For sale immediately: my Hashflare cloud mining account with quite a bit of Scrypt hashrate.



Account would cost $13.50 * 252 (Scrypt) + $1.20 * 20 (SHA256) = $3426 new on Hashflare. Asking $3000, willing to consider reasonable offers (but don't waste my time). Payable in BTC or ETH - either you send first or escrow required; I'm fine with anyone well-known.

Upon confirmation of payment or escrow payment, I will contact Hashflare to transfer the account to your email address, after which you'll be able to login and change the withdrawal address to your own.

I have a MtGox account (about a year old) that I had used a bit upon opening it but not much until recently, when I deposited around 40 BTC, conducted some trades, and now have (about) 52 BTC.

Unfortunately, my joy was dampened significantly upon discovering that I am now seemingly unable to withdraw this balance via any means I can find; even upon attempt of Bitcoin withdrawals as low as 0.01 BTC, the system returns an "Account Pending Review - Please Verify" (paraphrased) error. My "Funding Options" page lists daily withdrawal limits as 100 BTC / 1000 USD, as it always has, but this seems not to be reflected in my actual ability to withdraw funds.

I have never channeled large amounts of funds through this account, I only possess one account, and I have never accessed it through Tor.

As I have no desire to verify due to privacy concerns, I'm curious as to what methods, if any, exist for withdrawing funds from an unverified account, preferably ones that do not take too long.

Cross-post: https://bitcointalk.org/index.php?topic=186134.0.

I'm excited (and a bit terrified) to announce the upcoming launch of RentAHash (RAH), an intermediary system designed to connect buyers and sellers of hashing power in a manner efficient and safe for both involved parties and the chief consumer of my Friday nights over the past few months. Think GPUMAX, just less sucky and not run by a $5M USD Ponzi operator.

First, a disclaimer:

I am a legal minor (age 17). Some members here, for reasons I do not entirely disagree with, prefer to avoid conducting business with minors. My age is neither a hindrance nor an excuse, but if you wish to avoid RAH because of it, let this serve as fair warning. If you have legitimate concerns with my ability to successfully execute a project such as this due to my age, by all means, let me know, but otherwise I have no desire to debate or argue over this.


This community being what it is (40% ex-SA trolls, 30% clueless idiots, 10% intelligent assholes, 10% blatant scammers, 5% psychopaths, 2% bored college kids, 2% eccentric entrepreneurs, 1% Phinneaus Gage, and 1% people who can't count), I think I'll somewhat reverse the usual marketing strategy and start off by attempting to convince you that I fall into whichever of those categories you find least objectionable.

When GPUMAX launched, quite a few prominent members of this community expressed concern over the danger this kind of service could pose to the network. Mike Hearn put it best upon the launch of a similiar service "Hashpower" a few months ago:


While I agree with most of Mike's excellent points, I actually think that this kind of service will help, not hinder, the network. Moreover, I think may even be necessary for the network. Crazy? Perhaps, but hear me out.

First, to address Mike's concerns:

Security risks associated with "anonymous" miners:

RentAHash is pseudononymous much as Bitcoin is. While usernames, IPs, and other such potentially identifying information are not public, the current active clients (share purchasers) are publicly displayed (connection information, name if applicable) along with the approximate amount of hashpower being directed their way. Miners, if they so wish, can limit their share destinations through their choice of either a whitelist or blacklist (default-deny/default-accept). Whether they choose to do so or not, no one can "secretly" purchase hashpower through RAH, just as no one can "secretly" send bitcoins.

Risk of double-spends:

RentAHash limits any individual client to approximately 5% of the current total network hashrate (clients are manually reviewed upon submission to ensure no duplication or proxying takes place). Once a running order has reached this speed, the system automatically adds another order with a different client running in parallel to the first. This continues indefinitely as required; order parallelism is unlimited (the backend algorithm is a bit more complicated, but this is essentially what happens).

"Selling votes":
This is true for RAH just as it is true for pool mining. You take a risk by selling your shares to any potentially untrustworthy entity in return for the reward of increased revenue. If you can realistically solo mine, I encourage you by all means to do so. Most of us, however, don't have that ability. RAH minimizes this risk as much as possible by allowing you full control over where your shares do or do not go. You can use whitelist (default-deny) filtering, blacklist (default-accept) filtering, or no filtering if you should so prefer.

Now, some benefits:

The myriad of pools, protocols, reward division methods, fee structures, share difficulties, and the like is intimidating and confusing, especially for those new to Bitcoin. RAH gets rid of nearly all of this.

Ease of connection:

To mine at RAH, all one need do is register for an account, enter a URL into their miner, and press enter.

Simple, understandable fees and payment:

Fees are 2% flat globally and applied to clients (share purchasers) only, miners need not deal with them at all. Payment is simple PPS, tracked and visible sitewide.

Competitive, open market:

Clients bid for shares; the client (or clients, if multiple orders are running) with the highest bid at any given time receives shares. All relevant market data is completely public. (read: fancy statistics and pretty charts)

Share difficulty independence:

Shares are tracked, purchased, and paid for on a difficulty 1 equivalent basis; though difficulty is set by the client in question, miners need not understand or deal with it at all.

Protocol conversion:

We support all three major protocols (Getwork, Stratum, and Getblocktemplate), and convert between them when possible. Neither miners nor clients need concern themselves with this. Clients set the order protocol at time of purchase, miners connect with whichever protocol they prefer. Our system handles all the rest.

Security:

No system is impenetrable, but we try to approach as close to that asymptote as possible through systemwide default deny, multiple safeguard levels, automated monitoring, and frequent penetration testing.

A few specifics to note:
1) All user data is completely immutable from creation. No one can hack your account and withdraw to a different address, simply because it is impossible to change the withdrawal address of an account. (The only exception: If you absolutely need to, you can sign a password change request with the Bitcoin address registered when you created your account, though this is intended only for emergency use.)
2) Emails are never required or used. To access your account, an attacker must possess both your username and password. To actually steal money from it, they need your username, password, and private key, in which case you're probably screwed anyway. (Constructing arbitrary-high PPS value orders to quickly empty an account is, however, possible; there is no easy way to prevent this. Though our automated monitoring system should theoretically flag the order for manual inspection and shut it down, we highly recommend that you keep your password safe. If password security is an recurring issue for you, I recommend a password manager such as KeePass)
3) We have an active bug bounty of value proportionate to the severity of the exploit. If you find one, let us know - we'll pay you, no questions asked.

And lastly, why is it necessary?

In short, Bitcoin is transitioning from the plaything of early adopters with deep pockets to a serious contender in the financial scene. We just recently hit a $1 billion market cap. Especially with recent fiascos in the EU and general global economic instability, this currency is attracting interest from more than just the far reaches of the early adopter side of the bell curve. With that comes popularity, soaring prices, and optimistic predictions, but also danger. So far, we've been hit with a few psychopath Ponzi operators, many less prominent scammers, a few private key thefts, and a handful of network exploitation attempts. Nothing even near catastrophic. I suspect that, no matter what measures I implement, some hacker cleverer than I will probably attempt to use RAH to implement a double-spend attack. Better the network face that now, in a protected, monitored, limited, and easily terminatable enviroment, rather than when a major government decides Bitcoin is a thread, invests a few million in ASICs, and brings the network to its knees in a matter of hours.

All the above said, the last thing I want to do is hurt, whether directly or otherwise, the Bitcoin network and by extension Bitcoin itself. I'd appreciate any thoughts, concerns, criticism, or comments you'd be gracious enough to send my way. And if RAH ever becomes a serious threat to the network, I will shut it down immediately, regardless of personal cost.

The site is mostly built; I'm putting on a few final touches and running a smorgasbord of tests at this point. Launch will probably happen in a few weeks, assuming nothing goes awry. I put this thread up in an attempt to garner useful feedback, suggestions, concerns, comments on my personal hygiene, large-font trolling, stupid youtube links, etcetera.

Fire away!

Disclaimer: I am a US citizen by birth.

Disgusting. All idealistic notions of liberty just get thrown away without a second glance when someone introduces a little chaos into our precious order. Self-appointed internet justiciars completely destroying the future of perfectly innocent people based on racial profiling of cell phone pictures and speculative Facebook profile browsing. Street mobs cheering on the police, waving American flags, chanting "USA". "Euphoria in Boston" tops the CNN front page. Constitutional rights tossed aside at the whim of prosecutors. And I thought witch hunts ended a few centuries ago.

Perhaps Christopher Nolan was not a director, but a prophet.

Mostly just sounding out the arena here. I'm nearing completion on a Bitcoin-related project of mine, and I'm interested to know if anyone here would be capable of providing penetration testing services for BTC. References required; I'm not interested in hiring random denizens of the 'net. Payment negotiable. If you are interested or know of someone who might be, please let me know on this thread or via private message.

According to the wiki, difficulty can be calculated by dividing the maximum target by the current target.

However, I'm unclear on how exactly the target value returned from a getwork call is encoded (and more importantly, how it should be de-encoded to calculate difficulty using this method).

Do I simply swap it to little-endian (and if so, how?), or is there a more complicated process?

Example code (Python) using the current target:


Any advice would be appreciated.

Title is pretty self-explanatory. Any amount considered. PM me or reply with offers.

I. Introduction

Over the past few months, I've observed a general trend on this forum that I think is rather disturbing. We have always disagreed and debated on a vast variety of subjects, but more and more often of late those debates seem to turn into or in some cases start as nothing but 'flame wars', to use the colloquial term. This forum, once a reasonable facsimile of a haven for intellectual and civil discussion, has mutated into a wasteland of mud-slinging, baseless accusations, fear-mongering, utterly nonsensical FUD, mob mentalities, and worst of all, xenophobia. This is most pronounced in the Marketplace and associated sub-forums, but seems to be permeating throughout the extent of these boards.

II. Why The Marketplace Matters

Some of you probably avoid the Marketplace altogether, and wonder if it really matters. Regardless of where you prefer to spend your time, the fact remains that Bitcoin is a currency. Trade is necessary for both a healthy economy and, perhaps more importantly, recruitment of new users.

III. Mud-slinging

We all disagree with each other. If we didn't, we'd have nothing to talk about. But disagreement does not have to translate into insults.
Ad hominem reasoning not only fails to provide any result of worth for either involved party; it poisons the general topic of discussion and makes the thread useless for any future or current readers. One simple insult can create multiple threads of incoherent flaming.

IV. Baseless Accusations

These threads tend to sound like tabloid articles. Inciting headlines, extravagant claims, and no logical evidence whatsoever to back them up. If you have a serious accusation and want results, please make a factual claim and back it up (Example). Factual and civil trade disagreement threads have a much higher rate of resolution. Remember, whether the counterparty is a scammer or not, they are a human being, and a successful dispute resolution is much more likely if you treat them like one.

V. Fear-mongering

This sometimes goes hand-in-hand with the above, but sometimes not insomuch an accusation as chaos-inciting content, often simply links to other threads with an eye-catching title attached. First of all, we do not need multiple different threads to discuss the same thing. Second, if you're going to make extravagant claims, at least take the time to make them yourself.

VI. Utterly Nonsensical FUD

Also known as spam. I receive quite enough of this in my email inbox. If you don't have anything useful or intelligent to post, don't post. It's as simple as that.

VII. Mob Mentalities

Also known as the 'exponential thread growth problem'. Don't take what other people say at face value, and don't simply repeat other's sentiments. All of you have something unique to contribute to discussions. Contribute it!

VIII. Xenophobia

This one concerns me the most, as I think it could have far-reaching implications. Most people who read about Bitcoin and come here have read almost ubiquitously negative press discussing drugs, Ponzi schemes, and ever-imminent collapse. They decided to take a chance and investigate for themselves. What do they find? A community which refuses to do business with anyone relatively new. A community filled with animosity. Half the forums polluted with allegations of Ponzi schemes. In other words, they find exactly what the media told them to expect. Their conclusion? The media is right. Do we really want to embody what the media portrays us as?

IX. Addendum: BS&T

First of all, I will admit that I am most certainly not an unbiased observer. I did my research and invested into BS&T. I have no factual conclusion as to whether it is a Ponzi or not, nor do I think I have enough expertise to surmise a claim. But, regardless of whether BS&T is a ponzi, an innocent company investing in third-world medical care, or an elaborate hoax conceived by Bernie Madoff's hitherto unknown twin, endlessly fretting and arguing about it will accomplish nothing whatsoever.

Those of you with convinced BS&T is a Ponzi scheme, I'm glad you're being cautious with investment. Please refrain from starting hundreds of separate threads stating nothing new whatsoever. Perhaps it is a scam, perhaps not. I know some of you have far superior wisdom which you are ever eager to share, but us mere mortals are still capable of intelligent analysis and decision-making. If BS&T truly is a Ponzi, somehow I suspect we will notice.

X. Conclusion

I'm just some nameless forum member writing another rant, albeit perhaps not on one of the usual subjects. All I ask is that you read and think upon it. Perhaps this won't make any difference. But it certainly wouldn't have if I didn't write it.

Best regards,
BinaryMage

I'm not going to name names or point fingers, but this is starting to get annoying. We can all read the thread titles, we can all follow your signature links. Do you really need to clutter up threads unnecessarily with blatant advertising for Mining Bond/Pirate Pass Through/Other Security X? It just annoys those of us who want to see any updates on something we've invested/are interested in without wading through pages of irrelevant nonsense about other bonds, wait time on whatever magical next-gen product BFL has put out, and whatever new variation on an HYIP Pirate is being accused of. I don't know if we can really do anything about the latter two, but it seems the first would be easy to correct.

Please, keep your advertising to your own threads. Keep debates about an asset to the actual thread on that asset. If you have an issue with someone's business idea, post it once, not all over five different mostly unrelated threads. If you think yours is better, fine. Demonstrate so in your thread, and people will come to you. Trust me, it'll make the forum a better place for all of us.

Alright, I'm done whining and ranting. Fire away.

No matter how much you beg, pray, or pay, perfection isn't going to float to you on the ground gift-wrapped with a nice fat transaction fee for expedient delivery. But reaching gets you a little closer to the sky.

In short, we're getting nowhere with the move to new forum software, and we may end up waiting indefinitely for something that might not ever exist, much less exist now. While no solution exists to my knowledge that offers all of the requested features, there are many programs which would be a significant improvement over SMF.

This is not a whining thread. I'm not demanding anything, I'm not calling doom, I'm not issuing ultimatums that no one cares about. I'm asking what I, as a community member, and more broadly we, as a community, can do to move this forward in a realistic time frame. I'm not suggesting that we give up our initiative for custom software, only that we make progress now.

I suggest we implement an interim solution that improves the forum, though it may not provide all that a custom one would, and continue the bounty for custom software. This would provide two main advantages over continuing the trek up a hamster wheel: improved features and usability and tangible progress, both of significant importance and both immediate. I have never administrated a forum as large as this, nor have I ever transferred a forum from one management system to another, but it seems a transition to pre-existing, documented software from pre-existing, documented software should not be particularly hard to implement. Summarily, this would be an immediate solution that would provide significant improvement, stem the tide of forum-bashing, and be moderately easy to install.

Obviously I cannot do any of this alone. So, my questions are:

To moderators and administrators: Are you willing to pursue something akin to this? If so, what can we do to help?

And to users: The two I immediately thought of were vBulletin and Invision Power Board, but what forum software would you suggest?

Is there a server colocation provider that accepts Bitcoins? I couldn't find one on the Trade page or with Google, but if anyone does offer colocation services I'd be interested...

I'm programming a simple miner in Java to increase my understanding of how the mining protocol works. I've successfully got it to request work, but I'm having issues parsing the getwork from the server.

Sending the getwork nets me a response like this (from ABCPool in case it matters):

All my attempts to parse this (I'm just trying to parse the data field) using substrings (simplistic, but I thought it would work) have resulted in utter nonsense. Googling resulted in nothing useful. Would someone be as kind as to enlighten me?

Thanks in advance,
BinaryMage

I see a lot of questions on best clocks, options, miner program, and the like to use for any particular card. The hardware comparision page on the wiki used to be a viable resource, but I think it can be rather intimidating and is not uniformly formatted. I think it would answer a lot of questions before they are asked if we had a thread listing the best (aka highest MHash) settings for common mining cards.

I will maintain the first (and second if need be) post of this thread as a hopefully organized and easy to read list. Please post only if you have beaten the previous MH/s record for that card.

EDIT: In order to better provide the information this thread is designed to provide, I am now adding an overclocking limitation. Core clock can be no more than 100 MHz or 20%, whichever is lower above the stock core clock for the reference model (aka AMD stock reference). This is being implemented to more effectively convey effective software settings. Comments or suggestions are always welcome.

Do note that this is not a overclocking bragging thread. This is a thread designed to server the majority of miners, and certain criteria apply:

• Air Cooling or (Sane) Water Cooling Only
• No Hardware Modifications
• Must Run Stable for at least 24 Hours
• Invalid Shares under 2% for 24 Hours
• Stock Voltage

If you got a 5870 to 600 MH/s for two minutes by taking it apart, resoldering and rebuilding it, and running it in a pool of liquid nitrogen, that's wonderful, but that's not what this thread is for. I can't cover everything; use your judgement as to what is or is not appropriate. Remember, this thread is to serve the majority of miners. Please keep it as such.

The following information is required (feel free to use the template) when submitting a result:

• Card Manufacturer (AMD/Nvidia) Ex. AMD
• Card Model Number Ex. HD 5870
• Card OEM (XFX/BFG/Sapphire/etc) & Designation Ex. XFX Black Edition
• MHash per Second (Bitcoin SHA256 mining, not alt-chains) Ex. 430
• Core Clock (In MHz) Ex. 900
• Memory Clock (In MHz) Ex. 300
• Average Operating Temperature (In Degrees Celsius) Ex. 70
• Ambient Temperature (In Degrees Celsius, this can be an estimate) Ex. 20
• Fan Speed (Percentage) Ex. 80
• Host OS (Windows/Linux, list distro/version) Ex. Windows 7
• Driver Version (Both SDK & Catalyst if applicable) Ex. Catalyst 11.6 & SDK 2.4
• Mining Program (Phoenix/Diablo/CGMiner/GUI-miner) & Version Ex. Phoenix 1.7.3
• Command Line Flags (or settings for GUIMiner, in any case excluding username and password) Ex. -k phatk2 DEVICE=0 VECTORS FASTLOOP=false BFI_INT AGGRESSION=11

The following information is optional when submitting a result:

• Watts Drawn While Mining (Average) Ex. 200
• Other Information (anything you feel is relevant)

Template:

Example complete result submission:
Card Manufacturer: AMD
Card Model Number: HD 5870
Card OEM: AMD (Reference)
MHash per Second: 430
Core Clock: 950
Memory Clock: 300
Average Operating Temperature: 60C
Ambient Temperature: 17C
Fan Speed: 60%
Host OS: Debian (BAMT)
Driver Version: Catalyst 11.6, SDK 2.4
Mining Program: Phoenix (custom)
Command Line Flags/GUIminer Settings: -k phatk DEVICE=0 VECTORS FASTLOOP=false BFI_INT AGGRESSION=11
(Optional) Watts Drawn While Mining: Not Measured
(Optional) Other Information: N/A

Results Table:

Manufacturer	Model	OEM	Avg MH/s	Core (MHz)	Memory (MHz)	Card (C)	Ambient (C)	Fan	OS	Driver	Program	Flags/Settings	Watts	Other
AMD	5670	Sapphire	90	850	300	58	21	Auto(Norm. < 50%)	Linux	FGLRX 11.12, SDK 2.1	Phoenix	-k phatk2 VECTORS2 WORKSIZE=128 AGGRESSION=6 -v -q 2	N/A	N/A
AMD	5830	Sapphire	279	925	180	68	30	20%	Win7 x64	Cat 11.11 Minimal	cgminer 2.6.5	-k diablo, worksize: 256, vectors: 1, intensity: 9, gpu-threads: 2	N/A	1.065V
AMD	5850	MSI OC Edition	330	850	560	64	20	37%	Win7 x64	Cat 12.3	CGminer 2.4.1	diablo kernel, intensity gpu0=8, gpu1=14	N/A	1.024V
AMD	5850	MSI (Ref)	400	850	560	72/77	18	40/42%	Win7 x64	Cat 12.3	DiabloMiner	-v -w 128	N/A	Undervolted to 1.037V, Validity Questionable
AMD	5870	AMD (Ref)	430	950	300	60	17	60%	Debian (BAMT)	Cat 11.6, SDK 2.4	Phoenix (custom)	-k phatk DEVICE=0 VECTORS FASTLOOP=false BFI_INT AGGRESSION=11	N/A	N/A
AMD	5970	PowerColor	704	775	300	66	21	50%	Debian (BAMT)	SDK 2.4	Phoenix	Default	N/A	N/A
AMD	6870	Diamond	323	1000	300	58	18	45%	Win7	Catalyst 11.1, SDK 2.5	GUIminer	-v -w128 BFI_INT	N/A	N/A
AMD	6950	ASUS (DCUII)	372	900	775	67	19	70%	Win7 x64		CGMiner 2.2.7	Default, I-8	N/A	Stock Voltage 1.10V, Locked Shaders
AMD	6950	XFX	423	935	1000	50	22	H2O	Win7 x64		CGMiner	I-8	N/A	Stock Voltage, Unlocked Shaders
AMD	7970	Diamond	729	1225	625	56	24	H2O	Win7 x64	Catalyst 12.3	DiabloMiner	-v1 -w256	238	N/A

My MtGox account was hacked about two hours ago this morning. Password is secure, computer uninfected. (Password changed immediately) MtGox shows a large number of support requests. Is this just my account or is something larger going on? Luckily, I didn't lose much, but I certainly would rather not have. The bitcoins were sent to address 1ffaB9W2hj2pzp9djKupFfsaNn1L215FE. Not likely that it will ever be used again, but I thought it prudent to keep record.

So, two questions. I was away from Bitcoin for awhile and have just come back, so I'm somewhat unfamiliar with the much-changed MtGox. Is it possible for me to somehow recover my Bitcoins, and if not, what security steps do I need to take to prevent this happening again, assuming the problem was on my end? My computer is firewalled and virus-protected. My password was alphanumeric, random, and long enough to make brute forcing astronomically unlikely. I use Peerblock and Tor, though not one-hundred-percent of the time. Any tips?

Oh, and I'm sorry if this is in the wrong forum; I wasn't entirely sure where to put it.

EDIT: Thanks to some helpful users, this problem has been solved. Turns out I just behaved stupidly and fell for a phishing scam. Thank you to everyone for your excellent help!

I don't know if anyone on this forum plays Runescape or knows someone who does, but I'd like to sell a fairly nice account of mine.

Account name: BlackMage 9X
Total Level: 506
Combat Level: 62
Wealth: Approximately 350k gold in bank plus some items
Black Mark Points (Infractions): 0

I can provide more info upon request. Prices are negotiable - I'm not entirely sure what this is worth. Feel free to make any offers you feel are reasonable.

I transferred some money from my Dwolla account to TradeHill almost an hour ago, and though Dwolla shows the transaction as completed, TradeHill still shows it as "In Progress". I though Dwolla to TradeHill transfers were instantaneous. Is this normal or did some problem occur?
Thanks in advance for your help.

With the numerous recent hacking incidents on Bitcoin-related sites, most notably Mt. Gox, I think we need to step up our game in terms of account security. While the break-in at Mt. Gox could probably have been prevented, it nonetheless stands to reason that something like it will happen again, and maybe with more devastating and less reversible consequences. We need a better security system for our accounts.

Bitcoin is a currency, and we need to get used to that. Many online banks, stock trading services, and such have multiple-step verification processes, where you must enter a password and a code, whether is changed every thirty seconds and stored on a small dongle, in the case of E-Trade, or sent to you mobile phone, in the case of Gmail. With a system such as this, the financial accounts of Bitcoin users would be much more secure.

Mt. Gox, Tradehill, BitcoinMarket, and the like, this is a message for you. Your users want security, and we're willing to give up a bit of convenience for it. Systems like Gmail's are not hard to implement, and are much more secure than a simple password. Bitcoin is not a toy currency, not a simple experiment for fun.  Bitcoin is worth real money, and we need to protect it as such.

I can't access Deepbit right now. (And my internet works, I tested it)

Is anyone else experiencing this problem? Did they get DDOSed again?