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Date: Fri, 3 Sep 2021 11:42:33 +0000
From: Cameron Palmer <>
To: "" <>
Subject: Pkzip Hash

I am looking at a file that contains a hash produced by zip2john


Is this an older hash type? $pkzip$ 

The zip contains both a zImage and jffs2.img file. I assume the zImage is for Renesas SuperH processors.

I’ve tried a couple of known plain text attacks against what I thought the first 12 bytes of the jffs2.img might be, but any advice as to what I might try in terms of brute forcing?

Thank you,


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