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221  Economy / Trading Discussion / Re: Bitcoin-Central - why don't people use this exchange?? on: May 04, 2012, 02:57:36 AM
Don't reinvent the wheel, use bcrypt, it was designed specifically for that use case, it is designed to be slow which is a good thing for a password hash function.

You don't want to rely on a specific hasher as your only means of security.  Realistically, it prevents brute forcing but dictionary attacks are still possible (which is where you should really focus on).  bcrypt does make it slow for the normal person to crack but there are still big unknowns in it and the more "secure" scrypt.

bcrypt has two known problems: it's not as slow as originally thought if you threw enough money at it (FPGA, ASIC) and there is a problem with the implementation that gives it something like at least a 4% chance of collisions.  They have not been studied enough, hence it is somewhat like security through obscurity (it took them many years of use before they found out that the standard implementation of bcrypt that just about everyone uses was flawed and would take many more years to completely phase out the bad implementation).

And as was already mentioned, if it's not used with proper safeguards, DoS attacks are possible.
222  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: May 03, 2012, 03:48:55 AM
There's a DDoS in progress.  The network provider won't allow any new connections to the site but those that use miners that use keep-alive connections are still able to mine until the connection closes.

You don't happen to be on Rackspace do you? A bunch of our services went down for a few minutes until they nulled the offending IP.
yeah, i was checking that too.  it's rackspace,

Yup, rackspace.. though my other business has a few servers with them as well (separate account) and those were fine.
223  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: May 03, 2012, 01:46:15 AM
There's a DDoS in progress.  The network provider won't allow any new connections to the site but those that use miners that use keep-alive connections are still able to mine until the connection closes.
224  Bitcoin / Pools / Re: [459 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: May 02, 2012, 06:30:38 PM
So when will this be re-enabled? It sounds like you already have the code in-place to do this.

It was removed and had to be re-implemented.

You should be able to change your passcode now.
225  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: May 02, 2012, 06:29:28 PM
Now that there's been a few blocks I have a question. Why does your estimated btc immediately drop after a block is solved and rewards are given out even if I've been continuously mining? I haven't experienced that at any other DGM pools.

That's how DGM works.  Every time a payout is made, you lose some of your score/reward for the next estimated payout.  I'm not sure if there are any sites that show a graph of your historical estimated rewards or update the estimates as frequently as we do (approximately every minute) so you wouldn't notice it at other pools unless you kept track of it manually.

The amount of dropoff depends on the dynamic fee and cross-round leakage.  If you've been using Eclipse, I believe the leakage is 0.99, which will have little dropoff every time you get paid.  The lower the dropoff, the longer it will take to get your rewards to fully mature and you'll need to mine for a longer time period to reach equilibrium.

Meni uses the analogy of a capacitor:

In the capacitor analogy, every miner has a capacitor which is charged as he submits shares, and its charge level affects how much he gets per future block found.

If you read the method's description you'll see that finding a block has two effects:
1. Giving out rewards to miners who currently have a score
2. Decrease the score of miners who currently have a score
It has no effect whatsoever on future miners (or on the rewards of current miners for shares they will submit in the future - only those that they submitted in the past).
226  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 29, 2012, 09:06:25 PM
Thanks, I ended up doing something really ridiculous I'll probably never remember but I wanted to try out the pool ha. I see I joined when we're nearly taken 2 days to finish a block, not sure if that's standard here or just bad luck but I'll try it out, thanks for having this great pool with such an awesome interface.

Thanks for signing up Smiley  Luck is pretty bad on this round.  We're currently at 5m+ shares and the average should be about 1.5m.

Some tools for managing really ridiculous passwords:
http://xkcd.com/936/
http://keepass.info/
http://www.keepassx.org/
227  Bitcoin / Bitcoin Discussion / Re: [SOLVED] Bitcoin's chicken and egg problem on: April 29, 2012, 08:29:16 AM
I sent another message to admin, it should be there now. I still don't understand why the other board admins/mods didn't get back to me about this issue.
maybe they didn't get your other messages either.
228  Bitcoin / Bitcoin Discussion / Re: [SOLVED] Bitcoin's chicken and egg problem on: April 29, 2012, 06:57:40 AM
I've had a serious bitcoin related issue with Ogrr for the last month or so, and have not gotten any help or responses from the admins there. Hopefully it's an unusual circumstance, but it doesn't look good.

this is news to me.  admin's mailbox is empty.  how have you gone about seeking help for your problem, and what is your problem?

I've messaged superior and killbill and have received no response. I just messaged admin, but I have no record of the message being sent.

Admin hasn't received any messages.  you can pm me the problem here or post it publicly here or on Ogrr.
229  Bitcoin / Bitcoin Discussion / Re: [SOLVED] Bitcoin's chicken and egg problem on: April 29, 2012, 05:18:16 AM
I've had a serious bitcoin related issue with Ogrr for the last month or so, and have not gotten any help or responses from the admins there. Hopefully it's an unusual circumstance, but it doesn't look good.

this is news to me.  admin's mailbox is empty.  how have you gone about seeking help for your problem, and what is your problem?
230  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 29, 2012, 04:27:54 AM
So what determines something being common? Or is that something internal that you don't know the specifics of?

It's based on analysis done by others using leaked passwords on social sites.

The common words database used contains:

- Lists of top 20-100 words used in cracked passwords from various sources
- Top common names according to certain sites
- Dictionary words used by password crackers

Common names are on the list because the analysis showed many cracked passwords contained common names.

The list is English-centric so common international words will probably sneak by.
231  Bitcoin / Bitcoin Discussion / Re: Diablo 2 Ladder Reset Competition May 2nd - 2000 BTC in prizes on: April 29, 2012, 12:41:33 AM
When wil lewt.com be accepting Bitcoins as payment directly on their webiste?

soon!
232  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 29, 2012, 12:40:34 AM
Well I highly doubt what I had is any sort of common word and it wasn't part of my username. I mean part of it was a name, and doing a quick wolfram alpha search, is not common at all. I'll play around with it and see if I can get anything to work.

If you absolutely must have a certain word in the password and it's complaining about it being common, you can increase the length of the password until it gets accepted.  For example, if the password "common123" was rejected, you could try "common12345678" instead.  Also, it's not only common words but common names as well.
233  Bitcoin / Bitcoin Discussion / Diablo 2 Ladder Reset Competition May 2nd - 2000 BTC in prizes on: April 29, 2012, 12:12:54 AM
$40,000 in store credit for Diablo 2 items at http://lewt.com or $10,000 in Bitcoin as prizes.

https://ogrr.com/viewtopic.php?t=3104
234  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 28, 2012, 11:48:30 PM
I'm confused on how to even make an account. Everytime I try to set it up I get '

"Password contains common text"

But I don't see anywhere where there are rules on the password other than length and I've tried just letters, letters and numbers, and letters with numbers and special characters soooo...

It'll let you know what the problem is.  In your case, the password you chose was considered weak because it contains some words it considers too common.  Passwords must have at least a letter and non-letter (number or special character), can be from 8 to 128 characters, can't contain your username, and must pass the common words check unless it is sufficiently long.
235  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 28, 2012, 02:44:52 PM
I think it's fixed now.  It was an issue with IE8.
236  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 28, 2012, 07:38:59 AM
shows no error i click save and nothing shows up in the list and when i try and connect to that worker with my miner i get an auth error

Can you PM me the worker name you're trying to add, browser you're using, and whether javascript is enabled?
237  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 28, 2012, 05:43:07 AM
Umm just thought you should know that the site is not allowing me to create a worker on my account

What error is it showing when you try to add it?  Have you tried a different worker name?  Perhaps it doesn't like some of the characters in the name.
238  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 27, 2012, 04:53:46 PM
Yeesh, it's almost as if this pool is suffering from the same curse that MtRed suffered through a couple weeks ago.  It was plagued by a string of really bad "luck" that turned out to be the result of merged mining.  They disabled it and variance got back to normal. 

I think the higher variance lately is a product of the lower hashrate since the big hopper left.  Luck had been just about even until the last block and we've had merged mining going for several weeks now.  Did Mt. Red's bad "luck" begin right when they turned merged mining on?

239  Bitcoin / Project Development / Re: [20 BTC] Multithreaded Keep-alive Implementation in Bitcoind on: April 27, 2012, 06:36:37 AM
For anyone that still wants to use this for the 0.6.0 release, I've made some patches with slight modifications to David's code.  It's split up into two parts.  The first part should still be relevant for pool operators (keep-alive connections, hub mode, USR1 signals on block changes).  The second part is mostly obsolete now with merged mining and better pooling software (faster getwork).

You can find the patches at http://pastebin.com/viJV1NLi and http://pastebin.com/UXep0r3c

Some of the updates from 0.4 to 0.6 are non-trivial so this should help.  This particular patch hasn't been tested much but a different one for 0.6.0 rc4 has been running without any problems.

Edit: Oops, the patches were for the current head instead of 0.6.0.
Edit2: Updated the above links for the right patches.

For future reference, these may give you a head start on patching against 0.6.1: http://pastebin.com/XSBqRAaP and http://pastebin.com/5R9N29aA.
240  Bitcoin / Pools / Re: [151 GH] MaxBTC.com Pool - Merged NMC, Zero Fee, DGM, LP, API, SSL, Port 80 on: April 26, 2012, 11:26:49 PM
thanks for the info. That devpage needs a username and password though?

whoops.  fixed the link.  just click on statistics > block statistics from the homepage to get there.
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