Abstract: A device and method for authenticating a user of a wearable biometric device. The method involves performing an initial biometric authentication of the user, the authentication being based on biometric features extracted from one or more image frames corresponding to a first portion of the user's hand and/or wrist, captured with a camera of a wearable device. A second part of the authentication method involves either re-confirming the initial biometric authentication of the user or verifying the liveness of the user or both re-confirming the authentication and verifying the liveness. The second step of the method is based on at least a measure of a second portion of the user's hand or wrist taken when the wearable device is worn against the user's hand or wrist. A notable part of the method is that the initial biometric authentication is performed by temporarily moving the camera away from the first portion of the user's hand and/or wrist.

Abstract: A biometric sensor for detecting wrist blood vessels in a wristband or wristwatch. The sensor has a substrate and an array of thermal detectors arranged on the substrate. Suitable detectors include near infrared photodetectors or temperature detectors. Advantageously, the array has printed organic components on the substrate.

Abstract: A biometric sensor apparatus for authenticating a user using images (1) of patterns of blood vessels (30) of the user, comprising: a wrist strap (12); a clasp (4); a camera (3) arranged for capturing said images; a mechanism for detecting an opening of said clasp (4); a module programmed for authenticating said user when said images match reference images of said user, and for revoking said authentication when an opening of the clasp has been detected.

Abstract: A biometric sensor apparatus for capturing patterns of blood vessels on the inner side of a wrist. The sensor apparatus has a strap with a near infrared camera mounted on a part of the strap. The camera is arranged for capturing an image of the blood vessels when it is temporarily held at an increased distance from the wrist than when the apparatus is simply being worn by the user. In some embodiments the camera is held at the required position for capturing the images of the blood vessels when the wrist strap is being opened or closed. In some embodiments the camera may be mounted in a deployant clasp of the wrist strap.

Abstract: The present invention concerns a method for authenticating a user, comprising: an initial biometric authentication of the user, based on biometric features extracted from one or a plurality of image frames corresponding to a first portion of the user's hand and/or wrist, captured with a camera (12) of a wearable device (10); a subsequent step of confirming said biometric authentication of the user and/or verifying his liveness, based on at least a measure of a second portion of the user's hand or wrist made when said wearable device is worn against the user's hand or wrist; the surface of said second portion being smaller than the surface of said first portion.

Abstract: A biometric sensor apparatus for authenticating a user using images (1) of patterns of blood vessels (30) of the user, comprising: a wrist strap (12); a clasp (4); a camera (3) arranged for capturing said images; a mechanism for detecting an opening of said clasp (4); a module programmed for authenticating said user when said images match reference images of said user, and for revoking said authentication when an opening of the clasp has been detected.

Abstract: A biometric sensor apparatus for capturing patterns of blood vessels on the inner side of a wrist, comprising: a portion of wrist strap; a near infrared camera mounted on said portion and arranged for capturing said patterns when said portion is held at a distance of said wrist during closure or opening of the wrist strap. The apparatus may further comprise an illuminating unit for illuminating a portion of said inner side. The camera may be mounted in a deployant clasp.

Abstract: A biometric sensor for detecting wrist blood vessels in a wristband or wristwatch, said sensor comprising a substrate and an array of thermal detectors on said substrate, such as near infrared photodetectors or temperature detectors, wherein said array comprises printed organic components on a substrate.