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Showing 10 of 10 results by Sottilde
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Board Bitcoin Discussion
Re: MtGox claim site is up! Everyone who claimed say haaaay ...
by
Sottilde
on 21/06/2011, 21:12:49 UTC
The claim site is overloaded. I think Mtgox is just going to cash out on this one. Oh wait, they don't even have an exchange to cash out on.

Erm, how about the cash?
Post
Topic
Board Bitcoin Discussion
Re: A Secure and Redundant Savings Wallet Concept, Hopefully
by
Sottilde
on 21/06/2011, 21:08:34 UTC
Why not just create a split WinRAR archive with a strong password and do the same with the USB keys?  Seems an awful lot easier to me than messing with TrueCrypt.
Post
Topic
Board Economics
Re: The upside to the MtGox hax
by
Sottilde
on 20/06/2011, 17:54:23 UTC

In that sense I can sympatise with MtGox, but on the other hand.....
  • They didn't add even the simplest of extra sec checks to their login
  • They didn't assume the worst and proceed as such when reports started surfacing that accounts were being hacked
  • Their database should have been natively encrypted, performance issues are not a customers concern


Agreed on these points.  They don't even do basic IP verification (non-recognized IP, send email with verification link).  They really need to step it up.
Post
Topic
Board Bitcoin Discussion
Re: TradeHill API was coded by amateurs
by
Sottilde
on 20/06/2011, 03:12:12 UTC
Alright great, I disagree with OP.

At least we all can agree OP is a moron though.  Roll Eyes

The troll threads tonight have been neverending.  This is one of the worst, along with that "proof" thread where the OP didn't understand that a large sell order would not be matched by a single large buy order.

The posturing wannabe programmer here is almost as bad.
Post
Topic
Board Beginners & Help
Beware virus/trojan being sent to most Mt.Gox emails
by
Sottilde
on 20/06/2011, 03:10:57 UTC
This has been going around with a ~500KB attachment:

Dear Mt.Gox user,

Our database has been compromised, how you already know.

To protect your account in the future, please download the Certificate (self-extracting archive) from Attachment and install it.

If you were using the same password on Mt.Gox and other places (email, mybitcoin.com, etc),
you should change this password as soon as possible.

Please accept our apologies for the troubles caused, and be certain we will do
everything we can to keep the funds entrusted with us as secure as possible.


Any unauthorized access done to any account you own (email, mtgox, etc) should
be reported to the appropriate authorities in your country.

Thanks,
The Mt.Gox team


Expect to see more like this if your email was leaked.  It may be prudent to give up your email address as the spam will likely never stop.
Post
Topic
Board Beginners & Help
Re: Basic Questions About Brute-Force Attacks
by
Sottilde
on 20/06/2011, 03:00:58 UTC
but in an offline attack how do they know they got the right answer ? (ie cracked it)

Essentially any brute force client (GPU, CPU, whatever) will run billions of iterations of this:

1. Generate string
2. Grab salt (usually part of the input, at least in the case of the FreeBSD MD5 that Mt.Gox used)
3. Run crypt(string, salt), which in the FreeBSD implementation actually hashes about 1000 times
4. Check if output is expected output.
5. Repeat the above.

The nice thing about the salted FreeBSD-style MD5 is that it is pretty computationally expensive to run.  High-end GPU setups only manage about 3 MH/S, and CPUs about 12 KH/S per thread (I managed 48KH/s on an overclocked i5 750).  This slows down potential crackers considerably.   At 48KH/s, you can expect an 8-char password containing all possible characters (num, letters, specials) to take some 2.93*10^12 years.  On a GPU it is orders of magnitude better but still on the order of years.

It is very likely that the major account that was hacked was only compromised because it had its password encrypted using the old DES encryption Mt.Gox used to use until 2 months ago.  If that password was retrieved at any point and not changed it would be easily used to wreak havoc.
Post
Topic
Board Beginners & Help
Re: DiabloMiner on Dual 6990 + 64Bit Ubuntu, Second GPU not working. Advice?
by
Sottilde
on 20/06/2011, 02:54:12 UTC
I have heard a few success stories with GuiMiner for Windows - I know the hate for Windows but you should be getting ~375MH/s per GPU, so about 1500MH/s total - maybe it's enough to make a compromise.
Post
Topic
Board Beginners & Help
Re: POLL: What name would you give to the smallest unit of bitcoin (0.00000001)?
by
Sottilde
on 20/06/2011, 02:53:00 UTC
Picobit?
Post
Topic
Board Beginners & Help
Re: Noob To Bitcoing, Have a 4890
by
Sottilde
on 20/06/2011, 02:52:34 UTC
What miner are you using?  If you're using something like GuiMiner (http://www.softpedia.com/get/Tweak/Video-Tweak/GUIMiner.shtml) it should be trivial to select the GPU client.  2MH/s sounds like CPU to me.
Post
Topic
Board Bitcoin Discussion
Re: Blind Bitcoin Transfers
by
Sottilde
on 06/06/2011, 22:20:05 UTC
Loving the site.  Great job, it looks great and I'm sure there are some users with a need for this service.