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RE: Sandisk SD card can store tamper-proof photos for 100 years
de-void-21165590650301806002836337787023 23rd Jun 2010
@kd5auq - I think it a pretty safe bet that if the Japanese police are using this that they've been through this technology VERY thoroughly. The JPN force are a REALLY serious organization.

Chances are that they're using some form of self harming diode on the write-line junction on each page - once the device has completed writing a page, the write line blows and the contents of that page can no longer be changed.
ie8 fix

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