string combination

Niklas L

Unique compared to what? Are you talking about a function that will return a new string every time it's called? Or do you have a list of strings you don't want to duplicate?

john5632

yes

barneyman

UuidCreate() will create you a unique GUID which you can turn into a 36 character string http://msdn.microsoft.com/en-us/library/aa379205(v=VS.85).aspx[^]

Niklas L

The fastest way would be to enumerate the possible combinations of the desired alphabet on the fly, and for each call advance a step, and remember the last unique string. For short strings, you could benefit from having them pre-generated.

varunpandeyengg

The fastest way what I think will be using TimeStamp. 1) Get the current Time (in Milliseconds ) 2) Append it to string or if comfortable, use the same as a string... UuidCreate() is a good option but fastest will be timestamp + YourSignature -- CHEERS!!!

john5632

Thanks for your reply. But I want the all possible comabination of given string of specific length. I am developing a password recovery utiluty so I need to pass all string combination to match the desired string. Can you suggest me the fastest one to do so.

CPallini

You mean the fastest in 'code development time', I guess.

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

john5632

Almost all utilty find the password string match within few seconds. I want to do the same. So I need to pass string to match. So suggest me fastest method to generate string. Please suggest something meaningful.

CPallini

That's not your original request (at least in the motivation). Why should we encourage your hacking intentions?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

Niklas L

Check my post about enumerating the strings. But before you get too enthusiastic, you should read about something that might get in your way: Salt[^].

varunpandeyengg

You are right... I think the intension is a bit shabby... ha ha ha ha. Caught!!! This guy needs to enumerate all possible string. Brute Force with Alpha Numerics takes a lot of time + Ethics please.

john5632

If you can not give answer dont laungh on others :)

Chris Losinger

the trick to doing it quickly is to not generate all possible strings. the trick is to generate likely strings first. "dictionary" is the magic word. if the dictionary fails, then you have to do it the hard way: aaaa aaab aaac aaad ... ZZZZ

image processing toolkits | batch image processing

varunpandeyengg

Hey John... Always try to be smart while seeking answers of indirect questions. :cool: You have been already answered :|. BTW In Advance Login system (used in most of the places where you see "User Name" and "Password" currently), the no. of guesses you can make is always limited. So Brute force really shouldn't be your approach. The Probability of you cracking the password is 1/((All the case sensitive alphabet + Numbers + Special Characters) ^ (length of the password - which is unknown). If you are still trying - Read this: - This guess will be +ve if you get the correct password in "almost The Best case" i.e. you must be able to guess it in 3 chances (approx). (Advice) Try something else... Best Super Computers if used will take days to crack one strong password by Brute Force. And yes, Always be ethical!!! PS: - The above message has no relevance to the initial question.