All Questions
12 questions
0
votes
1
answer
184
views
Getting encrypted password
I have seen many hackers bruteforce password for gaining access to social media.
In famous Mr Robot series it is shown that Elliot(main character) brute forces people and the password is displayed on ...
- 51
7
votes
1
answer
2k
views
Why brute-force the password instead of the key directly?
This answer on another question on security stackexchange by a very reputed user explains why he prefers GnuPG over OpenSSL for file encryption. From what I understand, it can be summarized as this:
...
- 225
2
votes
4
answers
3k
views
How to figure about the total amount of password combinations possibles that have salt values?
I'm reading this book about Computer Security to better prepare me for my role, however, this question is just not clicking to me. I've figured out half of it, but cannot figure out this last part. If ...
- 21
4
votes
1
answer
1k
views
Writing your own John the Ripper module
I have a script in C, which is able to determine the password of certain data. It uses HMAC and RC4 algorithms to encrypt the given password and then compares that later to the given data. If they ...
- 782
2
votes
1
answer
283
views
Given a hash, salt, charset and password length, how do you get the password without brute-forcing it?
I got that question on an exercise and I'm not sure what to answer.
Without conventional brute-forcing and without a rainbow table, how could I find out the password?
An improved brute-force ...
user15194
3
votes
1
answer
20k
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 ...
- 415
6
votes
3
answers
662
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 I'...
- 196
3
votes
2
answers
41k
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) ...
- 1,089
1
vote
2
answers
1k
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 ...
- 113
4
votes
2
answers
1k
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 ...
- 2,978
6
votes
3
answers
6k
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 ...
- 2,929
7
votes
3
answers
2k
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 ...
- 171