Date: Wed, 14 Nov 2012 08:35:50 +0400 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: Trying to understand output of john -status On Mon, Nov 12, 2012 at 07:04:59PM +0000, Andrew wrote: > We are a small organization where two people left unhapply. There are a number > of files that are encryped eg VI and others where we think they used the same > passwords as their login. We would like to access those files. You could speed the attack up by focusing it on just those people's passwords - not trying to crack the rest as well. > Here is the loaded option.. > Loaded 18 password hashes with 18 different salts (FreeBSD MD5 [128/128 SSE2 > intrinsics 4x]) Since each of your hashes has a unique salt, excluding some of the hashes from attack will speed up the attack on the remaining hashes. The c/s rate won't increase, but the candidate passwords per second rate (not displayed) will. You may also speed things up a little bit by downloading the latest JtR -jumbo version in form of source tarball and compiling it with "make linux-x86-sse2i" (with the trailing "i"). > I believe the version is 1.7.9 > > At least the CHANGES file says this ... > The following changes have been made between John 1.7.8 and 1.7.9: > (I cannot see an option in john like john -version) The version number is printed when you run "john" with no arguments. You may need to scroll up to see it, though, as the usage output is rather long lately. > You mentioned the "Make Target". This is unknown to me. It is simply on the > linux that we installed on this computer as part of the linux. One of the > other fellows mentioned backtrack 5 so we dl'ed it and installed it and there > it was. Im not a programer so the only making I do is the odd time when I have > to install some softwere that needs compiling, and I follow the instructions > slavishly. Not often. Understood. Well, I guess BackTrack used a slightly sub-optimal make target for this JtR build. That said, it is also true that your computer is just slow by modern standards - e.g., cracking these hashes on an AMD FX-8120 CPU (under $200) running a 64-bit OS will be about 40 times faster (over 200k c/s), and a GPU will be faster yet. Alexander
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