72 is capable of triggering the sensor 22 providing an image icm or a series of images {icm(n)} _n to the recording device 7.27. For example, the footprint of the real environment can be an image systematically centered on the door of the room where the user U is located, or an image systematically taken when the user U is in a starting position of immersion planned in the real environment (suitable seat, secure area, etc.).

In particular, controller 72 sends headset 2 a recording request reg_rq. The user thus provides an identifier uid then orders the recording of the image icm or of the series of images {icm(n)} _n to be memorized as a “password”. Optionally, the recording request reg_rq guides the camera 22 and/or the user U in recording the images icm.

When the authentication is based not on the recognition of an object or a series of objects but of a "fingerprint" of the real environment, the recording device 7, 27 is able to record with the 'user identifier not a single dr_vm reference datum or series of reference data {dr_vm(n)} _n =i...N but several: for example a first dr_vm1 reference datum, a second dr_vm1 datum dr_vm2, ..., a lth reference datum dr_vml, or a first series of reference data {dr_vm1(n)} _n =i...N, a second series of reference data {dr_vm2(n)} _P = I...N, ... , a lth series of reference data {dr_vml(n)}n=i...N corresponding respectively to a first, a second, ... a lth real environment in which the user U uses the helmet 2. Thus, the authentication by "fingerprint" of the real environment, allows the user U to use the helmet in more than one distinct real environment.

In particular, the virtual reality headset 2 includes:

- a recording device 27 of a user U of a virtual reality headset 2 capable of memorizing, in association with an identifier uid of the user U of the virtual reality headset 2, a reference datum dr_vm, the reference datum corresponding to an image relating to at least one element of a real environment captured by the virtual reality headset 2 during recording, and

- an authentication device 21 capable of verifying whether an image ir erc relative to at least one element of a real environment captured by the virtual reality headset 2 corresponds to the stored reference datum dr_vm in association with the identifier uid of virtual reality headset 2 user U.

FIG. 1 illustrates the case of an autonomous virtual reality headset 2, that is to say embedding the operating device (not shown) of the headset, for example in the form of a processor executing instructions implementing implements a method of exploitation. The operating device comprises in particular a multimedia content calculator modified according to at least one multimedia content read in a content base and at least one interaction datum captured or detected. The content is a video game, audio and/or video content, interactive multimedia content, etc.

Figures 2a and 2b show different implementations of the authentication device 1, 21 according to the invention, in particular as illustrated by Figure 1.

Figure 2a illustrates a simplified diagram of a first mode of implementation of the authentication device 1, 21 according to the invention.

In this first mode of implementation, the authentication device 61 is implemented in an electronic device 6 possibly remote from the helmet 2. If the electronic device 6 is remote, it is connected to the helmet 2 via a communication network 3w, in particular a extended communication network or WAN for Wide Area Network in English such as an Internet network, a mobile communication network...

The electronic device 6 is in particular a personal electronic device placed at the home of the user U or a professional electronic device placed at the office of the user U while the user U with the headset 2 is located remotely, in particular in a residence secondary school, a rental, a hotel or on the premises of a partner, etc. , or a service provision server, such as a website, an application, a content provider (video on demand, Cloud, etc.)...

In particular, the electronic device 6 comprises an access provision device 62.

The user U uses the helmet 2 to request access to a service or a product from an access provision device, for example the device 62. The access provision device 62 requires the auth req authentication of the user U to the authentication device 61 according to the invention. Authentication device 61 receives at least one icd image. Then, the authentication device 61 checks whether the image relating to the real environment ir_erc (possibly consisting of the captured image received icd) corresponds to the reference datum dr_vm associated with the user U.

In particular, the electronic device 6 comprises a user recording device 67. The recording device 67 records a reference datum dr_vm in association with a user identifier uid for example in a user base (not illustrated).

In particular, the authentication device 61 retrieves the dr_vm reference datum which it uses to implement the verification in the user base in which it was previously recorded in association with the user identifier uid by the recording device 67.

In particular, if ok_auth is the case, the authentication device 61 activates the access provision device 62.

The access provider device 62 then gives access to the product or service to the first electronic device 2. For example, the access provider device 62 sends a reproduction signal to the headset 2 which reproduces the accessed service and/or an interaction menu with the product or service accessed. Thus, the headset 2 makes it possible to transmit an interaction signal si to the access provision device 62 as a function of the reproduction signal sr reproduced by the headset 2.

Figure 2b illustrates a simplified diagram of a second mode of implementation of the authentication device 241 according to the invention.

In this second mode of implementation, the authentication device 241 is implemented either in an electronic device 24 of which the headset 25 is a peripheral, or directly in a virtual reality system 2 comprising a peripheral 25, such as a virtual reality. The helmet 25 is connected to the electronic device 24 via a communication network 3L, in particular a local communication network composed either of a wired connection, in particular of the Ethernet or USB type, or either by a local wireless network.

Either the augmented reality system 2 or the electronic device 24 comprises - an authentication device 241 of the user of the virtual reality headset 25 capable of verifying whether an image relating to at least one element of a real environment ir erc captured by the virtual reality helmet 25 corresponds to a reference datum dr_vm stored in association with an identifier uid of the user U of the virtual reality helmet 25.

The electronic device 24 is in particular a personal computer or a tablet ... equipped with one or more peripherals: reproduction interface(s) such as a screen 21 _e and, where appropriate, a helmet 25 (comprising in particular a screen 21c and a sensor 22, such as a camera); input interface(s) such as a 23c keyboard, a 23s mouse, etc.

The user U uses the helmet 25 to request access to a service or a product from an access provision device. The access provision device requires authentication auth req from the user U to the authentication device 241 according to the invention.

The authentication device 241 receives at least one icd image. Then, the authentication device 61 checks whether the image relating to the real environment ir_erc (possibly consisting of the captured image received icd) corresponds to the reference datum dr_vm associated with the user U.

In particular, if ok_auth is the case, the authentication device 241 activates the access provision device.

The access provision device then gives access to the product or service to the virtual reality system 2 which reproduces the access provision using at least the headset 25.

In particular, the virtual reality system 2 comprises a user recording device 247. The recording device 247 records a reference datum dr_vm in association with an identifier of the user uid for example in a user base (not shown).

In particular, the authentication device 241 retrieves the dr_vm reference datum which it uses to implement the verification in the user base in which it was previously recorded in association with the user identifier uid by the recording device 247.

FIG. 3 illustrates a simplified diagram of a method for registering a user U according to the invention.

The registration process U_REG of a user U of a virtual reality headset CER comprises - storing MEM in association with an identifier uid of the user U of the virtual reality headset 2 a first reference datum dr_vm1, the first datum reference dr_vm1 corresponding to a relative image ir erc at least one element of a first real environment captured by the virtual reality headset 2 during recording.

Generally, a reference datum dr_vm corresponding to a relative image ir erc has at least one element of a real environment. Figure 1 uses this generic notation rather than those associated with a first reference datum dr_vm1, a second reference datum dr_vm2... a lth reference datum dr vml , and respectively with a first, a second... a lth environment real. The captured image icm received by the recording method U_REG is stored MEM directly or indirectly. In the case where the captured image is stored directly, the reference datum dr_vm consists of the captured image icm.

In particular, the recording process U_REG comprises, during a first use of the virtual reality headset 2 in a second real environment, a repetition of the memorization step for the user U for a second reference datum dr_vm2.

In particular, the U_REG registration process includes

- capture PIMG_CPT at least relative image ir erc to at least one element of a first real environment, the relative image ir erc to at least one element of a first real environment being stored MEM directly or indirectly as first datum of reference dr_vm1.

In particular, the user registration process U_REG includes the creation of access ACC_CREA, in particular when the access process implements the steps of the registration process U_REG.

In particular, the recording process includes a user identifier request UID_REQ which sends an identification message uid_mssg to the user U. The identification message uid_mssg is in particular capable of being reproduced by a reproduction interface.

Following the reproduction of the identification message uid_mssg, the user provides an input interface, such as an input interface: keyboard, mouse, stylus, touch screen... or a sensor: camera, microphone... .a user identifier uid. The user identifier uid is in particular a name, a nickname, an email address, an identifier of the user's terminal such as a telephone number, etc.

In particular, the U_REG recording method comprises an input of the user identifier UID_ENT receiving a signal uid_cpt from the input interface comprising a user identifier uid.

In particular, the capture PIMG_CPT of at least image relative im to at least one element of a first real environment includes a request to supply the access code, also called authentication code, PIMG_REQ which sends a registration message an authentication code pimg mssg intended for the user U. The message for recording an authentication code pimg mssg is in particular capable of being reproduced by a reproduction interface.

In particular, the recording method U_REG comprises a reception PIMG_REC of at least one captured image icm. In particular, the capture PIMG_CPT comprises the reception PIMG_REC of at least one captured image icm. In particular, the recording method U_REG comprises a modeling MD_GN of the captured image icm and/or of one or more elements present in the captured image icm. In particular, capture PIMG_CPT comprises modelization MD_GN.

In particular, the recording process U_REG comprises image recognition IMG_RCG of the captured image icm and/or of one or more elements present in the captured image icm. In particular, the PIMG_CPT capture includes the IMG_RCG image recognition.

In particular, the MD_GN modeling determines one or more models of the captured image and/or elements of the captured image as a function of irgd recognition data provided by the IMG_RCG image recognition.

In particular, the IMG_RCG image recognition recognizes one or more elements of the captured image according to imd models provided by the MD_GN modeling.

The PIMG_CPT capture provides a relative image im depending on the captured image received icm and/or the results imd, irgd of one or more treatments applied to this captured image received icm such as MD_GN modeling, image recognition IMG_RCG, etc

In particular, the U_REG recording process includes a location capture LOC_CPT. Thus, when the user U records a first reference datum dr_vm1, then a second reference datum dr_vm2, these can be stored with a location datum posm facilitating analysis by the authentication process.

In particular, the recording process U_REG comprises a reception LOC_REC of a first location datum posml corresponding to the first real environment prior to the recording MEM of the first reference datum dr_vm1. The storage MEM then includes the recording of the first reference datum dr_vm1 and the first location datum posml in association with the user identifier uid. Note that the first location datum posml and the first reference datum dr_vm1 are linked together in particular in the form of a couple. In particular, the location capture LOC_CPT comprises the reception of location data LOC_REC.

In particular, the recording method U_REG comprises a request LOC_REQ for location data which sends a request pos_rq to the headset CER, in particular in the form of a command intended for a location sensor of the headset (GPS sensor, NFC sensor or sensor of QRCode, etc. for example). For example, each real environment, in particular each room of an office building, can be equipped with an NFC tag and/or equipped with a QRCode identification. In particular, the location capture LOC_CPT includes the location data request LOC_REQ.

In particular, the recording method U_REG comprises a recording of the access code ACC_REG which comprises the storage MEM. In particular, the recording method U_REG, in particular the recording of the access code ACC_REG, comprises, prior to the storage MEM, an association ASS of one or more reference data dr_vm=im, {dr_vm(n) }n=i...N = {im(n)} _n with the entered user identifier uid and possibly the position or location data posm.

In particular, the recording of the access code ACC_REG verifies whether the access code requires a reference datum in addition to nw_vl?of the reference datum obtained dr_vm=im. If yes [Y], a new capture is triggered nw_trg n iterating n=n+1 the reference datum dr_vm(n).

Otherwise, the set of reference data dr_vm, {dr_vm(n} _n =i...N are provided directly to the storage MEM to be stored in association with the user identifier uid.

In particular, the ASS association provides a pair (uid, im)= (uid, dr_vm), (uid, {im(n)} _n) = (uid, {dr_vm(n}n=i...N) or a triple (uid, posm, im)= (uid, posm, dr_vm), (uid, posm, {im(n)} _n) = (uid, posm, {dr_vm(n}n=i...N ) to MEM storage.

In particular, the reference data dr_vm, {dr_vm(n} _n =i...N are stored in a user database BDU.

In particular, the authentication device 1 according to the invention and/or an access provision device 62 implements the steps of the U_REG recording method.

One embodiment of the U_REG registration method is in particular a program comprising program code instructions for the execution of the steps of the U_REG registration method and, optionally, of an authentication method when said program is executed by a processor.

Figure 4 illustrates a simplified diagram of an authentication method according to the invention.

The authentication method U_AUTH of a user U of a CER virtual reality headset comprises

- check PIMG_CMP, PIMG_VF if an image relative ir erc to at least one element of a real environment captured by the virtual reality headset CER corresponds to a dr_vm reference data stored in association with an identifier uid of the user U of the headset of virtual reality CER. In particular, the identifier uid of the user U is stored in association with several distinct reference data dr_vm1, dr_vm2...dr_vml corresponding to distinct real environments.

In particular, the PIMG_VF check includes a comparison among the following:

- a comparison with one of the stored reference data dr_vm corresponding to a location posd of the virtual reality headset CER during authentication;

- a PIMG_CMP comparison to all stored reference data ( dr_vm1 , dr_vm2...dr_vml) - not shown.

In particular, the authentication method U_AUTH comprises a determination PIMG_CLC of the relative image ir erc to at least one element of a real environment captured.

In particular, the U_AUTH authentication process includes

- recover PIMG_RLD at least one image relating to at least one element of a real environment captured ir erc.

In particular, the U_AUTH authentication process includes

- receive at least one icd captured image, the icd captured image being verified PIMG_CMP. For example, the PIM_REC recovery of a captured image is a reception of an icd captured image transmitted by the helmet 2. In particular, the recovery of the relative image PIMG_CLC comprises the reception of the captured image PIMG_REC.

In particular, the U_AUTH authentication method includes a request PIMG_REQ for providing the access code, also called authentication code, which sends a message for providing an authentication code pimg mssg to the user U The message for supplying an authentication code pimg mssg is in particular capable of being reproduced by a reproduction interface. In particular, the PIMG_REQ access code supply request is triggered pimg trg by the UID_ENT retrieval of the user identifier uid.

In particular, the recovery PIMG_LD of at least one image relating to at least one element of a real environment captured ir erc comprises a request PIMG_REQ for supplying the access code, also called authentication code, which sends a message of guidance ig mssg intended for the user U. The guidance message ig mssg is in particular capable of being reproduced by a reproduction interface.

In particular, the authentication method U_AUTH comprises a modeling MD_GN of the captured image icd and/or of one or more elements present in the captured image icd. In particular, determination PIMG_CLC comprises modelization MD_GN. In particular, the authentication method U_AUTH comprises image recognition IMG_RCG of the captured image icd and/or of one or more elements present in the captured image icd. In particular, the determination PIMG_CLC includes the image recognition IMG_RCG.

The PIMG_CPT capture provides a relative imd image depending on the received captured image icd and/or the imd, irgm results of one or more treatments applied to this received captured image icd such as MD_GN modeling, IMG_RCG image recognition, etc

In particular, the U_AUTH authentication process includes

- retrieve DR_LD a dr_vm reference data associated with the user identifier uid.

In particular, the U_AUTH authentication process includes

- read DR_RD at least one dr_vm reference datum, the dr_vm reference datum being used by the PIMG_CMP verification. For example, the reading DR_RD of a reference data item is performed according to the identifier of the user uid and, possibly a position picked up posd by the helmet 2. In particular, the recovery of reference data DR_LD comprises reading reference data. In particular, DR_RD reading is triggered dr trg by entering the user identifier UID_ENT.

In particular, reading DR_RD sends a request for associated reference data dr_req{ uid) to a memory device such as a user database BDU, also called user base, in which reference data has been previously stored. In response, the DR_RD read receives reference data associated with dr_vm from the BDU user database.

In particular, the DR_RD read transmits reference data associated pcr_vm read to the verification of the access code PIMG_VF. In particular, the request to supply the access code PIMG_REQ generates a guidance message ig mssg according to the reference data dr_vm read.

Thus, the user U can be guided by the guide message ig mssg to obtain the relative images ir erc constituting the access code. In particular, a method for accessing a service or a device receives an access request acc_req (not shown). In particular, the access request triggers an authentication request auth req prior to providing access by the access method.

In particular, the authentication method U_AUTH includes receiving an authentication request AUTH_REC (not shown).

In particular, the authentication method U_AUTH includes a user identifier request UID_REQ which sends an identification message uid_mssg to the user U. The identification message uid_mssg is in particular able to be reproduced by a reproduction interface . The user identifier request UID_REQ is notably triggered by the authentication request auth req.

In particular, the authentication method U_AUTH comprises an input of the user identifier UID_ENT receiving a signal uid_cpt from the input interface comprising a user identifier uid.

In particular, the authentication process U_AUTH comprises a reception of at least one captured image PIMG_REC. In particular, PIMG_LD recovery includes the reception of at least one PIMG_REC captured image.

In particular, the authentication process U_AUTH comprises a verification of the access code PIMG_VF which comprises the verification of reference data PIMG_CMP.

In particular, the PIMG_VF access code check verifies whether all code reference data has been captured n=N?. If not [N], a PIMG _LD retrieval of a new relative image is triggered nw_trg by iterating n=n+1 the relative image ir_erc(n).

In particular, if the PIMG_COMP reference data verification is positive [Y], i.e. if a relative image corresponds to the reference data: ir_erc(n) = dr_vm(n) then the verification of the number of of relative images n=N? is done.

Otherwise, i.e. if the PIMG_COMP reference data check is negative [N], if at least one relative image does not match any of the access code reference data: ir_erc(n) ¹ dr_vm(n) then the PIMG_COMP reference data check indicates a nauth authentication failure.

In particular, the reference data check PIMG_COMP receives a stored reference data dr_vm from the read DR_RD.

In particular, the nauth authentication failure terminates SPT_AUTH the U_AUTH authentication process. Eventually, the STP_AUTH authentication closure sends a failure message reproduced by the CER headset to the user.

In particular, the authentication closure STP_AUTH reinitializes the authentication process U_AUTH which then starts again with the user identifier request UID_REQ and/or the access code recovery PIMG_LD and/or the request to provide the authentication code PIMG_REQ.

In particular, the successful authentication indication ok auth is provided to an AXP access method (not shown), in particular an AXP access method having sent the authentication request auth req to the authentication method U_AUTH.

In particular, the successful authentication indication ok auth triggers validation of an AX_VLD access to a service or device. In particular, an AXP access method (not shown), such as an AXP access method having sent the authentication request auth req to the authentication method U_AUTH, comprises the access validation AX_VLD. The AX_VDL access validation controls ax_cmd the AXP access by the device requiring access, in our invention the first electronic device D', to a device or service.

In particular, the authentication device 1 according to the invention and/or an access provision device 62 implements the steps of the authentication method U_AUTH.

An embodiment of the U_AUTH authentication method is a program comprising program code instructions for the execution of the steps of the U_AUTH authentication method when said program is executed by a processor.

Figures 5a and 5b show the implementation of the authentication device 1, 21 according to the invention, in particular as illustrated by Figure 1, for different types of reference data.

Figure 5a illustrates a simplified diagram of a first example of reference data used by the authentication device 1, 21 according to the invention.

FIG. 5a illustrates the case where the reference data DR stored as access code in the user base 16 in association with the user identifier uid comprises an image of at least least a part of the environment or a modeling of a part of the environment, or even a plan of a part of the environment. For example, the reference datum DR constituted by a modeling of the environment comprises a modeling of objects 01, 02, 03, 04, such as a window model F reproduced twice (for the first and second objects 01 and 02) on the plane of the reference datum DR of figure 5a, a sofa model M corresponding to the third object of the plane of the reference datum DR of figure 5a, and a door model P corresponding to the fourth object 04 of the reference datum DR of FIG. 5a.

The user U wearing a virtual reality headset 2 identifies himself uid. Then, he positions himself in the environment to provide his access code in the form of an “image password” also called “environment fingerprint”. Camera 22 of helmet 2 photographs the real environment ER composed of a door PR, two windows FR1 and FR2 and a sofa MR. The ird image captured by the helmet 2 is transmitted to the authentication device 1 which has retrieved the reference data dr(uid) corresponding to the user. The authentication device 1 verifies whether these two pieces of information: reference datum dr(uid) corresponding to the user and captured image ird. In particular, the authentication device implements image recognition to compare the two pieces of information, or even models the captured image ird before comparing it to the reference data when the reference datum dr(uid) is a model.

Figure 5b illustrates a simplified diagram of a second example of reference data used by the authentication device 1, 21 according to the invention.

Figure 5b illustrates the case of an access code composed of a series of images or patterns taken in a predetermined order. The series of reference data previously stored in association with the user U indicates that the access code is a series of four images in our example.

In a first variant of the invention, the user U is invited to provide his image access code without further indication. The user must, as with an alphanumeric password, remember the number of images used and each object stored in the access code.

Thus, the authenticating user will place himself to photograph the component objects are image access code. In the example of figure 5b, he photographs by means of the camera 22 of the helmet 2 a window in a first time t0, a chair C in a second time t1, a painting in a third time t2 and a plant in a fourth time t3.

If the reference data making up the previously stored access code are models, the helmet 2 can be used with this same code in a real environment other than that used for the user's registration, provided that the objects are found. of the image access code in this new real environment. For example, the user registers in his office where these four photographed elements are then modeled to serve as reference data for the memorized access code. Then, he uses his helmet in his living room: instead of the office window, he captures an image of the living room French window; instead of the desk chair, he picks up an armchair there; instead of the poster of a planisphere, he captures a picture of an impressionist painting; and instead of a cactus, he captures an image of a shrub or even a tree (through the window). The authentication device 1 receiving these four images successively, models them as a window, seat, table, plant and compares them to the reference data. Here, there is correspondence between the series of captured images and the reference data, the authentication is therefore successful and access is authorized.

In a second variant of the invention, the user U can be guided to provide his image access code: number of images requested, see type of object. For example, the authentication device can ask the user to photograph a window F, a chair C or a seat, a painting T or a detail of a painting, and a plant P either without specifying the order or in the required order. In this case, the reference data will preferably be composed of an image captured framed on the objects selected by the user to compose his access code in order to reinforce the security of the access code.

Thus, the authenticating user will place himself to photograph the same window, the same chair, the same table and the same plant as when he registered. The authentication device 1 will for example perform image recognition to compare the images captured with the reference data.

In a non-illustrated variant of the invention, a real object allowing authentication is a personal object, such as a bag, a jewel, a tattoo, etc. Thus, the user will be able to authenticate everywhere since the authentication will be based on the capture of a personal object or even a series of personal objects or not. In addition, the user will be able to authenticate more quickly since, the object securing the authentication being personal, the capture of a single object will eventually suffice for authentication.

The principle of the invention is to use a capture of reality possible on certain virtual reality headsets to manage to transparently authenticate the user. Thus, when the user enters a virtual reality application asking to be authenticated, the cameras start filming reality, and the application asks the user to look around. Optionally, the application can represent in virtual reality the directions that the user's gaze must cover and those already observed.

From there, with conventional image recognition processes, the application determines the properties of the room surrounding the user: position of the walls, color of these, position of the frames, position and size of flat surfaces such as desks or shelves, the position of screens, ... From this information, the application can define a partial map of the room surrounding the user.

The first time the user uses the application in this place, this map and a unique identifier of the headset are saved to create a fingerprint of this place, and the user associates it with his account (by identifying himself with a conventional means, other than the invention).

The following times, we compare this map with the previous maps saved for this helmet. If there is a match, we can authenticate the user without further actions on his part.

The correspondence between maps requires different precision depending on the recognized elements: a significant correspondence will for example be expected for the position or the color of the walls and furniture (desk or shelf type), while a certain displacement tolerance will for example be accepted for items like a screen

The invention also relates to a support. The information carrier can be any entity or device capable of storing the program. For example, the medium may include a storage medium, such as a ROM, for example a CD ROM or a microelectronic circuit ROM or else a magnetic recording medium, for example a floppy disk or a hard disk.

On the other hand, the information medium can be a transmissible medium such as an electrical or optical signal which can be conveyed via an electrical or optical cable, by radio or by other means. The program according to the invention can in particular be downloaded onto a network, in particular of the Internet type.

Alternatively, the information carrier may be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method in question.

In another implementation, the invention is implemented using software and/or hardware components. From this perspective, the term module can correspond either to a software component or to a hardware component. A software component corresponds to one or more computer programs, one or more sub-programs of a program, or more generally to any element of a program or software capable of implementing a function or a function set as described above. A hardware component corresponds to any element of a hardware assembly capable of implementing a function or a set of functions.

Claims

1. Device for authenticating a user of a virtual reality headset, the authentication device comprising an analyzer capable of verifying whether an image relating to at least one element of a real environment captured by the virtual reality headset corresponds to a reference datum stored in association with an identifier of the user of the virtual reality helmet.

2. Authentication device according to the preceding claim, characterized in that the authentication device comprises a model generator of elements of a real environment, the model generator is capable of determining a model of the element corresponding to the captured image.

3. Authentication device according to any one of the preceding claims, characterized in that the authentication device comprises a computer able to implement image recognition, the computer provides a result from among the following:

- a model of the element to the model generator.

4. Authentication device according to any one of the preceding claims, characterized in that the authentication device comprises a controller for at least one sensor of the virtual reality headset, the controller being capable of triggering the sensor providing an image of an element of a real environment picked up at the authentication device.

5. Authentication device according to any one of the preceding claims, characterized in that the authentication device comprises a guide information generator depending on the user identifier, the generator provides the guide information to the virtual reality headset, the guidance information is able to be used to orient the virtual reality headset in a direction associated with the identifier of the user.

6. Authentication device according to any one of the preceding claims, in which the analyzer is able to check whether a series of images relating to elements of a real environment captured corresponds to a series of reference data stored in association with an identifier of a user requiring authentication.

7. Authentication device according to any one of the preceding claims, characterized in that the reference data is at least one type of data among the following:

- a reference image;

- a reference model of the part and/or an object from a real environment;

- a reference plane of a part of a real environment

8. Method for authenticating a user of a virtual reality headset, the authentication method comprising

- check whether an image relating to at least one element of a real environment captured by the virtual reality headset corresponds to a reference datum stored in association with an identifier of the user of the virtual reality headset.

9. Authentication method according to the preceding claim, characterized in that the user identifier is stored in association with several distinct reference data corresponding to distinct real environments.

10. Authentication method according to the preceding claim characterized in that the verification includes a comparison among the following:

- a comparison with all the stored reference data.

11. Device for recording a user of a virtual reality headset, the recording device comprising a recorder of reference data in association with an identifier of the user of the virtual reality headset, the data of reference corresponding to an image relating to at least one element of a real environment captured by the virtual reality headset during recording.

12. Virtual reality headset comprising:

13. A method of registering a user of a virtual reality headset, the registration method comprising

14. Recording method according to the preceding claim, characterized in that the recording method comprises, during a first use of the virtual reality headset in a second real environment, a repetition of the memorization step for the user for a second reference datum.

15. Program comprising program code instructions for the execution of the steps of the authentication method according to any one of claims 8 to 10 and/or a recording method according to any one of claims 13 or 14 when said program is executed by a processor.