this post was submitted on 13 Jul 2023
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I password protected a ZIP file a long time ago and can't remember the password. Is there a way I can get it back, or remove the password?

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[–] slazer2au@lemmy.world 22 points 1 year ago (1 children)

Depends on what software you used to zip it and which format.. zip,rar,7zip,tar.gz

you could use zip2john or John the ripper to brute force the password but that takes time

[–] TheGiantKorean@lemmy.world 3 points 1 year ago (1 children)

I actually did try JtR but it was taking forever. Original format is .zip.

[–] Rooki@lemmy.world 5 points 1 year ago (1 children)

I would take that as your biggest hope. Do you know the length of the password?

[–] TheGiantKorean@lemmy.world 1 points 1 year ago (1 children)

No, but I'm guessing it was fairly long.

[–] Atemu@lemmy.ml 2 points 1 year ago (1 children)

How much is "fairly long"?

What do you know about the password?

[–] TheGiantKorean@lemmy.world 1 points 1 year ago (1 children)

Like 15 characters or so is usually how long my PWs are.

[–] Atemu@lemmy.ml 3 points 1 year ago

If that's all random characters, you're not going to crack that by brute force in your lifetime.

[–] Strayce@lemmy.sdf.org 18 points 1 year ago* (last edited 1 year ago)

Depends. Some older versions of zip encryption are vulnerable to a known plaintext attack. That is, if you know part of the content of one of the original files, you can recover the password. This utility might be helpful. bkcrack

[–] mysoulishome@lemmy.world 4 points 1 year ago (1 children)
[–] TheGiantKorean@lemmy.world 1 points 1 year ago (1 children)
[–] mysoulishome@lemmy.world 3 points 1 year ago

The difference between Lemmy and Reddit is I believe you

[–] Eavolution@kbin.social 3 points 1 year ago

You could try zip2john and John the Ripper or Hashcat (Hashcat may be quicker)