Abstract: A method and system for authenticating a user. An expected digital representation of an iris of at least one authentic user is a combination of a first digital representation of an iris of an eye of at least one authentic user and a second digital representation of at least one authentic overlay pattern. In response to a determination that a third digital representation of a captured image of an iris of a user to be authenticated does not match the expected digital representation: the expected digital representation is modified to alter a relative rotational alignment between the representation of the at least one authentic overlay pattern and the expected digital representation of the iris; and a further comparison between the modified expected digital representation and the third digital representation is performed. From the further comparison, an authentication signal indicative of whether authentication of the user has been successful is generated.

Abstract: A method and system for authenticating a user. An expected digital representation of an iris of at least one authentic user is a combination of a first digital representation of an iris of an eye of at least one authentic user and a second digital representation of at least one authentic overlay pattern. In response to a determination that a third digital representation of a captured image of an iris of a user to be authenticated does not match the expected digital representation: the expected digital representation is modified to alter a relative rotational alignment between the representation of the at least one authentic overlay pattern and the expected digital representation of the iris; and a further comparison between the modified expected digital representation and the third digital representation is performed. From the further comparison, an authentication signal indicative of whether authentication of the user has been successful is generated.

Abstract: A method and system for authenticating a user. An expected digital representation of an iris of at least one authentic user is generated, by combining a first digital representation of an iris of an eye of at least one authentic user with a second digital representation of at least one authentic overlay pattern. In response to a determination that a third digital representation of a captured image of an iris of a user to be authenticated does not match the expected digital representation: the expected digital representation is modified to alter a relative rotational alignment between the representation of the at least one authentic overlay pattern and the expected digital representation of the iris; and a further comparison between the modified expected digital representation and the third digital representation is performed. From the further comparison, an authentication signal indicative of whether authentication of the user has been successful is generated.

Abstract: A method and system for authenticating a user. An expected digital representation of an iris of at least one authentic user is generated, by combining a first digital representation of an iris of an eye of at least one authentic user with a second digital representation of at least one authentic overlay pattern. In response to a determination that a third digital representation of a captured image of an iris of a user to be authenticated does not match the expected digital representation: the expected digital representation is modified to alter a relative rotational alignment between the representation of the at least one authentic overlay pattern and the expected digital representation of the iris; and a further comparison between the modified expected digital representation and the third digital representation is performed. From the further comparison, an authentication signal indicative of whether authentication of the user has been successful is generated.

Abstract: A method and system for authenticating a user. A first digital representation of an iris of an eye of at least one authentic user is obtained. A second digital representation of at least one authentic overlay pattern is obtained. A third digital representation of a captured image of an iris of a user to be authenticated is obtained, where the iris of the user has been overlaid with a contact lens including a further overlay pattern thereby creating an image composed of the iris of the user and the further overlay pattern. An expected digital representation of an iris of at least one authentic user is generated, by combining the first and second digital representations. Authenticating the user is attempted by comparing the third digital representation with the expected digital representation. An authentication signal indicative of whether authentication of the user has been successful is generated based on the comparing.

Abstract: A method and system for authenticating a user. A first digital representation of an iris of an eye of at least one authentic user is obtained. A second digital representation of at least one authentic overlay pattern is obtained. A third digital representation of a captured image of an iris of a user to be authenticated is obtained, where the iris of the user has been overlaid with a contact lens including a further overlay pattern thereby creating an image composed of the iris of the user and the further overlay pattern. An expected digital representation of an iris of at least one authentic user is generated, by combining the first and second digital representations. Authenticating the user is attempted by comparing the third digital representation with the expected digital representation. An authentication signal indicative of whether authentication of the user has been successful is generated based on the comparing.