Memory cleaner has been included in most OS's for quite some time. It works in conjuction with Content Protection. All Memory Cleaner does is scrub the already free memory so that old data can't be recovered from it. As with most memory the memory isn't really deleted when no longer in use. It's just marked as writable again. So, theoretically, someone could disassemble the device and read what was "deleted" from the device. The Memory Cleaner actually writes over it again so that the deleted info can't be read, ever.
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