Abstract: A method and system are described for protecting a manufactured item from counterfeiting. The manufactured item, which is marked with an identifier, such as a serial number, is associated with a code generator that has secret functions and data for generating verification codes. The manufactured item is then supplied along with the corresponding code generator. Thereafter, the identifier from the manufactured item and the verification code generated by the code generator are used to verify authenticity of the manufactured item.

Abstract: In a method and system for providing product safety to a manufactured item, a verification code is associated with the manufactured item. The verification code is initialized to an unvalidated state. The manufactured item is then supplied with this verification code hidden from view. The verification code may be exposed by a user and submitted to a validation service for validation for any number of occasions. In response to the validation service receiving the verification code for validation, the user is provided with an indicator of a current state of the verification code. A first successful validation of the verification code is then used as an event that triggers a state transition of the verification code from the unvalidated state to a validated state.