Hacking Flash Memory

The major feature we are concerned about from a security point of view is that you cannot infinitely rewrite it. With normally memory and normal hard-disks, you can rewrite the contents trillions of times without concern. With flash memory, after rewriting data a few hundred thousand times, the block goes bad. It's quite easy to intentionally write a program that would continuously overwrite a block of flash until it failed.

Read the article HERE.