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1  Bitcoin / Development & Technical Discussion / How to Prevent a 51% attack: Multiple PoW algorithms + PoS ??????? on: June 13, 2014, 06:01:16 PM
Posting this here from reddit as this guys idea seems really interesting:

Could we combine algorithms together?

After reading kuui1's comment[1] I had an idea, but since I'm not a programmer, it might not make sense:
Myriadcoin uses 5 algorithms running concurrently to secure a single blockchain. Each algorithm has the same chance of finding the next block reward and gpus, cpus can mine along w/ sha and scrypt asics. Using a 5 seperate algorithm in this manner means an entity would have to gain the majority of hashing power of the majority of algorithms to achieve a double spend attack which means they'd need far greater than 51%

Now what if we add PoS to this, and have proof of stake coins work as some kind of referee over the miners making sure double spends and transactions cannot be held back. This way the people owning the coins can make sure the people mining the coins are doing so fairly.
This could also work to incentivize running full nodes. What if 5% of the block reward was paid out to the full nodes? Who are also helping do the proof of stake.

The Proof of stake workers could run/oversee 50% of the network while the miners run the other 50% making coins. This way if an evil entity like ghash gets 51%, they'll only have about 25%. (not sure if this makes sense)
Or maybe even forget the whole 5 algorithm thing, stick with what we have now and just add PoS on top?

http://www.reddit.com/r/Bitcoin/comments/282b18/proposal_multiple_pow_algorithms_pos_i_hope_this/
2  Bitcoin / Project Development / Looking for a coder/developer who works with Perl and bitcoin on: December 14, 2013, 05:37:01 PM
Im looking for someone with experience in the perl language (at least 3 years) who can update a site I have to accept and use bitcoins.

Its a complicated project with MLM style features, levels, payment processing and automatic payments all with bitcoin. Just to make it clear, It is not a pyramid scheme, It will be similar to kickstarter or indiegogo. Right now its set to accept regular payments via paypal, I want to completely overhaul it to accept and use only bitcoins.

Any questions via pm.
3  Economy / Auctions / 51GH KNC Miner group buy shares - 10.5BTC auction staart on: August 11, 2013, 02:00:29 AM
This auction is for 20 shares of ragingazn628's KNC miner group buy totalling 51.2GH/s minus 2% for his hosting fee.

Here is his post, ctrl+f for "mik3" to find me. https://bitcointalk.org/index.php?topic=233624.0

Starting bids is 10.5BTC which equals around ~$20/0.2BTC PER GH
Increments of 0.1BTC
Auction ends Tuesday Aug 13 @ 10PM EST (New york time)

I will notify winner here and by PM, and also notify ragingazn628. payment should be sent to me within 24 hours after ragingazn628 transfers share ownership to you and PMs you this info. (this will act as escrow as you will pay me after he has confirmed share transfer)

After shares are transferred to you by ragingazn628, you should send BTC to: 1FV5SVSRiHQZ3Tq6TYYzXZs8JwALFfVBYu
If BTC is not transferred to this address after ragingazn628 has confirmed share transfer to you, I will notify him to move the shares back to me.

Good luck and happy bidding.

Timer removed. End time: 2013-08-13+21:00:00CDT
4  Bitcoin / Hardware / Will Avalon Batch 3's ever make ROI? on: July 13, 2013, 02:32:46 AM
With KNC/Bitfury/Terrahash/ASICminer/etc + Avalon chips coming online very soon, and no way to recoup Batch 3 costs in 1 month as originally planned by Bitsyncom, do you think ROI is likely?

I tried some numbers and it looks like with the difficulty going up the way it is now it would take 4-5 months to make the coins back. But with all those other companies coming online, I am thinking ROI seems impossible. Someone convince me otherwise, I am contemplating getting a refund  Cry Cry
5  Bitcoin / Hardware / *** [Pre] *** on: June 08, 2013, 11:24:14 PM
**********CANCELLED FOR NOW*********************
**********CANCELLED FOR NOW*********************
**********CANCELLED FOR NOW*********************
6  Economy / Currency exchange / WTS: 40,000 Ripple -> 3 Bitcoin Or best offer on: May 05, 2013, 02:37:09 AM
*edit nevermind, pls delete.
7  Bitcoin / Development & Technical Discussion / Forgot Passphrase - variations of words and capitalizations on: April 08, 2013, 04:39:22 AM
Hey everyone, I recently made a new passphrase and then forgot exactly the capitalization/word arrangement of the words I used.

Is there any program/script or anything I can enter a bunch of words into and it would try different variations of capitalization, arrangement of the words and word variations that I enter? I forgot what I put first or last and which words had capitals or were fully capitalized, how many exclamation marks I used at the end and which variation of words I used, for example step or stepped or stepping.

Thank you for any help!
8  Bitcoin / Hardware / Avalon batch #3 - order "on-hold" ? on: March 28, 2013, 02:11:16 AM
So my money was sent, I see my order in their order page, is on-hold normal?

Here is a screenshot: https://i.imgur.com/WypEwET.jpg
9  Bitcoin / Mining / Can't withdraw from BTC Guild? on: March 22, 2013, 07:27:52 PM
the PPS earnings show 0.04352482 for the past 3 days now,

yet Account Balance = 0.00883340

And when I try to withdraw it says i need at least 0.01
Is this a glitch in their system?
10  Economy / Trading Discussion / Canadian Exchange Cavirtex IPO Today on: March 21, 2013, 09:39:14 PM
https://www.havelockinvestments.com/fund.php?symbol=VTX

Anyone buying? Already half gone.
11  Bitcoin / Bitcoin Technical Support / bitcoins not confirming after 30~ hours satoshidice on: February 28, 2013, 11:49:29 PM
 I did a --rescan on the client, no help. And the transactions can't be found in blockchain info.
Everything was working before and after these, just these couple got screwed up.

Are they gone?
12  Bitcoin / Bitcoin Discussion / FIXED: Lost Bitcoin when transfering to different wallet! on: August 22, 2011, 11:14:38 PM
Hi there i would really appreciate if any one could solve my problem or explain what has happened!

Yesterday (AUG/21/2011) i opened my main wallet in my usb drive and mounted to the bitcoin folder and opened and everything was perfect, blocks up to date. so i needed to take out 10coins from that wallet to my temp wallet so i used a valid key from the temp wallet that i previously used to deposit.
so as soon as i send the 10coins to the valid address i got the msg saying payment send! and -10 coin in transaction.
but when i mounted the temp wallet i didn't see the unconfirmed or anything regards to that transaction till now still nothing not even a gray notification NOTHING!

so i went and deleted the bitcoin folder and downloaded all the blocks again and mounted the wallet and still nothing. i used the wallet in different computer and nothing!

so i went back to my main wallet and in transaction it says the same -10 and 0 unconfirmed.

so i did another test using same valid address but for .50 coin and right away i saw the transaction in my temp wallet and after 1hour i got few confirmation.

NOW i need to know where the hell did that 10 coin went i copy and paste a valid address (checked it 50000times)

solution:
thx to PLATO

1. close the bitcoin from task.
2. run bitcoin from cmd (bitcoin.exe -rescan)
 
to avoid this problem dont close your wallet right away after transaction!!


13  Other / Beginners & Help / 3rd Video Card Doesen't Fit in Case on: July 09, 2011, 01:03:38 PM
Anyone know what to do?

Here is my mobo: http://www.overclock.net/attachments/completed-transactions/173505d1285181139-sale-asus-p6td-deluxe-motherboard-dsc09300.jpg

My 2nd and 3rd pcie slots are way at the bottom of the mobo, my 2nd video card goes into that 2nd white one thereby blocking the last 3rd black slot thats right near the base of the case, i can't even fit a pcie extender cable in there. Are there any cheap larger cases that have room on the bottom?

Or should i just cut out the bottom of the case and prop it up on taller legs? thanks for any help. Don't want to remove the mobo and have the whole thing just lying on my desk.

thanks for any help.

*edit, or is there anything that can convert pci-->pcie slot with extender?
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