[ophcrack] Password cracker 100 times faster with an SSD

begood · 03-10-2010, 07:38 PM

The security specialist Objectif Sécurité has optimised its rainbow tables – a common tool used to crack password hashes – to make use of SSDs. The result is, according to Objectif Sécurité's Philippe Oechslin, an acceleration by a factor of 100 when compared to their old 8GB Rainbow Tables for XP hashes. A web form takes the XP-hashes and cracks them for free with the new, ten times larger tables.

Oechslin has fitted an elderly Athlon 64 X2 4400+ with an SSD and the optimised tables. This system can, with only a 75% CPU utilisation, crack a 14 digit password with special characters, in an average of 5.3 seconds. Oechslin says that, worst case, it should be able to search arithmetically through 300 billion passwords per second, a speed that is a factor of 500 faster than an Elcomsoft cracker supported by a modern Tesla GPU from NVIDIA.

Calculations with rainbow tables achieve the acceleration by pre-computing the intermediate steps of all possible password hashes for a specific algorithm and then storing those results as a table. The more steps that are stored, the bigger the tables and the faster the cracking process. Once the tables no longer fit in memory, the less-used parts of the tables are saved on mass storage devices, previously this would have been a hard disk, which in turn leads to slower access times while searching them.

[Doar userii inregistrati pot vedea linkurile. ]

waingro · 03-10-2010, 09:27 PM

de un miliard de ori am zis ca mi fac si eu rainbow ul..si .. cand vad cat tre sa stau .. imi vine a phu..

begood · 03-10-2010, 09:32 PM

Quote:

Originally Posted by waingro

de un miliard de ori am zis ca mi fac si eu rainbow ul..si .. cand vad cat tre sa stau .. imi vine a phu..

nu are rost sa-ti faci inca.
acum lucrez la un gpu-rainbowtable generator, inca nu stiu cand il gat(e in alfa), dar va fi de ~30 ori mai rapid ca un cpu.

Pana gat tot, keep your pants on.
[Doar userii inregistrati pot vedea linkurile. ] [Doar userii inregistrati pot vedea linkurile. ] <- vezi paci pana una alta.

waingro · 03-11-2010, 05:59 AM

da stiu cum sa il fac.numa ca sunt un tampit si nu stau sa l fac pana la capat.

03-10-2010, 07:38 PM	#1 (permalink)
begood Moderator Cultul betivilor Join Date: Jun 2008 Posts: 2,634 Rep Power: 5	[ophcrack] Password cracker 100 times faster with an SSD hotel regim hotelier hotel yahoo domain The security specialist Objectif Sécurité has optimised its rainbow tables – a common tool used to crack password hashes – to make use of SSDs. The result is, according to Objectif Sécurité's Philippe Oechslin, an acceleration by a factor of 100 when compared to their old 8GB Rainbow Tables for XP hashes. A web form takes the XP-hashes and cracks them for free with the new, ten times larger tables. Oechslin has fitted an elderly Athlon 64 X2 4400+ with an SSD and the optimised tables. This system can, with only a 75% CPU utilisation, crack a 14 digit password with special characters, in an average of 5.3 seconds. Oechslin says that, worst case, it should be able to search arithmetically through 300 billion passwords per second, a speed that is a factor of 500 faster than an Elcomsoft cracker supported by a modern Tesla GPU from NVIDIA. Calculations with rainbow tables achieve the acceleration by pre-computing the intermediate steps of all possible password hashes for a specific algorithm and then storing those results as a table. The more steps that are stored, the bigger the tables and the faster the cracking process. Once the tables no longer fit in memory, the less-used parts of the tables are saved on mass storage devices, previously this would have been a hard disk, which in turn leads to slower access times while searching them. [Doar userii inregistrati pot vedea linkurile. ] __________________ “The problem of viruses is temporary and will be solved in two years.” – John McAfee, 1988 Blog.

Last edited by begood; 03-10-2010 at 07:44 PM.

03-10-2010, 09:27 PM	#2 (permalink)
waingro Registered user Bautor de palinca Join Date: Sep 2009 Posts: 110 Rep Power: 1	de un miliard de ori am zis ca mi fac si eu rainbow ul..si .. cand vad cat tre sa stau .. imi vine a phu.. __________________ Your lucky numbers for today: 4, 0, 4. Actually, we couldn't find the page you requested. Please check the URL. http://brainbench.com

03-11-2010, 05:59 AM	#4 (permalink)
waingro Registered user Bautor de palinca Join Date: Sep 2009 Posts: 110 Rep Power: 1	da stiu cum sa il fac.numa ca sunt un tampit si nu stau sa l fac pana la capat. __________________ Your lucky numbers for today: 4, 0, 4. Actually, we couldn't find the page you requested. Please check the URL. http://brainbench.com