>If a thief breaks in to a home by breaking the door, the broken door is still evidence of a break-in. Let the addition of keys have a noticeable effect
Err, security is about preventing attacks -- not about having evidence that they've happened.
By preventing attacks I meant preventing them from being successful -- not preemptively preventing them from happening.
Besides, select "foil", right click "Look up": (OS X Dictionary): prevent
So, not a native speaker, and there might still be some nuance of preventing from even being considered (avert?) in "foil", and you could be technically correct.
I meant the difference between protecting your data from destruction and securing your data against exfiltration.
The former is trivially defeated (just breaking the phone, for example, is much quicker and less involved than forcing a factory reset), and not what we were talking about.
Err, security is about preventing attacks -- not about having evidence that they've happened.