The safety of food products is a prime concern today. What with the recent spinach e coli outbreak, the not so old mad cow disease and other such scares, one cannot but feel scary. This is important for most people because eating is something that one can never avoid, unlike say, traveling by air.Hence anything related to food safety is very important for all of us. There are other cases in which food safety may not be an issue but traceability and credibility are. For instance, is there any way to verify that a package of “organically grown” spinach is not so, but has been plied with generous doses of all kinds of chemicals from sulfate fertilizers to toxic pesticides? Not at all. There is no way for example to verify whether the carton showing “California oranges” does actually originate from an orchard in California or a little known Chinese province.