smartest crunch

[benjsh]

Hi,
Can someone help what is the smartest crun

a
./crunch 8 8 -f charset.txt mixalpha-numeric-all-space

anyone have an idea how long time it will take.


is it smart to use alpha-numeric-space instead?
Since most routers are with capital letters and numbers?

[thorin]

Speed/time are depends on system specs.

"smartest" would seem to a qualitative measurement requiring further definition.

[benjsh]

yeah but I mean most wpa consit of capital ABC + characters correct?

[kidFromBigD]

yeah but I mean most wpa consit of capital ABC + characters correct?

No.

Fact is, a WPA passphrase can consist of anything you can type on your keyboard with few exceptions. If you're talking about the Sky routers(UK) that others have said come with an ALL-CAPS default passphrase, then maybe. For the rest of us, a WPA passphrase could be any combination of letters and numbers, punctuation, spacebar or whatever, minimum 8 characters up to 63 maximum.

So that's why WPA can be extremely secure, if the humans running the network actually care about security.

[KMDave]

Let me ask what do you need it for anyway?

[benjsh]

thanks for info.

I just realized how unsecure my own networks are :-)
If I have a 8 character password that only consist of lower case abc how many possibilities would there be to crack it?

Are there some charts of

8 characters with numbers and letter = how many possibilities
8 characters with numbers Capital letters and letters = how many possibilities

[compaq]

Are there some charts of

8 characters with numbers and letter = how many possibilities
8 characters with numbers Capital letters and letters = how many possibilities

numbers may 10 numbers 1 char to 4 chars 10*10*10*10
letters a-z - 26 A-Z - 26

all up 26+26+10 = 62
8 char password = 62*62*62*62*62*62*62*62 = 218340105584896 passwords
at 5000k/s = about 1388 years


only lowercase chars
26*26*26*26*26*26*26*26 = 208827064576 passwords
at 5000k/s = about 1.3 years

[thorin]

No tables needed, you can calculate easily yourself.

(^ = exponent or power of. Comma is thousands separator and period is decimal.)

Character Set ^ Password Length = # of Passwords

Lower case (26):
26^8 = 208,827,064,576 Passwords

Upper & lower case (52):
52^8 = 5.34597285 × 10^13 Passwords (Approx 53.5 trillion)

Upper, lower, and numeric(62):
62^8 = 2.18340106 × 10^14

Upper, lower, numeric, and special chars [ascii 32-47, 58-64, 91-96, 123-126] (95):
95^8 = 6.63420431 × 10^15 Passwords (Approx 6 quadrillion)

Assuming a key speed of 5,000key/sec.
60sec x 60min x 24hours x 365days x 5000passwords = 157,680,000,000passwords/year

208,827,064,576 passwords / 157,680,000,000passwords/year = ~1.3 Years

Keep in mind given new techniques 5,000passwords/sec is very low.

Interesting paper here:
http://www1.umn.edu/oit/security/OIT...1_REGION1.html