Search found 136 matches

by Sc00bz
Thu Dec 17, 2009 6:51 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: Maths behind MD5
Replies: 12
Views: 10258

Re: Maths behind MD5

4 is not prime and 20 is not a valid modulus as it has more than 3 numbers (including 1) that divide it.

The only numbers that divide p are p and 1.
The only numbers that divide q are q and 1.
When you multiply p and q, it will only be divisible by p, q, and 1.
by Sc00bz
Wed Dec 16, 2009 3:48 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: Maths behind MD5
Replies: 12
Views: 10258

Re: Maths behind MD5

Interesting... As for encrypting message "t".. Is t the entire text, made into one large number?.. Or is it for every character in t?.. That's one of the things I've never quite understood about this :P It is normally just a large random number (like 128 bits) used as an encryption key for a symmet...
by Sc00bz
Wed Dec 16, 2009 3:19 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
Replies: 8
Views: 9431

Re: FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF

I bet you this regular expression matches FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF for MD5 and any other 128 bit hash:
[a-z]*
by Sc00bz
Tue Dec 15, 2009 6:39 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: Maths behind MD5
Replies: 12
Views: 10258

Re: Maths behind MD5

Interesting.. But not so close to what I'm looking for... Right now, I'm looking for an explanation as to why prime numbers are so damn interesting in assymetric cryptography.. Other than that they're only divisable by 1 and themselves.... Else, thanks for the link ;) With RSA two large primes, p a...
by Sc00bz
Sat Dec 05, 2009 9:12 pm
Forum: General Talk
Topic: what kind of hash it is?
Replies: 2
Views: 3586

Re: what kind of hash it is?

It looks like it could be base 64 which would mean it's 192 bits of data.
Where did it come from?
by Sc00bz
Mon Nov 30, 2009 6:59 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: sha 512 decode
Replies: 5
Views: 7073

Re: sha 512 decode

The default number of rounds is 5000. Each round may use up to 3-4 SHA512s.
by Sc00bz
Thu Nov 19, 2009 3:42 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: DES Cracker BETA
Replies: 137
Views: 244216

Re: DES Cracker BETA

Where is the old version? Which old version??? The one where you had to do this: schwarzwaldDES BETA 3 Win:v1.03 Written 2009 by Schwarzwaldhacker CudaV1.3 GeForce GTX 295, Processors: 240 Clock rate: 1.242 Mg. ************************************************* Do you agree NOT TO HARM directly or i...
by Sc00bz
Wed Nov 18, 2009 1:47 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: DES Cracker BETA
Replies: 137
Views: 244216

Re: DES Cracker BETA

Where is the old version?
I wanted to test if "echo y | blah" works.
by Sc00bz
Sun Nov 15, 2009 10:11 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: How high can you get
Replies: 260
Views: 211223

Re: How high can you get

C1060 is a GTX 280 with more ram (4 GiB vs 1 GiB), slower memory bandwidth ("102 GB/s" (I calculated this to be 1/2 that so it might be wrong or it can do 2 request per clock) vs 141.7 GiB/s), and less power consumption (187.8 W vs 236 W). http://en.wikipedia.org/wiki/Comparison_of_Nvidia_graphics_p...
by Sc00bz
Sat Nov 14, 2009 5:12 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: Distributed crypo-network discussion
Replies: 204
Views: 144758

Re: Distributed crypo-network discussion

You should use T as in trillion instead or write like 900.000,0B because it's hard to tell the difference between that and 900,000B.
So that's 900T/sec.
by Sc00bz
Thu Nov 12, 2009 7:43 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: How high can you get
Replies: 260
Views: 211223

Re: How high can you get

Isn't there a 8 GPU limit with CUDA.
by Sc00bz
Sat Nov 07, 2009 8:49 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: GPU overclocking to increase hash/sec
Replies: 25
Views: 20057

Re: GPU overclocking to increase hash/sec

BarsMonster wrote:How about 2.6*2*4 = 20.8B with 4x5870x2? :crazy:
That's 8 GPUs ATI only supports 4 GPUs. Also a 5870x2 is called 5970.
by Sc00bz
Tue Nov 03, 2009 11:14 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: New codebase testing 0.B version
Replies: 76
Views: 219259

Re: New codebase testing 0.B version

Wouldn't it make more sense to dynamically allocate the necessary number of threads?
Then you can say "no limit" or more correctly "limited by hardware, drivers and/or operating system."
by Sc00bz
Tue Nov 03, 2009 6:14 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: New codebase testing 0.B version
Replies: 76
Views: 219259

Re: New codebase testing 0.B version

BarsMonster wrote:
Sc00bz wrote:How does --gpu_mask work with 128 GPUs?
Everything over 32 is always enabled :-)
Then why is there a set limit?
by Sc00bz
Tue Nov 03, 2009 1:29 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: New codebase testing 0.B version
Replies: 76
Views: 219259

Re: New codebase testing 0.B version

How does --gpu_mask work with 128 GPUs?
by Sc00bz
Tue Nov 03, 2009 12:31 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: doubts on md5 cracking
Replies: 20
Views: 14822

Re: doubts on md5 cracking

Well the obvious answer to a problem like this is to give a reply of "the md5 of 'hello' and the password is ...." If the hash was "D8578EDF8458CE06FBC5BB76A58C5CA4" which is just the md5 "qwerty" Then your reply would be "the md5 of 'hello' and the password is 996EB1C6D3EB5ADCC5785DFE972A4A5F" Sinc...
by Sc00bz
Thu Oct 29, 2009 9:59 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: New codebase testing 0.B version
Replies: 76
Views: 219259

Re: New codebase testing 0.B version

This happens because days left is more than 2^31. I guess if days left is more than 2^31 then ETC could say "NEVER" or have it state time left in millions of years.
by Sc00bz
Mon Oct 05, 2009 7:54 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: Reversing the Last 7 Sub-Rounds of MD4
Replies: 5
Views: 5994

Re: Reversing the Last 7 Sub-Rounds of MD4

You can reverse the last 16 and 2 half steps "sub-rounds" of both MD5 and MD4. Also you can stop early and check 32 bits which gives you a one in 4 billion chance of needing to do the next step. In all you only need to do 27 and 2 half MD4 steps or 43 and 2 half MD5 steps. Also this works with any l...
by Sc00bz
Wed Sep 30, 2009 8:31 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: How high can you get
Replies: 260
Views: 211223

Re: How high can you get

Btw, 2x4870x2 shows 4600M speed (not with BarsWF as it cannot support multiple ATI GPUs). Too bad it's impossible to have more than 4x ATI GPUs at system (driver issue). But upcoming 5870x2 should be 2.2x times faster than 4870x2, so 10 000M will be possible with single system. Ohh hey benchmarks o...
by Sc00bz
Tue Sep 29, 2009 10:46 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: How high can you get
Replies: 260
Views: 211223

Re: How high can you get

Ohh crazy I just found out that Nvidia finally switched over to one PCB instead of having two PCBs facing each other. I heard awhile ago that they would do this "sometime." I was so going to say that you don't see water cooling for GTX295s because you can't do that yet. Well you can buy them pre-ins...
by Sc00bz
Tue Sep 22, 2009 5:55 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: CUDA supported bruteforcers
Replies: 35
Views: 29779

Re: CUDA supported bruteforcers

IvanG wrote:5. MySQL as it's totally different algorithm from MD4/5/SHA1 (and it's possible to get really big numbers for it :)).
There are two MySQL algorithms MySQL3.23 (62 bit hash) and MySQL SHA1 which is "*"+sha1(sha1(pass)).
by Sc00bz
Thu Sep 17, 2009 8:55 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: How high can you get
Replies: 260
Views: 211223

Re: How high can you get

P4s are faster with HT off. So it looks like they made HT better.
by Sc00bz
Thu Sep 17, 2009 8:50 pm
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: how can i optimized my program. who can help me.
Replies: 14
Views: 11761

Re: how can i optimized my program. who can help me.

Hmm... Just realized that your password generation idea might be better than mine :-) Are you talking about his first post? Yes. :o maybe I need to write a brute forcer. Well... how are you generating the next pw, the same way? Just letting you know that you need to test which one is faster __mul24...
by Sc00bz
Thu Sep 17, 2009 5:27 am
Forum: BarsWF, Cryptography, Security, GPGPU and supercomputing
Topic: how can i optimized my program. who can help me.
Replies: 14
Views: 11761

Re: how can i optimized my program. who can help me.

BarsMonster wrote:Hmm... Just realized that your password generation idea might be better than mine :-)
Are you talking about his first post?