unforgeable optical tokens?

[Hadmut Danisch]

On Sun, Sep 22, 2002 at 11:46:06AM -0700, bear wrote:
> 
> Here's a potential application: consider it as a door key. 


Maybe not for normal doors due to mechanical instability, but
for Hotel room doors.

My suggestion: Use it for vouchers, flight tickets, entrance tickets,
money notes, passports, license plates, tax stickers, ...


Hadmut




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