Abstract: Systems, methods and sensors detect changes in incident optical radiation. Voltage is applied across one or more active areas of a detector while the incident optical radiation illuminates the active areas. Current is sensed across one or more of the active areas, a change in the current being indicative of the changes in incident optical radiation.

Abstract: Various aspects of the invention provide systems and methods for verifying the authenticity of a product. One aspect of the invention provides a method of verifying the authenticity of a product through a plurality of stages of a supply chain. The method includes: providing a product having a plurality of distinct hidden unique identifiers incorporated with the product; and at each of at least one of the plurality of stages of the supply chain, verifying the authenticity of a revealed unique identifier, thereby verifying the authenticity of the product. Another aspect of the invention provides a product including a plurality of distinct hidden unique identifiers. The plurality of distinct unique identifiers can be selectively revealed. Another aspect of the invention provides a tamper-evident package including a plurality of distinct hidden unique identifiers. The plurality of distinct unique identifiers can be selectively revealed.

Abstract: Various aspects of the invention provide systems and method for verifying authenticity of a product. Another aspect of the invention provides a system including: a tamper-evident package; and a unique identifier usable to verify the authenticity of the product, the unique identifier contained within the tamper-evident package. The unique identifier cannot be detected from outside of the tamper-evident package without demonstrating evidence of tampering. Another aspect of the invention provides a system including: a tamper-evident package; and a concealed unique identifier coupled to the tamper-evident package. Another aspect of the invention provides a method of providing a providing a unique identifier. The method includes: providing a tamper-evident package; and placing the unique identifier within the tamper-evident package, wherein the unique identifier cannot be detected from outside of the tamper-evident package.

Abstract: Systems, methods and sensors detect changes in incident optical radiation. Voltage is applied across one or more active areas of a detector while the incident optical radiation illuminates the active areas. Current is sensed across one or more of the active areas, a change in the current being indicative of the changes in incident optical radiation.

Abstract: Systems and methods for authorising distribution networks through mutual dependency of unit item authentication and batch authentication are provided through cascading authentication along the product packaging characteristics.

Abstract: Systems, methods and sensors detect changes in incident optical radiation. Current is driven through one or more active areas of a detector while the incident optical radiation illuminates the active areas. Voltage is sensed across one or more of the active areas, a change in the voltage being indicative of the changes in incident optical radiation.