The PCGS Secure Plus process, will it work?

It sounds good in theory and I visited the site of Coinsecure who is helping implement it:
http://www.coinsecure.com/intro.htm
but I'm not sure if its a 100% fool proof?
PCGS say:
"Developed after extensive software and hardware development and testing in partnership with Coinsecure, Inc. of Palo Alto, California, the PCGS Secure Plus service digitally captures a unique "fingerprint" of each coin that is then entered into a permanent database."
Coinsecure says:
"This gives each coin an individual identity that is permanently linked to the physical coin attributes."
My worry is that some coins might "turn" after being holdered and thus not be correctly identified by the scanner.
As we know the holders aren't 100% air tight and coins have been known to tone and develop spots after holdering.
For example if you scan a coin that has developed a little toning around the edges since being holdered and having been scanned will the scanner not believe it to be a different coin if re-scanned?
http://www.coinsecure.com/intro.htm
but I'm not sure if its a 100% fool proof?
PCGS say:
"Developed after extensive software and hardware development and testing in partnership with Coinsecure, Inc. of Palo Alto, California, the PCGS Secure Plus service digitally captures a unique "fingerprint" of each coin that is then entered into a permanent database."
Coinsecure says:
"This gives each coin an individual identity that is permanently linked to the physical coin attributes."
My worry is that some coins might "turn" after being holdered and thus not be correctly identified by the scanner.
As we know the holders aren't 100% air tight and coins have been known to tone and develop spots after holdering.
For example if you scan a coin that has developed a little toning around the edges since being holdered and having been scanned will the scanner not believe it to be a different coin if re-scanned?
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