Cheat Engine Forum Index Cheat Engine
The Official Site of Cheat Engine
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 


Question about rar password cracking. (Not a request)

 
Post new topic   Reply to topic    Cheat Engine Forum Index -> General programming -> Crackmes
View previous topic :: View next topic  
Author Message
407
Master Cheater
Reputation: 0

Joined: 25 Oct 2007
Posts: 359

PostPosted: Sat Jan 01, 2011 1:30 am    Post subject: Question about rar password cracking. (Not a request) Reply with quote

I'm working on something that requires me to zip up a file, and change it to a .pack file. I'm thinking about attempting to zip it up with a password so that no one can un-zip it without my permission, but the problem is, I'm not sure how safe it is to zip something up with a password.

How hard, or what knowledge would someone need to know to access my zipped files?


Basically, I just don't want someone to run a program and be able to unrar my files..
Back to top
View user's profile Send private message
atom0s
Moderator
Reputation: 136

Joined: 25 Jan 2006
Posts: 7216
Location: 127.0.0.1

PostPosted: Sat Jan 01, 2011 2:27 am    Post subject: Reply with quote

Brute forcing, rainbow tables, and a little patience will crack your password.
_________________
- Retired.
Back to top
View user's profile Send private message Visit poster's website
mystique
How do I cheat?
Reputation: 0

Joined: 22 Apr 2011
Posts: 5

PostPosted: Tue Apr 26, 2011 12:18 pm    Post subject: Reply with quote

Are you talking about RAR or ZIP when you say "zip it up"? Razz

The 7z format has very strong encryption system. It uses AES-256 cipher and SHA-256 hash for the key generation. The hash is executed 2^19 times, making all brute force attacks and rainbow tables useless. No one will crack your files if the password is not something like "1234".

I don't know that much about RAR encryption but I think rar v. 2 and v. 3 use similar hashing techniques and v. 3 also uses AES so it should be more than enough safe.

Modern versions of ZIP support AES but the old encryption (ZipCrypto) is not very safe. It's vulnerable to known-plaintext attack and if the archive is created using certain versions of WinZip, the encryption key can be found easily using just brute force.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Cheat Engine Forum Index -> General programming -> Crackmes All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group

CE Wiki   IRC (#CEF)   Twitter
Third party websites