digit is
blurry then you still win because 10^(n-1) is 1.
if two are unknown then mr nasty could try buying stuff from
10 diferent sites.
brucee
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Blanking out all but the last 4 digits is foolish. The last is a checksum
and the first four are determined by the merchant. This greatly reduces
the possibilities for the other 8 digits. I'd rather just Bank Name or even
the first 4 digits. (I know that amex use only 15, even worse.)
b
The facts are very scrambled but I like it.
The brief TV reports from lawyers were more factual.
Motorist wins case after maths whizzes break speed camera code
Sydney Morning Herald
By Andrew Clark
August 11, 2005
A team of Chinese maths enthusiasts have thrown NSW's speed cameras
system into di