Dotz Nano Limited (DTZ, formerly Northern Iron Limited) is a technology leader in research, production and marketing of anticounterfeiting, authentication, and tracing solutions. Its products ValiDotz, BioDotz, Fluorensic and InSpec are solutions for applications, such as: anti-counterfeiting, brand & reputation protection, oil & gas industry, liquids tagging, lubricants and DEF authentication, polymers tagging and bio-imaging.