This block feels sturdy. But, as mentioned elsewhere, the sequence of keystrokes does not matter. Thus, the combination of '12345 'is equivalent to '54321' or '23451 ', etc.
It takes a combination of 5 digits, a combination of 6 digits, or a combination of 7 digits. Your best security is a combination of five digits, because there are 252 combinations of 5 digits. (10 choose 5, mathematically). There are 210 possible combinations of six digits and 120 possible combinations of 7 digits.
Assumingthat the attacker (who is trying to break) does not know how many points you have selected, this means that there are 582 possible combinations. If there are about five (5) seconds to do each test, and take a break of 15 seconds every minute, then an attacker could find the combination in about 65 minutes. (582 combinations * 5 / 2 / 45 seconds of work per minute => 65 minutes). It assumes that yours is the 'last, but a combination tested.
(By the way, my Discrete MathematicsThe class is paying off!)
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Features - GE Security 001406 AccessPoint KeySafe 3-Key Portable Push-Button Key Box, Black
Overviews - GE Security 001406 AccessPoint KeySafe 3-Key Portable Push-Button Key Box, Black
Portable Push Button Lock Box - Black Portable Push Button Lock Box Solid track record for unmatched quality and security. Interlocking faceplate prevents tampering and unauthorized access. Opens easily using a combination that you can choose and set/reset for yourself! Easily change the combination as often as you wish. Hangs effortlessly off of any door handle. Comes complete with easy to follow instructions. Features a rubber bumper to protect door finish. Just a few fascinating ways to use a store a key.... Uncle Dan is visiting, and he’s arriving on the red eye. Dan can let himself in and you can see him in the morning! Your keys fell out of your daypack, 4 miles up the trail. That’s 8 miles round trip! Your brother needs to borrow your car, and you don’t want to leave the keys in an obvious place, like under the seat! You simply don’t like to carry keys. Stop the key bulk and key rattling noise once and for all! Your elderly mother can’t get to the door, open up the Store A Key, and you’re there to help. Available Colors
Specifications - GE Security 001406 AccessPoint KeySafe 3-Key Portable Push-Button Key Box, Black
Ideal for realtors, construction contractors, vacation properties and rentals, this locking key box stores up to three keys for easy access on entry doorknobs, fences, and more. The KeySafe provides easy access for real estate buyers and sellers, service workers, and vacation property renters with an easy-to-use, pushbutton combination. The box lets you enter one of over 1,000 possible combinations. And, you can change the combination anytime for added security. The unit hangs easily on doorknobs, fences, railings, pipes or any prominent place where it'll be found quickly and can be reached without trouble. Just open the lid, lift the shackle and hang. Constructed of sturdy metal with a protective rubber shell, the lockbox is guaranteed never to rust. --Brian D. Olson
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