Virtual Numeric Tokens: Roger G. Johnston Ph.D.

new approaches (2003)

Imagine an anti-counterfeiting tag that:

Is inexpensive & unobtrusive.

Is very difficult to counterfeit in large numbers.

Can be automatically checked by wholesalers, retailers, or volume end users (with an inexpensive reader).

Can be checked by consumers (without a reader).

Typically detects more than 98% of the fakes examined.

Effectiveness scales automatically with the level of concern.

Does not become easier to defeat over time, or as technology advances.