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Date: Wed, 19 Aug 2015 10:33:26 -0400
From: Alain Espinosa <>
Subject: Re: 7z's KDF is unsalted

-------- Original message --------
From: Solar Designer <> 
Date:08/18/2015 5:45 PM (GMT-05:00) 
Subject: Re: [john-dev] 7z's KDF is unsalted 

> >And doesn't the AES step prevent rainbow tables for 7-Zip (even if it
> >doesn't prevent the speedup you've now implemented)?
> I'm not quite sure. Does it? It's a later step, just like the 
> post-processing for WPA-PSK.

Yes, it prevents the use of rainbow tables. We can use precomputed tables,  similar to WPA-PSK, but can't use the TMTO.

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