Bitcoin Forum
May 01, 2016, 07:22:37 PM *
News: New! Latest stable version of Bitcoin Core: 0.12.1 [Torrent]
 
  Home Help Search Donate Login Register  
  Show Posts
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 [20] 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 ... 457 »
381  Alternate cryptocurrencies / Altcoin Discussion / Re: How To Mine Scrypt Coins With ASIC or FPGA? on: September 05, 2013, 10:32:00 PM
From another thread:

Bitcoin is mostly hashing, so most of an ASIC would be SHA256 cores stamped out side by side on the chip.  Such cores are fairly compact.

I'm not a Litecoiner, but I believe they have it set to require 128KiB of memory per core.  That means you have to stamp out (core) (128KiB) (core) (128KiB) across the chip; therefore you get far fewer cores per chip.

The alternative is to have an ASIC with a memory bus to some external DRAM chips.  That makes the RAM cheap but you now have to get a much bigger ASIC for all the bus lines, and you still won't get very many cores on a chip before the RAM speed becomes a bottleneck.

Originally people thought the RAM requirement would prevent GPUs from being useful at all.  That was wrong, but I don't think they can escape the RAM bottleneck generally, so ASICs, like GPUs, will be limited mostly by the RAM you can attach.  That might change if someone can put together an inexpensive ASIC with RAM on die.  I don't expect that to happen faster than the rate GPU-mem-bandwidth-per-dollar increases, but you never know.

I do think LTC was too conservative with their memory size.  They were trying to keep it in L2 cache to keep it targeted at general purpose processors, but I think they would have done better requiring a few hundred megs per core.

tldr: If there ever is an ASIC for scrypt, it won't be one that gives a improvement two orders of magnitude over GPUs like SHA256 ASICs gave.
382  Economy / Service Announcements / Re: Bitcoin exchange affiliate program on: September 05, 2013, 05:44:20 PM
CaVirtex affiliates will earn 30% of net revenue from each customer they register in the customerís first year of trading and 10% of net revenue in each succeeding year.

That's pretty incredible.   Imagine a bank sharing with its affiliates nearly a third of the ATM fees on every withdrawal, and a third of all debit card merchant fees for every purchase made by customers that the affiliate signed up or an account.
383  Alternate cryptocurrencies / Altcoin Discussion / Re: What would happen if ASIC on Scrypt chain? on: September 05, 2013, 05:15:01 PM
In technical terms, what would happen if someone with a bunch of ASIC miners pushed their machines onto a Scrypt chain?

Obviously, an ASIC for SHA256 mining cannot do Scrypt mining.   

So you are asking what would happen if an ASIC that does Scrypt were invented?

It probably depends on how the ASICs are put into play.  If they are intended to be units for sale to the public, then it might be something that would benefit the leading Scrypt-based alt.  If the units are intended to be used in a 51% attack, then it is lights out for whatever Scyrpt-based alt(S) they target.
384  Bitcoin / Press / Re: 2013-09-05 Forbes.com - Follow The Bitcoins: How We Got Busted Buying Drugs On S on: September 05, 2013, 03:42:59 PM
-1 for using the "busted buying drugs" in the headline.   Silk Road's E-Wallet can be used without placing any orders whatsoever so there simply being proof that funds were sent to Silk Road doesn't prove anything other than that you sent funds to Silk Road.  The researcher was not able to conclude that the funds had been used to purchase drugs.

Additionally, there was no bust.  Nobody was arrested nor was there any law enforcement involvement whatsoever.   So the title was a shameless attempt to drum up page views.
385  Bitcoin / Press / 2013-09-05 Forbes.com - Follow The Bitcoins: How We Got Busted Buying Drugs On S on: September 05, 2013, 03:37:00 PM
Follow The Bitcoins: How We Got Busted Buying Drugs On Silk Road's Black Market
by Andy Greenberg


Quote
With the data from just 344 of their own transactions, they were able to label the owners of more than a million Bitcoin addresses. And by making just four deposits and seven withdrawals into accounts held on Silk Road, Meiklejohn says the researchers identified 295,435 addresses as belonging to that drug market.
-
Once our bitcoins had been mixed up with other usersí bitcoins in the Silk Roadís 40 bitcoin account, it became impossible to track them further. So even though Meiklejohn could show that we had deposited bitcoins into a Silk Road account, she couldnít see that those bitcoins were later paid to a drug dealer

http://www.forbes.com/sites/andygreenberg/2013/09/05/follow-the-bitcoins-how-we-got-busted-buying-drugs-on-silk-roads-black-market/
386  Economy / Goods / Re: 2005 Dodge Ram 1500 SLT - Low Miles! Chicago area on: September 05, 2013, 02:37:09 AM
BTCBitcoin gladly accepted!

Would be nice if you put that into the listing.  There is a marketing concept known as touchpoints, which says that a typical person becomes aware of a brand after experiencing a certain number of "touchpoints".   So a person might see "bitcoin" for the first time in a Craigslist ad, or it might be their fourth time.   Either way ... even that little addition helps to build the Bitcoin brand.

 - http://sbinfocanada.about.com/od/marketing/a/brandbuildingsg.htm
387  Bitcoin / Legal / Re: List of court cases, complaints, regulatory actions, etc. on: September 05, 2013, 01:53:43 AM
Advisory Opinion Request to U.S. Federal Election Committee (FEC)
August 13, 2013
Location: Washington, DC, USA

Abstract: A Political Action Committee solicits the FEC's opinion on varios aspects of Bitcoin being accepted for political campain contributions.

Quote
CAF wishes to accept Bitcoins as monetary and in-kind contributions from individuals and organizations otherwise lawfully able to contribute. CAF also intends to sell, spend, and directly contribute these Bitcoins. These actions are similar to those permitted by other Advisoiy Opinions, including BARTERPAC and Cogswell, and the FEC should have no concern in pennitting them. So CAF can ensure compliance with FECA and FEC regulations, CAF seeks guidance on valuing, retaining, selling, spending, and contributing Bitcoins received as contributions.

Advisory Opinion Request of Conservative Action Fund PAC
 - http://saos.nictusa.com/aodocs/1245451.pdf
 - http://bit.ly/17FKUC1 (via browser-based PDF viewer)

Feds could allow Bitcoin campaign donations
 - http://www.politico.com/story/2013/09/bitcoin-campaign-donations-96301.html?hp=l12
388  Bitcoin / Bitcoin Discussion / Re: Hardware device and protocol for seeding and verifying Provably Fair gaming on: September 04, 2013, 11:37:31 PM
I didnt understand the bitzino example You gave. did  You mean that the bitzino verification is from a neutral source and cant be manipulated?

Yup.  two pieces of information (the hash they provide and then after that the seed my client provides) are known by me before each play.  Then after the game is played the secret is revealed.   It can be proven later that their secret [Edit: deck] didn't change as it should hash to the same value they provided prior to the game play.  

So then for shuffling the deck bitZino uses a few functions, sha256, MersenneTwister19937, and FisherYatesShuffle.

The pseudocode for it is at the bottom of this post:
 - https://techblog.bitzino.com/2012-06-30-provably-fair-shuffling-through-cryptography.html

So after the game is over I can verify that the results of the deck shuffle were not altered during play.  From there each game can be verified.  Each type of game has a unique challenge.  Even though I know how the cards were shuffled for blackjack, for instance, I would still need to track each play -- where did I stand or bust on the hand, did I split, etc.    So that part of the verification isn't necessarily generic.  The player's actions would need to be fed to a verifier that knows the rules of the game.

This technology won't be something the casinos would be anxious to develop.  So this would be an innovation rising from the bottom-up, pulled forward because it protects the player from a dishonest operator (or even an operator that is unaware of a bug or other situation causing players to not be paid out properly).
389  Bitcoin / Development & Technical Discussion / Re: A mistery hidden in the Genesis Block on: September 03, 2013, 11:07:17 PM
Satoshi did one more joke on us before fading away. Tomorrow, I will tell.

A new mystery about Satoshi hidden in the Bitcoin block-chain
 - http://bitslog.wordpress.com/2013/09/03/new-mystery-about-satoshi/

by Sergio Demian Lerner,  ‏@SDLerner on Twitter.
390  Economy / Gambling / Re: Any good bitcoin slots? on: September 03, 2013, 09:46:18 PM
I see BitcoinVideoCasino.com has slots now:
 - https://bitcoinvideocasino.com/slots
391  Bitcoin / Press / Re: 2013-09-03 contrariancompliance.com: No Banking, No Bitcoin on: September 03, 2013, 09:36:35 PM

Individuals are today selling bitcoins by accepting cash deposits (e.g., using Bitcoin-Brokers.org) through their bank account.  Some of them might be considered money transmitters by FinCEN, I suppose.   Will banks need to scrutinize every account that sees a cash deposit to try to figure out if the transaction was for a digital currency trade?
392  Bitcoin / Bitcoin Discussion / Hardware device and protocol for seeding and verifying Provably Fair gaming on: September 03, 2013, 09:30:23 PM
The innovation referred to as "Provably fair" gaming is an innovation that has driven the growth of Bitcoin-based online wagering.

The problem with Provably fair is that actually verifying each hand (or round, play, etc.) from the service to ensure it was truly fair is something very difficult to do, today.   Each site has its own verification techniques and the ones that use a random number generator for the client seed includes challenges for verification as well.    If a provably fair site were to want to cheat, it could probably get away with it for a while before some techie was manually performing verification analysis and discovered that cheating had occurred.

This is not a bitcoin-gaming specific challenge.

I see the need for some protocol so that the game can get the client seed from a user-defined source not under the control by the gaming service (e.g., a browser plug-in, or external, consumer-owned, hardware device even), and then then after each play the plug-in or device would then verify that the results of the game were computed accurately.

There's probably only a handful of seed + verification approaches that would suffice for most provably fair gaming offered today.  I know that BitZino uses at least two, as their slots needed a different approach (factoradics) than their other games needed:
 - https://bitzino.com/about/fair

If this seed + verification protocol were created and plug-ins and/or devices were available, most Bitcoiners would only play the online gambling services where this protocol is offered.   Competitive forces would draw other services to use the protocol as well, possibly even into the casino industry where Bitcoin is not (yet) even used.

At a minimum, such a protocol would give Bitcoin-based online wagering added legitimacy since you would no longer need to trust that the provably fair service isn't cheating you.

Any thoughts on the topic?
393  Economy / Gambling / Re: What is the best bitcoin casino? on: September 03, 2013, 08:38:23 PM
One nice thing about SatoshiDICE is that it is easy to externally audit.  It grew so fast because it was among the best methods for wagering.   There is no way for me to know for sure if the wagers that appear in the chat (troll) box for wallet-based wagering sites are actual wagers or if they've been fabricated to make it look like lots of play is occurring.

BitZino had publicly shared some growth numbers some time ago and they were impressive:
 - https://bitzino.com/about/numbers/10_million_hands

But still even if all the Bitcoin-based online casino sites were doing as well, the aggregate amount is still a tiny fraction of all online wagering, which itself is a tiny fraction of casino gaming that occurs.

But not having the most popular wagering service doesn't mean it isn't either sustainable or useful.  But collectively the sites keep getting better (e.g., see http://BitcoinVideoCasino.com's latest update), providing more value (e.g., the higher payout available with http://just-dice.com), available in a wider scale (e.g., Bitcoin Video Casino's mobile app for Android), more entertaining (e.g., ....  [your suggestions here]), etc.

394  Economy / Service Discussion / Re: Is FastCash4Bitcoins ever coming back? on: September 03, 2013, 08:00:28 PM
* With the exception of clients in the states of VA, NY, and CA at this time.

With most banks having branches in multiple states, are there restrictions from me opening a Wells Fargo account in, oh say, Nevada with my California address?  [Update: Or is it the address of the customer and not the location of the home branch that determines the state, as far as FastCash4Bitcoins is concerned?]
395  Alternate cryptocurrencies / Altcoin Discussion / Re: Ripple starts to conquer the world from China on: September 03, 2013, 07:39:28 PM
Ripple will never be open source.   It is just the bait to build the network.  Once it is large enough there is little reason to open source it.

Would the arrival of the day men with guns show up to confiscate hardware and shut it down increase the likelihood they release as open source?

Today Ripple is being used as the successor [Edit: a successor] to the "redeemable code" -- a debt-based voucher.  Releasing as open source is the only way for that network to continue [Edit: and existing XRPs held by anyone to continue to have value] after such an event.
396  Bitcoin / Bitcoin Discussion / Re: What if dev-team is compromised? on: September 03, 2013, 06:01:30 PM
Probably fork right, but what fork?

Well, let's take the unintentional change to the Bitcoin protocol that happened with the Bitcoin-Qt/bitcoind v0.8 release.

It caused a hard fork.

It took less than an hour for a sufficient amount of hashing capacity to conclude that coins mined using v0.8 blocks would become worthless and thus abandon it to go back to the protocol as it exists in v0.7 and prior (or use a v0.8 patch that fixed the incompatability).

That's because the economic majority favored the v0.7 side.  

 - https://en.bitcoin.it/wiki/Economic_majority

And that's for a change that introduced that unwanted behavior had slipped through undiscovered.  An intentional change to alter the protocol would likely not go unnoticed as there are many eyes on every change to the source that is released:
 - https://en.bitcoin.it/wiki/Release_process
397  Bitcoin / Technical Support / Re: Accidently sent bitcoin to first genesis block, any way to get it back? on: September 03, 2013, 07:17:46 AM
Bitcoin payments are irreversible, just hope that satoshi read this and send your coin back to you

Sending a large chunk there and claiming it was an accident would be a nice attempt to see if Satoshi is monitoring this forum!
398  Economy / Economics / Re: $-100,000 a day could some one explain how this runs on: September 02, 2013, 02:51:56 AM
There will always be seigniorage in the bitcoin world as the transaction fees will support the miners

But that isn't seigniorage.   That's simply fees paying the freight.
399  Economy / Speculation / Re: How to explain google trends vs BTC/USD ratio? on: September 01, 2013, 09:48:15 PM
How could we explain this spread between btc price and google trends.

The first time I learned about the word twerking I did what many others did and googled it.  

I've heard the word twerking hundreds of times since and occasionally have seen it occur but I've not once done a search on it in ever since.

So even though there is (presumably) more twerking occuring today than there was yesterday, the frequency of Google searching for twerking is down today versus yesterday.

So similarly, for Bitcoin, Google trends will spike when there is an influx of those who are becoming aware of bitcoin for the first time, but Google trends can drop even though the actual subject of the term is seeing an increase in activity.

But because financial speculation discussion (due to a rising exchange rate) is the primary reason people are learning of the term "bitcoin", the google trends will lag, not lead, the exchange rate.  Thus Google searching for the term bitcoin can drop significantly without the exchange rate falling as well.
400  Bitcoin / Technical Support / Re: Bitcoin QT Asking For Passphrase to Receive BTC on: August 31, 2013, 07:16:40 PM
I only thought "passphrase" was needed to send not receive BTC.

The logic for that is that you don't want a key added to your wallet without your explicit permission.
Pages: « 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 [20] 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 ... 457 »
Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!