Abstract: Apparatus and methods for manufacturing and reading the apparatus is disclosed. The apparatus includes: a storage medium (610) comprising a first material; and a printed electronic circuit (104) coupled to the storage medium, the printed electronic circuit comprising a first portion (206) that includes a plurality of printed electronic circuit elements that generate a secret code, wherein the secret code is based on an electronic characteristic of each circuit element as randomly set by a parameter of at least one semiconductor ink used to generate the printed electronic circuit.

Publication number: 20070130490
Type: Application
Filed: December 2, 2005
Publication date: June 7, 2007
Inventors: Shmuel Silverman, Timothy Collins, Robert Perri