Private display for head mountable device authentication
In an example implementation according to aspects of the present disclosure, a XR system comprises an HMD which includes an HMD display and a motion detection device, an external display of a computing device, and a processor operatively coupled with a computer readable storage medium and instructions stored on the computer readable storage medium that, when executed by the processor, direct the processor to detect an activation of a privacy mode; display, by the HMD display, a first series of images to a user of the HMD; display, by the external display, a second series of images to other users; capture, by the motion detection device, movements of the user selecting a sequence of images of the first series of images displayed on the HMD display; and authenticate the user based on the movements of the user.
1 . A method of authorizing a user of a head mountable device (HMD), comprising:
displaying a first plurality of authentication images on a private display of the HMD and a public display of an external computing device coupled to the HMD;
detecting an enablement of an authentication mode for the user;
in response, displaying a second plurality of authentication images on the private display of the HMD, wherein the first plurality of authentication images are displayed in different locations than the second plurality of authentication images;
detecting, by a motion detection device of the HMD, user gestures indicating a selection of a sequence of images of the second plurality of authentication images; and
authorizing the user based on the selection of the sequence of images of the second plurality of authentication images.
2 . The method of claim 1 , wherein the HMD is tethered to the external computing device, and further comprising:
the external computing device generating the first plurality of images to be displayed on the public display of the external computing device and the second plurality of images to be displayed on the private display of the HMD; and
the external computing device transferring the second plurality of images to the HMD to be displayed on the private display of the HMD.
3 . The method of claim 1 , wherein the HMD comprises an All-In-One (AIO) headset and further comprising:
the HMD generating the first plurality of images to be displayed on the public display of the external computing device and the second plurality of images to be displayed on the private display of the HMD; and
the HMD transferring the first plurality of images to the external computing device to be displayed on the public display of the external computing device.
4 . The method of claim 1 , wherein the HMD includes an inertial measurement unit (IMU) to detect the user gestures indicating the selection of the sequence of images of the second plurality of images.
5 . The method of claim 4 , wherein the IMU includes a three degrees of freedom (3DoF) IMU to measure rotational movements performed by the user.
6 . The method of claim 4 , wherein the IMU includes a six degrees of freedom (6DoF) IMU to measure rotational movements and translational movements performed by the user.
7 . The method of claim 1 , wherein detecting the user gestures comprises detecting a head gesture by the user of the HMD.
8 . The method of claim 1 , wherein detecting the user gestures comprises detecting a hand gesture by the user of the HMD.
9 . The method of claim 1 , wherein the second plurality of images comprises a series of numbers or symbols which are randomly placed each time the user is authenticated.
10 . The method of claim 1 , wherein the enablement of the authentication mode is triggered by the user or by an application running on the HMD or the external computing device.
11 . The method of claim 1 , wherein authorizing the user comprises comparing the detected user gestures to a movement authentication pattern associated with the user.
12 . An extended reality (XR) system, comprising:
a head mountable device (HMD) comprising:
an HMD display; and
a motion detection device;
an external display of a computing device, wherein the computing device is communicately coupled to the HMD; and
a processor operatively coupled with a computer readable storage medium and instructions stored on the computer readable storage medium that, when read and executed by the processor, direct the processor to:
detect an activation of a privacy mode;
display, by the HMD display, a first series of authentication images to a user of the HMD;
display, by the external display, a second series of authentication images to other users;
capture, by the motion detection device, movements of the user selecting a sequence of images of the first series of authentication images displayed on the HMD display; and
authenticate the user based on the movements of the user.
13 . The XR system of claim 12 , wherein the first series of authentication images includes numbers or symbols located in different locations than the second series of authentication images.
14 . The XR system of claim 12 , wherein the first series of authentication images are randomized each time the user of the HMD is authenticated.
15 . The XR system of claim 12 , wherein motion detection device comprises an inertial measurement unit (IMU) to detect a user head gesture.
16 . The XR system of claim 12 , further comprising hand controllers to detect user hand gestures indicating the selected sequence of images of the first series of images displayed on the HMD display.
17 . The XR system of claim 12 , wherein the HMD comprises a stereoscopic head-mounted display configured to provide separate images to the user of the HMD from images displayed to other users on the external display.
18 . The XR system of claim 12 , wherein the processor is further configured to detect that the HMD has been removed from the user and, in response, re-trigger authentication and end a current session.
19 . A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to:
detect an activation of a user authentication mode;
display, by an HMD display, an authentication screen including a randomized series of authentication images to a user of the HMD;
display, by an external display of a computing device, a dummy screen including a standardized series of authentication images to other users;
capture, by a motion detection device of the HMD, movements of the user selecting a sequence of images of the randomized series of authentication images displayed on the HMD display; and
authenticate the user based on the movements of the user.
20 . The non-transitory computer-readable storage medium of claim 19 , wherein the randomized series of authentication images comprises numbers or symbols located in different locations than corresponding numbers or symbols of the standardized series of authentication images.