Actually, color copiers, for years well before 1995, had a special “flag” that noted the time-n-date of when certain “greens” were copied.  The SecretService would often make special little trips to these copiers to check for flags.

Counterfeits happen a lot more than people think.
Iran and Syrian, for example, are understood to account for most of the fake US currency both domestic and international.

Before that?  The Third Reich produced more fake US and UK currency than all other producers combined, during its existance that is, with the help of Jewish slave labour.

rob@egoz.org

Reminds me of the NSA backdoor that “somehow” got included in WinNT.

I read about this yesterday and a couple of thoughts occurred to me. What happens in the event that someone makes one of these copies on one machine then turns around and copies that copy on a diferent machine? Does the new copy have the serial number for both machines embedded? Is the serial number always embeded in the same place? If so, would the two serial numbers overlay each other thus obscuring both?

BTW Les- I tried to sign up for an SEB account earlier this morning and still haven’t received the activation email. Thought I’d let you know as it’s been a few hours now.