1. An apparatus comprising: a memory configured to store first authentication information; and one or more processors configured to incorporate, using a transform domain, the first authentication information into a digital representation from which an analog form can be made, wherein the first authentication information is preserved in the analog form for comparison with semantic information carried by the analog form, wherein the first authentication information may be retrieved from the analog form and compared with the semantic information in the analog form to determine authenticity of the analog form.