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[arstechnica] 25-GPU cluster cracks every standard Windows password in <6 hours - Page 7

post #61 of 144
my pass is over 200 character long
post #62 of 144
Quote:
Originally Posted by $ilent View Post

my pass is over 200 character long
What program allows a password that long? Truecrypt maxes out at 60 characters, which is my password length.
post #63 of 144
Quote:
Originally Posted by Art Vanelay View Post

What program allows a password that long? Truecrypt maxes out at 60 characters, which is my password length.



tongue.gif
post #64 of 144
Quote:
Originally Posted by farmdve View Post

Fail...that was stupid. Telling that it's a name repeated 7 times narrows down the search list to just a few names of pets.

He just told us that the pet's name is 6 characters long, so that makes it even easier.
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post #65 of 144
Quote:
Originally Posted by RipperLord View Post

He just told us that the pet's name is 6 characters long, so that makes it even easier.

Yes yes, so now we just have to go over any possible name that is 6 letters long... and then wonder if maybe he has a funny pets name or a sequel pet? His first dog was Frank... now, it's Frank2 ... the revised model biggrin.gif

I could use all my pets names. That would make for a long password... 4 dogs and 2 cats smile.gif A mix of 'normal' and human names for my pets wink.gif
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post #66 of 144
Quote:
Originally Posted by That Guy View Post

C0r3ll!anBl00d$TR!P3
How long would it take to find that password using this method?
about two seconds since you just gave it to us -.-
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post #67 of 144
Unsure about your current password?

http://howsecureismypassword.net/
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post #68 of 144
Quote:
Originally Posted by farmdve View Post

Quote:
Originally Posted by NoL View Post

My normal password is 42 letters long. Not joking. Most sites don't let me use it though. Easy to remember, just a pets name repeated 7 times!
Fail...that was stupid. Telling that it's a name repeated 7 times narrows down the search list to just a few names of pets.

That is immaterial, as the cracker is not going to know that beforehand. The entire concept is brute force cracking a password hash. The larger the password, the longer it will take, as you need to account for all possible other passwords when attempting your crack. It may seem like an easy password to guess, but for computers, it is extremely hard.
post #69 of 144
Quote:
Originally Posted by Blameless View Post

I think just moving to 13+ characters will make most intelligently chosen passwords largely uncrackable with foreseeable technologies.
The issue with passwords (and any security) is ease of use vs strength.

In the end, cracking will overwhelm the current password system so a better way has to be devised.


Quote:
Originally Posted by Bloitz View Post

A smarter thing to do would be: 42 / 7 = 6 = the # of characters of the name. So you would only need to crack 6 characters. And I presume he would only use letters and no numbers or other characters in his pet's name (pretty obvious) then you'll get his password pretty fast. Probably faster than running through a list of pet names that might not even contain the name.
I don't know anything about cracking passwords, this is just what I know about brute-forcing something. If this is completely wrong, please feel free to correct me
Passwords are hashed so it doesn't work like that. It's a one-way process so there's no way to know what the original name repeated 7 times is until you figure out the entire password.

SHA-1:
Rover = ac54ed2d6c6c938bb66c63c5d0282e9332eed72c
RoverRoverRoverRoverRoverRoverRover = 4353144ace9e36d0a41a5d3cc96972a4b3acf0a4

If you can figure out a way to prove these two hashes are related..... you will probably win some awards (and get hired by the NSA).

Quote:
Originally Posted by Darkpriest667 View Post

In the future passkeys won't be text at all. Most likely it will be biometric and linked to specific users biometrics. Certain 3 letter agencies already do this with some success. It starts with fingerprints (fairly easy to crack but compared to a password a nightmare), it moves to retina, and eventually it does DNA with the final iteration being active DNA. Good luck trying to brute force that kind of stuff. It takes supercomputers beyond what even the best hackers have years to read a DNA strand.
Admittedly as computer power gets better and technology gets smaller and cheaper it will be easier to crack.
Biometric is not very good....
1) It requires a tolerance since we changed due to temperature, mood, stress levels, etc. Even DNA changes over time.
2) Once cracked, it's not replacable.
3) Biometric still converts the sensor data into digital form which can be attacked.

What you are really talking about is multi-step authentication.
Edited by DuckieHo - 12/10/12 at 7:51am
Once again...
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Once again...
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post #70 of 144
Quote:
Originally Posted by DuckieHo View Post

The issue with passwords (and any security) is ease of use vs strength.
In the end, cracking will overwhelm the current password system so a better way has to be devised.
Passwords are hashed so it doesn't work like that. It's a one-way process so there's no way to know what the original name repeated 7 times is until you figure out the entire password.
SHA-1:
Rover = ac54ed2d6c6c938bb66c63c5d0282e9332eed72c
RoverRoverRoverRoverRoverRoverRover = 4353144ace9e36d0a41a5d3cc96972a4b3acf0a4
If you can figure out a way to prove these two hashes are related..... you will probably win some awards (and get hired by the NSA).
Biometric is not very good....
1) It requires a tolerance since we changed due to temperature, mood, stress levels, etc. Even DNA changes over time.
2) Once cracked, it's not replacable.
3) Biometric still converts the sensor data into digital form which can be attacked.
What you are really talking about is multi-step authentication.

DNA only changes due to exposure to toxins etc. So I guess it does change over time but not in an ideal circumstance it doesn't. Of course we don't live in a perfect world so mutations do occur.
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