How can I recover a password protecting a .zip file?

Amit sinha October 26, 2011

I have forgetten my zip file password which is almost 21 characters long and consists of lower case and upper case letters with numbers and special characters. Guessing it is out of the question. Is there any way to recover my files?

  1. Mikewatson
    November 2, 2011 at 11:07 am

    I forgot my password with facebook

    • Jay
      November 2, 2011 at 11:15 am

      Recover the password from here,
      enter your email id that you used for facebook and press search.
      send password reset link to your email inbox.
      and reset the password.

  2. Gerry
    October 28, 2011 at 4:03 am

    An easy solution to solve it; Firstly you need this :

    1) Install WinRAR latest version, free or paid doesn't matter.
    2) On your computer, find your zip / rar file that one you lost the password.
    3) Highlight the file, right click on it. Click on 'Delete' or press 'Delete' button on your keyboard.4) Then click 'OK' if it asking for permanently delete.
    5) Problem solved. 

    • Jeff Fabish
      October 28, 2011 at 4:34 am

      So where does needing WinRar come in? 

    • Hamad
      October 28, 2011 at 6:19 am

      Does that get him his files back?

  3. Shawn
    October 28, 2011 at 3:40 am

    Bruteforce using Amazon EC2 Services it will cost you a little bit but it can crack just about anything in an hour

  4. Jay
    October 27, 2011 at 1:52 am
    • Jeff Fabish
      October 27, 2011 at 2:02 am

      "Appnimi ZIP Password Unlocker allows to search for the password of the protected ZIP file using Brute Force algorithm" - Appnimi

      It would take About 65 trillion years to bruteforce even a dictionary phrase, whereby the bruteforcer contained all the keys mentioned in the password. If it was a completely arbituary password as Amit mentioned, there is about 0.00000000001% chance of it being cracked by a traditional dictionary based bruteforce attack.

      • Jay
        October 27, 2011 at 2:08 am

        That's why I added to look for the data, or recover the deleted data using data recovery program instead of trying to remove the password.
        The easiest option(if it works)

  5. Jeff Fabish
    October 27, 2011 at 1:38 am

    Bruteforcing too, is out of the question. What application did you use to pack it? You could try searching for a vulnerability in the packing scheme or encryption implementation. You can search for these vulnerabilities at exploit-db and security focus, which if you're using older compression software the vulnerability is likely still available. 

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