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(WTOP)   Is your ATM machine PIN number one of these 10 combinations? Yeah, you're gonna get robbed   (wtop.com) divider line 23
    More: Obvious, PIN number, atm machine, random numbers  
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26352 clicks; posted to Main » on 31 Jul 2013 at 9:09 AM (38 weeks ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



Voting Results (Funniest)
View Voting Results: Smartest and Funniest

2013-07-31 08:28:01 AM
4 votes:
Those are the combinations on my various pieces of luggage.
2013-07-31 10:06:19 AM
3 votes:
img51.imageshack.us
2013-07-31 09:28:43 AM
3 votes:
If you have absolutely no knowledge, the best way to pick a PIN is to simply roll 4d10, picking beforehand which die will correspond to which number. The best way to attack that would be to systematically try every combination at once, but in a random order (which is, over time, the way most likely to require the smallest number of rolls). But banks know this, and can detect it, so I clearly cannot choose the wine in front of you.

But most people don't carry 4d10, or even 1d10. So they don't pick randomly (they might think they're picking randomly, but study after study has shown that the human brain really sucks at picking random numbers). Hackers know this, and so they look for popular PINs and, when those run out, they look for information about the person -birthdays and anniversaries, for example- and try them. It doesn't work all the time, but you'll defeat the cracking checks much more often than you would with the random-draw method, so I clearly cannot choose the wine in front of me.

But we also know this works, and so since hackers aren't using a truly-random approach, we don't have to either. We can narrow the number of PINs we use, retain almost all of the strength of randomness, while adding strength by specifically countering these attacks. Just make a list of the 10 or so most common PINs, then add your "personal PINs" (important birthdays and anniversaries, and also these dates spelled backwards). You'll probably have a list of 30-odd PINs by the time you're done with this. Then roll your 4d10, and in the unlikely event that a number on your list comes up, just re-roll. You're not going to exclude enough possible pins to reduce your PIN's entropy significantly -for a four digit PIN, you'd have to exclude some 500 PINs to reduce its entropy by even one bit- but you'll ensure that the "smart" crackers will have to go through at least as many attempts as your list is long before having any chance of finding your PIN, and the crack-detector will catch them before that. So I clearly cannot choose the wine in front of you.

But, of course, if this catches on, then the most common PINs will change. New lists will have to be drawn up: your important dates might not, but other popular PINs will. So if your PIN falls on the new list -not terribly likely, but it could happen- you'll have to change it. This is a pain, so I clearly cannot choose the wine in front of me.
2013-07-31 08:29:34 AM
3 votes:
Well, all that's pretty much handled.
2013-07-31 08:20:47 AM
3 votes:
BLAAARGGGH!  The N stands for number!  blargblargblargblargblargblarg
2013-07-31 11:37:27 AM
2 votes:

Agnes Gonxha's Confidant: pornstar birthdates


I used the birth year of my favorite porn star: 1999.
2013-07-31 09:16:22 AM
2 votes:

PizzaJedi81: All right...my code is...

1

2

3

4

5


senses working overtime!
2013-07-31 09:14:58 AM
2 votes:
Great, 1337 is not on there!

I'm completely safe.
2013-07-31 08:44:45 AM
2 votes:
"6969"

F*cking Millennials. GET OUT OF MY BANK
2013-07-31 08:20:09 AM
2 votes:
BLAAARGGGH!  The M stands for machine!  blargblargblargblargblargblarg
2013-07-31 11:46:48 AM
1 votes:

Great Janitor: Agnes Gonxha's Confidant: pornstar birthdates

I used the birth year of my favorite porn star: 1999.



cdnassets.ordienetworks.com

1.bp.blogspot.com
2013-07-31 11:17:18 AM
1 votes:
ATM machine
ATM machine

ATM machine

ATM machine
2013-07-31 10:55:54 AM
1 votes:

nekom: Mine is the atomic number of a particular element, followed by the last 2 digits of my old BBS phone number.


Unfortunately, the result is 1234.
2013-07-31 09:27:52 AM
1 votes:
My ATM PIN used to be the first four digits of the product of the first six prime numbers in Pi divided by Planck's constant, but thieves guessed that one too easily and I lost everything.  Now my PIN just spells the word "dick."
d23 [TotalFark]
2013-07-31 09:26:46 AM
1 votes:

Monkeyfark Ridiculous: I can see why most of those are on the lazy list, but why is 1004 so popular?


Lots of C.W.Mccall fans still out there...

'Cross the USA!
2013-07-31 09:26:25 AM
1 votes:
I thought fark filtered out PINs, like it does with SSNs...

▋ ▋ ▋ - ▋ ▋  ▋- ▋ ▋ ▋ ▋
2013-07-31 09:20:27 AM
1 votes:
i1.ytimg.com

BOSCO
2013-07-31 09:17:05 AM
1 votes:
I have examined the list, and I am relieved by the absence of "8209".
2013-07-31 09:16:33 AM
1 votes:
Mine is
1
2
5
no 3 sir

1253
2013-07-31 09:13:56 AM
1 votes:
I've got all those combinations on my luggage.

Also, has the Fark Department of Redundancy Department chimed in that the M in ATM stands for machine, so the redundant headline is redundant?
2013-07-31 09:11:00 AM
1 votes:
All right...my code is...

1

2

3

4

5
2013-07-31 09:10:17 AM
1 votes:

nekom: Mine is the atomic number of a particular element, followed by the last 2 digits of my old BBS phone number.


Okay, that's old-school nerdy right there
2013-07-31 08:19:34 AM
1 votes:
BLAAARGGGH!  They're permutations!  blargblargblargblargblargblarg
 
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