create 13letter combination

[foxidrive]

Here ya go: http://www.google.com.au/search?hl=en&q=gpu+password&btnG=Google+Search

[Geek-9pm]

WOW! That is really scary.
I will have  to change all my passwords. 

[tendude]

after 3 days...i did it...

[foxidrive]

This doesn't give a complete list does it?  zzaaaaaaaaaaaa is missing for example.

My brain hurts on this topic of all permutations...

Visual Basic Script

cscript //nologo scriptname.vbs > letter.txt

dim a(13)
startcode=97
for j = 1 to 13
    a(j) = startcode
next
for index=13 to 1 step -1
    thiscode=startcode
    do until thiscode > asc("z")
        a(index)=thiscode
        Mystring = ""
        for j = 1 to 13
            Mystring = mystring & chr(a(j))
        next
        wscript.echo Mystring
        thiscode=thiscode + 1
    loop
next

[Salmon Trout]

This doesn't give a complete list does it?  zzaaaaaaaaaaaa is missing for example.

My brain hurts on this topic of all permutations...

The OP asked for

i need a batch...which create combination 13 letter a-z

exp-

aaaaaaaaaaaaa
aaaaaaaaaaaab
aaaaaaaaaaaac
....
....
....
yzzzzzzzzzzzzzz
zzzzzzzzzzzzzzz

[Geek-9pm]

For what it is worth.
Password crackers seldom try all permutations of a 12 or 13 letter string. Instead they use lists of known popular passwords and some hash obtained by snooping around. Of course  snooping is unlawful.
From CNN: The 25 worst passwords of 2012

[foxidrive]

For what it is worth.
Password crackers seldom try all permutations of a 12 or 13 letter string. Instead they use lists of known popular passwords and some hash obtained by snooping around.

That's using a 'dictionary' list as opposed to brute-force password cracking, which uses all the permutations. 

I tried it once a long time ago on a ZIP file I had and after a few days I gave up.  That was a 486 era PC.

[Geek-9pm]

This thread will not die pending all permutation are tried.
Not true. Let's kill it now. 
[Begin a rant]
A 'cracker' may have either a few specific targets or a wide range of potential victims. That can make a difference. But the hardware makes a big, big, and more big difference. Three orders of magnitude. 

When specific targets, even just one, are /is the goal,  special methods are used.
The 'cracker will use a modified computer to 'snoop' the network connection.  This could mean a physical intrusion into the facility. So it is unlawful.

The modified PC will search for patterns in the encrypted stream. A database is made of instances whee the same pattern is  found. Later the patterns are used off-line to crack passwords. Even the entire text.  Using a very powerful modified PC the encryption is eventually cracked. Once that is done, the passwords used on that part of the LAN will be visible to the snooper.
No generation of sequences are needed, other than  what is done internally by the ***** *** ***** anti-encryption engine. The process is many. many times faster than 'brute force' use of an almost endless set of permutations that would take months. Using ����� ������***** *** ***** ��� anti-encryption hardware, a bunch of passwords can be found in a matter of days or hours.

Look at this headline

iOS Encryption Is So Good, Not Even the NSA Can Hack It - Gizmodo

Really?   - What about this:
http://www.geek.com/apple/apples-ios-4-hardware-encryption-has-been-cracked-1382719/
Or this:

http://www.schneier.com/blog/archives/2011/05/apples_ios_4_ha.html
May 27, 2011
Apple's iOS 4 Hardware Encryption Cracked
All I know is what's in these two blog posts from Elcomsoft. Note that they didn't break AES-256; they figured out how to extract the keys from the hardware (iPhones, iPads). The company "will be releasing the product implementing this functionality for the exclusive use of law enforcement, forensic and intelligence agencies."

The point is that when you crack the encryption, ALL passwords become your booty whenever a user has one of the popular encryption methods on his PC or mobile device. Scary. No need to guess. Just peek.   
[/End of rant]