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[arstechnica] 25-GPU cluster cracks every standard Windows password in <6 hours - Page 10

post #91 of 144
Quote:
Originally Posted by Xinoxide View Post


48 THOUSAND YEARS.

 

That's how long it'd take a normal desktop computer without GPU acceleration or anything special. Then look how much computers have changed in the past decade. In 10 years it might only take a few days to crack it. Well when that happens you can just add another character to it. biggrin.gif

Just curious, why focus on cracking the password, isn't it possible to bypass it all together? When you use a password it hashes what you type in and sees if that hash checks the password hash, if it does it allows you access. Can someone just bypass the password check all together? I'm not sure if that makes sense, if it doesn't let me know and I'll try to rephrase it.

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post #92 of 144
Quote:
Originally Posted by Kaldari View Post

This is for only 8-digit passwords. What the article doesn't explain is how each digit past 8 dramatically increases the number of possibilities, and thus dramatically increases crack time.

There are 94 possible characters if you include upper case, lower case, numerals, and special characters. Each character adds a power. So, take the number of possible combinations at 8-digits, and then multiply it by 94. 10 characters? Take the number you just got for 9 characters, and multiply that by 94 again. This process can go on and on.

5.5 hours to crack 8 characters they say? Well we're up to almost 21 and a half days just from going to 9 characters. I use 12 characters for absolutely everything.

Even with this hyper-fast, password-cracker GPU cluster, it would take them up to over 49,000 YEARS for a 12-character password. That's right.. add 4 characters and you go from 5.5 hours to 49,000 years.

Use a different, 12-character password for everything and research ways to not compromise yourself on potentially insecure computers, and you have absolutely nothing to worry about (for the most part).

It wouldn't necessarily take them 49,000 years to crack your password. What if yours was randomly generated first on their list? BAM, 1 second crack.

These are MAX times.
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post #93 of 144
Quote:
Originally Posted by Ecstacy View Post

That's how long it'd take a normal desktop computer without GPU acceleration or anything special. Then look how much computers have changed in the past decade. In 10 years it might only take a few days to crack it. Well when that happens you can just add another character to it. biggrin.gif


Just curious, why focus on cracking the password, isn't it possible to bypass it all together? When you use a password it hashes what you type in and sees if that hash checks the password hash, if it does it allows you access. Can someone just bypass the password check all together? I'm not sure if that makes sense, if it doesn't let me know and I'll try to rephrase it.

I know you quoted another post, but the 49,000-year mark in my example is with the 25-GPU cluster listed in the OP. Make a completely random, 12-digit password, and you're virtually uncrackable with anything out there right now.

If figuring out the password unlocked the mysteries of life or a mountain of gold, I'm sure crowd-computing could do it, but you're safe from anything else.
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post #94 of 144
Never mind the passwords, can it run BOINC projects ?

LOL

dunx

P.S. As stated wouldn't it be easier to "hack" the password verification code thus allowing access to the system ?
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post #95 of 144
very interesting thread
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post #96 of 144
Quote:
Originally Posted by 2002dunx View Post

Never mind the passwords, can it run BOINC projects ?
LOL
dunx
P.S. As stated wouldn't it be easier to "hack" the password verification code thus allowing access to the system ?


If there's a OpenCL version of BOINC.... yes.

What does that mean? Do you mean flaws in the NTLM implementation.
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post #97 of 144
step 1. use ctrl backspace in password
step 3. Profit!
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post #98 of 144
Ya but can it run Crysis.
post #99 of 144
Thread Starter 
Quote:
Originally Posted by BinaryDemon View Post

Wow, Just imagine how fast the cluster would be if they used GTX690's...
Waits for the GTX6xx's are weak at GPGPU comments.. smile.gif

Much much slower.
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post #100 of 144
With all the talk of the lockout time =5, if someone or a group was dedicated, they will find a way in, and just disable that from GP.
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