to address counterfeit problems , for example , we propose a secure , flexible , and cost - effective authentication solution that can be integrated into conventional distribution logistic systems . the proposed solution for product authentication and distribution channel validation comprises three major components : 1 ) machine - readable raman - active chemical taggant ; 2 ) a taggant reader ; and 3 ) a taggant eraser . the proposed solution is to control and validate the distribution channel by authenticating the origin of products . authentication is accomplished by verification of distinct taggants associated with the articles , such as on its label , along with other product distribution information in optical , spatial - encoding indicia , such as a barcode . the taggant information is used to identify , validate , and distinguish the origin of the source of the articles , such as goods or products . the taggant material is thereafter rendered unreadable by modifying the taggants to make obtaining the information unfeasible , thereby controlling the taggants &# 39 ; lifecycle .