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Is it possible for someone to unlock your front door get into your house and then lock the door again without being supplied with a key?

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1 Answer

Yes, locks can be picked, or bump keys can be used. There's no difference in using these tools to unlock vs re-lock a lock.

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So someone can break into your home without there being any evidence of a break-in? –  Debbie Dec 6 '13 at 21:26
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Anything's possible. –  BMitch Dec 6 '13 at 21:27
    
How can I secure my front door then? The lock I have is high security, is quotes that it cannot be picked, bumped or drilled. Is there a lock that definitely cannot be unlocked and re locked without the key? –  Debbie Dec 6 '13 at 21:35
    
Alarm system? Though they can be compromised. Security guard? Though they can be bribed. There are no absolutes in security, only degrees in difficulty. Just as you don't have to be able to outrun a bear (only outrun the other person the bear is chasing) you don't need perfect security, just better than your neighbors. And you can make your front door more difficult to access than a bank vault, but that won't do any good if the back door or a side window can be easily opened. –  BMitch Dec 6 '13 at 21:42
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It's all about time involved, when meeting an "unpickable lock", brick through a window is very fast. What is your defense in depth? How do you prevent alternate route intrusion? –  Fiasco Labs Dec 6 '13 at 21:42
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