Tagged Questions
2
votes
1answer
456 views
How long it will take to crack a RAR password?
I wonder how long it will take to crack 16 character alphanumeric WinRAR password for a mini supercomputer. As far as I know graphic cards are preferred over CPUs to crack passwords nowadays. If we ...
2
votes
2answers
140 views
Slow down symetric encryption
I'm developing a program in Java. In one step data should be encrypted and exported in a file.
As of now we are encrypting in AES-256
I want to slow down a possible brute force attack as much as ...
-1
votes
1answer
41 views
Automated post request [closed]
I'd like to write a script to test my site by means of automated post request to login password inputs. Can I use Brutus software ? Where can I find some script's source code from which to inspire ?
6
votes
3answers
208 views
How much added security do I really get with a longer key size?
Imagine I have a cipher which supports keys of 128, 192 or 256 bits. Suppose that there are no vulnerabilities in the cipher regardless of key length. I'm going to use it to encrypt something, and ...
3
votes
2answers
5k views
Remove Password Protection from XLS Document
Similar to what is listed here, http://datapigtechnologies.com/blog/index.php/hack-into-a-protected-excel-2007-or-2010-workbook/, is there a way to remove the password from an XLS (Excel 2003) ...
1
vote
2answers
228 views
Hash, encryption of file… key? Need help [closed]
So my previous question was with some help on pcap files as I am doing a security course and we have a challenge to figure out what was going on in our network. Now one of the files I retrieved is an ...
1
vote
2answers
642 views
how long does it take to brute force varying encryption standards?
Let's say I want to encrypt information in a database. What would be the best encryption algorithm to use and why. I was thinking AES, since it's widely used as a government standard, but if the ...
1
vote
1answer
621 views
Brute-force a passphrase, generated by `pwgen 16 -s`, of a GPG CAST5 archive
A sad story: One of our hard drives failed. While it was failing, we managed to take a quick backup. As it is our standard practice, we encrypted the backup using GPG (by however method Duplicity uses ...
2
votes
2answers
281 views
Can key files be brute-forced like passwords?
Let's say you use a program like Truecrypt or Keepass which allows you to have a password + key file. I understand that passwords can be brute-forced/dictionary-attacked but is the same true for key ...
4
votes
3answers
903 views
What are the odds of brute-forcing an archive with 256-bit encryption?
I have a file (a stand-alone archive). I lost the password to it, but it has been encrypted using 256-bit encryption. The password is some 20-odd characters long (including non-alphanumeric ...
7
votes
3answers
406 views
It is possible that brute force attempts are successful before the worst case, correct?
When I read about a password being secure and stating that it would take X amount of week, years, etc. isn't that referring to the worst case?
What happens if the brute force method is successul in ...
16
votes
2answers
12k views
How to estimate the time needed to crack RSA encryption?
How to estimate the time needed to crack RSA encryption? I mean the time needed to crack Rsa encryption with key length of 1024, 2048, 3072, 4096, 5120, 6144, 5120, 7168, 8192, 9216, 10240, 11264, ...
3
votes
2answers
304 views
How to optimize compressed file cracking?
I'm currently doing research on cracking encrypted, compressed files (specifically: uif, zip, 7z, dmg). Looking at all the utilities out there, it seems the time it takes to crack something is ...
