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# Combination Lock with 281 Trillion Possible Combinations With a Trap!

29 replies to this topic

### #21

hutchy2011

Posted 27 November 2012 - 01:22 PM

blackknight1337, on 27 November 2012 - 05:48 AM, said:

Nope, give someone enough time and it's straightforward to crack it. It's only near impossible if any single player can only have a single shot at it. So yeah, given enough time, anyone can crack it pretty easily.

And like I said, it's only finite if the person attempting to crack it knows the combination length. Then it turns into n^n where n is the number of buttons. If the combination remains an unknown, which it would, then it becomes n^x where n is the number of buttons and x is the guessed combination length. Which, because the x is an unknown, gives an infinite amount of possibilities. So yeah, without prior knowledge (combination length or total possible combinations), the lock is infinite.

281000000000000/60/60/24/52/100 = 625445

Incase you don't know that means if you try a different combination every 1 second it will take you 625,445 CENTURIES! to try every combination.

Lets say you get lucky and do it within the first quarter it will still take you approx. 150,000 Centuries to crack it.

Average of lets say 100, you would need 150,000 people try every single second of the live to have a 1/4 chance of cracking it.

Still possible?? Still easy??

I dont think so

Also because of the redstone limits in minecarft x will be less than, lets say, 1,000,000 therefore not infinite but still near impossible to crack

### #22

blackknight1337
• Minecraft: blackknight1337

Posted 27 November 2012 - 03:07 PM

hutchy2011, on 27 November 2012 - 01:22 PM, said:

-Snip-
You know I was mostly talking generally right? Obviously adding excessive amounts of inputs will throw that out the window. That method works for literally everything.

And I'll say it again, button based locks are only finite if the player already knows the combination length. Without that then they have no way to restrict the amount of combinations thus making it infinite. Here's an example, you walk into a room, on the wall in front of you there is a 3x3 panel of buttons. From this you get the amount of combinations as 9^x which means that, to you, there is an infinite range of combinations. You can guess the combination length by roughly estimating the size of it, but what if that estimate is way off? or if the lock is hidden in a mountain with block protection (like it would in this case)? Then your back to square one, with the combinations being infinite. So yeah, without having something to narrow the combination length down then you have an infinite amount of combinations to go through.
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### #23

hutchy2011

Posted 27 November 2012 - 05:12 PM

blackknight1337, on 27 November 2012 - 03:07 PM, said:

You know I was mostly talking generally right? Obviously adding excessive amounts of inputs will throw that out the window. That method works for literally everything.

And I'll say it again, button based locks are only finite if the player already knows the combination length. Without that then they have no way to restrict the amount of combinations thus making it infinite. Here's an example, you walk into a room, on the wall in front of you there is a 3x3 panel of buttons. From this you get the amount of combinations as 9^x which means that, to you, there is an infinite range of combinations. You can guess the combination length by roughly estimating the size of it, but what if that estimate is way off? or if the lock is hidden in a mountain with block protection (like it would in this case)? Then your back to square one, with the combinations being infinite. So yeah, without having something to narrow the combination length down then you have an infinite amount of combinations to go through.

ITS NOT INFINITE. because of how redstone works in minecraft there will be a max amount it can be. therefore i will try every combination of every combination length. up to the combination length 9^99999999.

will you agree you cant have a combination longer than 9^99999999 in minecraft??? if so you are it proofs its finite

cba working out how many possible combinations that is but still not infitie

### #24

Berwout

Nether Resident

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• Location: The Netherlands
• Minecraft: AngelsDustz

Posted 27 November 2012 - 05:44 PM

Pff only 291.474.976.710.656 possible combinations.

1.000.000 = Million
1.000.000.000 = Billion
1.000.000.000.000 = Trillion

So there are 2,91474976710656 x 10^14 possibilities
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### #25

hutchy2011

Posted 05 February 2013 - 05:15 PM

Berwout, on 27 November 2012 - 05:44 PM, said:

Pff only 291.474.976.710.656 possible combinations.

1.000.000 = Million
1.000.000.000 = Billion
1.000.000.000.000 = Trillion

So there are 2,91474976710656 x 10^14 possibilities

think you can crack it?

### #26

Czar_Yoshi

Posted 06 February 2013 - 06:38 AM

jatie1, on 20 November 2012 - 10:20 AM, said:

How much cobble did you need for those levers? Problemo?

48 blocks. If that impresses you, I'd advise you go mining some time.

Hutchy, if you're this concerned about security make a door that only opens when you give diamonds (for a very short period of time) followed by a brutal platforming gauntlet that punishes failure by forcing you to /home to escape (and pay more diamonds to try again). You could always put this at the end for good measure. Then you could get something from your security system beyond peace of mind.

### #27

Liamfromoz
• Location: Australia
• Minecraft: liamfromoz
• Xbox:Liam from oz

Posted 06 February 2013 - 07:02 AM

Looks awesome, would be too hard for me to make lol.

### #28

Ferdi265
• Minecraft: ferdi265

Posted 06 February 2013 - 08:50 PM

I once made a 3*3 button panel with a changable up to 10 Button sequence. Was a bit big, but it worked pretty well. Silent reset, so you couldn't really see from the outside when it reset. Nearly noone could crack that.

Btw cubehamster made a pretty small 3*3 + 1 button panel with 4 button sequence and wrong code detection

### #29

snipe7r

Zombie Killer

• Members
• 161 posts

Posted 06 February 2013 - 09:47 PM

hutchy2011, on 21 November 2012 - 05:11 PM, said:

I built this for my base on the pvp server I play on. I have block protection so people cant break any blocks however I must have a legitimate entrance to my base therefore I have this stopping people getting in. I simply use /home to get through it
I'm more evil and I put a fake combo lock on the door. No matter which lever sequence you pull you get shot on the tenth pull.