Date: Sun, 5 Aug 2012 17:52:28 +0530 From: Dhiru Kholia <dhiru.kholia@...il.com> To: john-users@...ts.openwall.com Subject: Dhiru's writeup for CMIYC 2012 Hi, This was my second time participating in CMIYC contest and I had tons of fun. Hardware Used: 1. AMD X3 720 BE CPU 2. ATI 6970 GPU (mostly unused) 3. N260 Atom netbook (used for cracking DES) 4. Intel i3 @ 3.3GHz (used for cracking DES, mostly idle) Before the contest it was announced that there would be EncFS challenges. So, I spent a day making various versions of EncFS crackers (finally I produced a CPU as well as OpenCL patch for JtR). This code is now committed to magnum-jumbo. I don't remember the name of the guy from our team who cracked EncFS easy but awesome work! During, the contest we got a surprise (among many) in the form of SXC challenge files. So, I started coding a cracker for these files. Within 3 hours, I had a CPU as well as OpenCL patch ready for JtR. I started running the OpenCL SXC cracker on  which eventually cracked the easy SXC challenge using rockyou dictionary with rules. I also cracked PDF easy but it was done too late. Apart for this, I mainly focussed on cracking DES hashes. I used all.lst (with rules), Facebook Names (with rules), "-i:digits", hashkiller.com dictionaries etc. Challenges were fun but the limit of 6 was too low. We could crack more ;). IIRC we cracked the maximum number of challenges first (and overall). Awesome work by Simon? and JimF in cracking sunmd5 hashes. Eagerly waiting for future hash breaking contests! PS: Future Tasks: Add DMG, 7-Zip and PGP (WIP!) support to JtR. -- Cheers, Dhiru
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