Patent ID: 7011245

Claim:
Authentication of articles, i.e. physical entities, by computer generated coding wherein: one invariant code is derived by algorithm in two parallel coding progressions, one fixed, the other flexible in reflecting data identifying both parties to a transaction of a physical entity, both said coding progressions utilize an item code (IC) unique to, generated by the maker of, and associated with the physical entity; both said coding progressions are related by use of public key encryption involving said one invariant code with the corresponding public key contained in public client software capable of processing data in accordance with the flexible coding progression; said flexible coding progression includes a software selected mathematical operator providing equivalence between two variable codes, which reflect data identifying both said parties, and said one invariant code; and matching of said invariant code derived by said flexible coding progression with said invariant code derived by said fixed coding progression provides mathematical verification of the identity of the maker, the article concerned, and two parties to a transaction of said article.