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Mining Dogecoin on S3 [Question to pro miners]

So I was able to find a used ANTMINER S3 speed is 400GHS not over clocked and in good condition for the price of USD$131, I have almost free electricity and option for free electricity as well, so how long do u think it will pay it self up if I put it on free electricity, and will it be a fine idea mining dogecoin with it or switch to multi pool? I never really had SHA256 miners or any kind of miner, used CPU before bitcoin was cool but all this is new to me since this country was in war and had a very long internet blackout which is the reason I lost all my bitcoins that was on MTGOX and instawallet "Both got hacked lost 33BTC".
Any advice like best pools, what profit to expect will be welcome and I will be thankful, I am buying the S3 anyway since I rushed into buying it and only waiting for it to ship now, and I am willing to use it to help in dogecoin community for fun and profit.
submitted by KawaiGurl to dogecoin [link] [comments]

/r/bitcoinsec - Wiki: Timeline of Heists

Hey all!
This stickied thread is temporary: Data will be moved to wiki so users can update.
therealbobsaget proposed the idea of keeping a relatively accurate record of Bitcoin heists. I believe the idea is great, and we can utilize the Wiki to store this information down for historical reasons.
From History_of_Bitcoin#Theft_and_exchange_shutdowns:

Mt. Gox:

On 19 June 2011, a security breach of the Mt. Gox Bitcoin exchange caused the nominal price of a bitcoin to fraudulently drop to one cent on the Mt. Gox exchange, after a hacker allegedly used credentials from a Mt. Gox auditor's compromised computer illegally to transfer a large number of bitcoins to himself. They used the exchange's software to sell them all nominally, creating a massive "ask" order at any price. Within minutes the price reverted to its correct user-traded value. Accounts with the equivalent of more than US$8,750,000 were affected. Source Source Source Source

Bitomat:

On July 2011, the operator of Bitomat, the third largest Bitcoin exchange, announced that he lost access to his wallet.dat file with about 17,000 bitcoins (roughly equivalent to US$220,000 at that time). He announced that he would sell the service for the missing amount, aiming to use funds from the sale to refund his customers. Source

MyBitcoin:

In August 2011, MyBitcoin, a now defunct Bitcoin transaction processor, declared that it was hacked, which caused it to be shut down, paying 49% on customer deposits, leaving more than 78,000 bitcoins (equivalent to roughly US$800,000 at that time) unaccounted for. Source Source

Bitcoinica:

In early August 2012, a lawsuit was filed in San Francisco court against Bitcoinica — a Bitcoin trading venue — claiming about US$460,000 from the company. Bitcoinica was hacked twice in 2012, which led to allegations that the venue neglected the safety of customers' money and cheated them out of withdrawal requests. Source Source

Bitcoin Savings and Trust:

In late August 2012, an operation titled Bitcoin Savings and Trust was shut down by the owner, allegedly leaving around US$5.6 million in Bitcoin-based debts; this led to allegations that the operation was a Ponzi scheme. Source Source Source Source. In September 2012, the U.S. Securities and Exchange Commission had reportedly started an investigation on the case. Source

Bitfloor:

In September 2012, Bitfloor, a Bitcoin exchange, also reported being hacked, with 24,000 bitcoins (worth about US$250,000) stolen. As a result, Bitfloor suspended operations.[116][117] The same month, Bitfloor resumed operations; its founder said that he reported the theft to FBI, and that he plans to repay the victims, though the time frame for repayment is unclear. Source

Instawallet:

On 3 April 2013, Instawallet, a web-based wallet provider, was hacked,[119] resulting in the theft of over 35,000 bitcoins[120] which were valued at US$129.90 per bitcoin at the time, or nearly $4.6 million in total. As a result Instawallet suspended operations. Source

Bitcoin+Android PRNG:

On 11 August 2013, the Bitcoin Foundation announced that a bug in a pseudorandom number generator within the Android operating system had been exploited to steal from wallets generated by Android apps; fixes were provided 13 August 2013. Source

Inputs.io:

A Bitcoin bank, operated from Australia but stored on servers in the USA, was hacked on 23 and 26 October 2013, causing a loss of 4100 bitcoins, worth over A$1 million. Source

Global Bond Limited (GBL):

In Hong Kong a Bitcoin trading platform owned by Global Bond Limited (GBL) vanished with 30 million yuan (US$5 million) from 500 investors on 26 October 2013. Source

SilkRoad:

After the arrest of SilkRoad's owner, the FBI claims it has confiscated over 144,000BTC. Source

Sheep Market (post-silkroad):

The debate concerning the Sheep Market heist of 96,000+ BTC is still ongoing, there has been talks of the owners simply taking the money and running, while the owners claim that their operations were "hacked". Source

Users:

301BTC were taken from SatoshiChrist's blockchain.info wallet. Attack method unknown, what is known is lack of 2FA may have lead to attacks capturing his wallet information from either phone or system.
Found a great thread over at Bitcointalk.org containing even more heists:

Linode hacks:

Besides the aforementioned Bitoinica, Bitcoin.cx and Bitcoin faucet among others were affected by this attack. Response by Linode

Allinvain Theft:

In 2011 a miner and Bitcointalk.org user "Allinvain" awoke to find 25,000BTC were transferred out of his wallet. He believes his system may have been infected by the attackers. Source
Will be updating periodically. Leave heist information and sources in comments, thanks!
submitted by bitcomsec to bitcoinsec [link] [comments]

GPU-friendly mining. 1m BTC market cap. 84m coins. 2.5 minute blocks. A Bitcoiner's report on Litecoin.

Litecoin, a Bitcoin-like Internet currency has seen its network gain significant hashing power in recent weeks, but the currency's long-term prospects remain unclear. This post aims to provide more information about the Litecoin network and currency.
In early to mid 2013, Bitcoin mining is likely to become largely unprofitable for GPU-miners due to the rise of efficient Bitcoin mining ASICs. It is expected that many GPUs will be removed from securing the Bitcoin network and will be redeployed for other purposes. Besides Bitcoin mining, there are three such uses for these GPUs: 1) gaming, 2) password recovery and security testing and 3) non-Bitcoin cryptocurrency mining. Since Litecoin is the cryptocurrency with the next greatest hashing power and is most efficiently mined with GPUs, understanding the current status of the Litecoin network and economy is desirable for those studying the options. Below, I have gathered information to help inform a decision on whether to commit resources to Litecoin.
Miners
The current hashrate of the network is roughly 3 gigahashes per second (GH/s). Due to Litecoin's scrypt-based mining algorithm, Litecoin hashrates are generally 1000 times slower than when mining Bitcoin on comparable hardware. Therefore, this hash rate is produced by an amount of hardware that would produce 3 terahashes per second (TH/s) on the Bitcoin newtork. The current 15-day window estimate for Bitcoin hashrate is 40 TH/s meaning the Litecoin network is roughly 7% the strength of the Bitcoin network.
Source: http://litecoinpool.org/pools, http://bitcoin.sipa.be/speed-lin-ever.png
History
Litecoin's genesis block was mined on Thursday Oct 13, 2011 at 03:00 GMT. Since then, over 15.5 million litecoins have been mined in the first 310,000 blocks. The network releases 50 litecoins per block which are targeted to be found evey 2.5 minutes on average. The block reward will halve every 840,000 blocks which will cause the network to produce 84 million litecoins in total.
The currency has traded in the 1.22 mBTC to 17.3 mBTC range since its birth. Trading is highly volatile with 40-50% changes occuring on a daily basis. Most trading volume can be found on the BTC-e exchange (https://btc-e.com) in the LTC/BTC market by a margin of 2:1 over the next highest volume of LTC/USD also at BTC-e. Other supporting LTC/BTC exchanges include Vircurex (https://vircurex.com) and BitParking (https://ltcexchange.bitparking.com).
All-time price statistics ------------------------- BTC - high: 17.69 mBTC on 3/12/2013 low: 1.22 mBTC on 8/15/2012 USD - high: $0.75 on 3/7/2013 low: $0.015 on 8/15/2012 
The current exchange rate for Litecoin at BTC-e is 12.3 mBTC or $0.55 for one litecoin.
Source: http://cryptocoincharts.com, http://btccharts.com, http://explorer.litecoin.net
Early-adopter advantage
The ability to acquire currency units cheaply through purchase or mining provided an important incentive to Bitcoin's earlier-adopters. By risking the loss of their time and money they have shared in financial gains proportional to the exchange rate and, by extension, the success of the system. Litecoin has a similar early-adopter incentive with one difference. Its launch into an already-sizeable community meant that a greater number of stakeholders existed from the beginning than were aware of Bitcoin in 2009.
A large proportion of early bitcoins were mined when it was extremely unclear if Bitcoin would last beyond a brief experiment. It is then reasonable to expect that many early users did not keep their wallet files or private keys and that a large proportion of early coins will never be spent. While it is difficult to estimate the magnitude of this effect, it provides a potential source of volatility in the future. In contrast, early Litecoin users, most of which were familiar with Bitcoin, could expect that Litecoin's success would make their coins worth keeping. The %-days-destroyed metric tracks what fraction of the money supply has moved since it was mined and for Litecoin is 60.3% versus Bitcoin's 43.7%.
source: http://explorer.litecoin.net, https://blockchain.info/charts/bitcoin-days-destroyed-cumulative
Diversification
Diversification helps to reduce risk and increase reliability of investments and technological systems respectively. Since Litecoin is the second-most established cryptocurrency and is also blockchain-based it may be used easily to diversify Bitcoin-denominated investments. The unique ease of currency exchange beween this currency pair results from each currency's decentralized management and low transfer fees. While current trading volumes and high volatiltiy limit Litecoin's use for significant and stable diversification, more research into LTC/BTC, LTC/USD, and BTC/USD exchange rate relationships is advised.
From a technical standpoint, Litecoin shares many features and the vast majority of its codebase with Bitcoin. Litecoin therefor provides little additional security benefit to the cryptocurrency ecosphere as bugs found in Bitcoin are likely to apply to Litecoin. Mining infrastructure is probably where Litecoin offers the greatest independence from Bitcoin due to Litecoin's use of the scrypt mining algorithm.
Since Litecoin is very similar in use, Bitcoin-accepting merchants and payment processors can support Litecoin payments with minor modifications to the software they are using though at this time only a small number of businesses accept Litecoin.
Development
The core client Litecoin-qt/litecoind is based on Bitcoin-qt/bitcoind. It is currently at version 0.6.3 and is based on the same Bitcoin software version. It is 8 months behind the current Bitcoin client. The Litecoin codebase is maintained at https://github.com/litecoin-project/litecoin as a fork of the https://github.com/bitcoin/bitcoin project. While the same revision control system is in use, the current development model lacks the formal testing and release verification of bitcoin-qt/bitcoind.
Outside the core client codebase, many of the documents and websites created when Litecoin was launched remain untouched, display incorrect information, or have disappeared completely though a number of new sites and services have appeared in recent weeks.
Service Availability
While Litecoin services such as a block explorer, historical charts, and an Instawallet-like web wallet do exist, there are a number of important services that are not yet available. There is no client-side encrypted web-based wallet comparable to Blockchain.info/wallet or the extensive macroeconomic charts at that same site. Mobile software is also limited to a few mining programs with no mobile wallet or exchange rate monitor apps available. Finally, exchange volume is highly centralized on the BTC-e exchange and there is no payment processor that provides any functionality similar to Bit-Pay or Coinbase.
Conclusion
This report has provided information on the Litecoin peer to peer Internet currency and will likely be obsolete within hours of its release in many of the figures quoted. The reader is encouraged to retrieve updated information from the sources included in the report as they will undoubtedly affect any decision on whether to support Litecoin.
submitted by dsterry to CryptoCurrency [link] [comments]

Too Late To Recover My Instawallet?

I mined bitcoins a while back and had secured a decent amount in an instawallet account. Dumb, I know, but I was leaving town for a week and wanted to setup my miner before I left and never switched the bitcoins over to a secure wallet.
I tried to initiate a claim several times on instawallet, but the site was always down, so I kind of forgot about it for awhile.
Is there any way I can contact someone and recover my wallet? I'm not even sure who ran instawallet or who to contact. Is it too late? I have my instawallet url, so unless they were stolen, they should still be in whatever wallet that url was responsible for, is my thinking.
Any suggestions / guidance would be appreciated. Thanks!
submitted by beewayne to Bitcoin [link] [comments]

GPU-friendly mining. 1m BTC market cap. 84m coins. 2.5 minute blocks. A Bitcoiner's report on Litecoin.

Litecoin, a Bitcoin-like Internet currency has seen its network gain significant hashing power in recent weeks, but the currency's long-term prospects remain unclear. This post aims to provide more information about the Litecoin network and currency.
In early to mid 2013, Bitcoin mining is likely to become largely unprofitable for GPU-miners due to the rise of efficient Bitcoin mining ASICs. It is expected that many GPUs will be removed from securing the Bitcoin network and will be redeployed for other purposes. Besides Bitcoin mining, there are three such uses for these GPUs: 1) gaming, 2) password recovery and security testing and 3) non-Bitcoin cryptocurrency mining. Since Litecoin is the cryptocurrency with the next greatest hashing power and is most efficiently mined with GPUs, understanding the current status of the Litecoin network and economy is desirable for those studying the options. Below, I have gathered information to help inform a decision on whether to commit resources to Litecoin.
Miners
The current hashrate of the network is roughly 3 gigahashes per second (GH/s). Due to Litecoin's scrypt-based mining algorithm, Litecoin hashrates are generally 1000 times slower than when mining Bitcoin on comparable hardware. Therefore, this hash rate is produced by an amount of hardware that would produce 3 terahashes per second (TH/s) on the Bitcoin newtork. The current 15-day window estimate for Bitcoin hashrate is 40 TH/s meaning the Litecoin network is roughly 7% the strength of the Bitcoin network.
Source: http://litecoinpool.org/pools, http://bitcoin.sipa.be/speed-lin-ever.png
History
Litecoin's genesis block was mined on Thursday Oct 13, 2011 at 03:00 GMT. Since then, over 15.5 million litecoins have been mined in the first 310,000 blocks. The network releases 50 litecoins per block which are targeted to be found evey 2.5 minutes on average. The block reward will halve every 840,000 blocks which will cause the network to produce 84 million litecoins in total.
The currency has traded in the 1.22 mBTC to 17.3 mBTC range since its birth. Trading is highly volatile with 40-50% changes occuring on a daily basis. Most trading volume can be found on the BTC-e exchange (https://btc-e.com) in the LTC/BTC market by a margin of 2:1 over the next highest volume of LTC/USD also at BTC-e. Other supporting LTC/BTC exchanges include Vircurex (https://vircurex.com) and BitParking (https://ltcexchange.bitparking.com).
All-time price statistics ------------------------- BTC - high: 17.69 mBTC on 3/12/2013 low: 1.22 mBTC on 8/15/2012 USD - high: $0.75 on 3/7/2013 low: $0.015 on 8/15/2012 
The current exchange rate for Litecoin at BTC-e is 12.3 mBTC or $0.55 for one litecoin.
Source: http://cryptocoincharts.com, http://btccharts.com, http://explorer.litecoin.net
Early-adopter advantage
The ability to acquire currency units cheaply through purchase or mining provided an important incentive to Bitcoin's earlier-adopters. By risking the loss of their time and money they have shared in financial gains proportional to the exchange rate and, by extension, the success of the system. Litecoin has a similar early-adopter incentive with one difference. Its launch into an already-sizeable community meant that a greater number of stakeholders existed from the beginning than were aware of Bitcoin in 2009.
A large proportion of early bitcoins were mined when it was extremely unclear if Bitcoin would last beyond a brief experiment. It is then reasonable to expect that many early users did not keep their wallet files or private keys and that a large proportion of early coins will never be spent. While it is difficult to estimate the magnitude of this effect, it provides a potential source of volatility in the future. In contrast, early Litecoin users, most of which were familiar with Bitcoin, could expect that Litecoin's success would make their coins worth keeping. The %-days-destroyed metric tracks what fraction of the money supply has moved since it was mined and for Litecoin is 60.3% versus Bitcoin's 43.7%.
source: http://explorer.litecoin.net, https://blockchain.info/charts/bitcoin-days-destroyed-cumulative
Diversification
Diversification helps to reduce risk and increase reliability of investments and technological systems respectively. Since Litecoin is the second-most established cryptocurrency and is also blockchain-based it may be used easily to diversify Bitcoin-denominated investments. The unique ease of currency exchange beween this currency pair results from each currency's decentralized management and low transfer fees. While current trading volumes and high volatiltiy limit Litecoin's use for significant and stable diversification, more research into LTC/BTC, LTC/USD, and BTC/USD exchange rate relationships is advised.
From a technical standpoint, Litecoin shares many features and the vast majority of its codebase with Bitcoin. Litecoin therefor provides little additional security benefit to the cryptocurrency ecosphere as bugs found in Bitcoin are likely to apply to Litecoin. Mining infrastructure is probably where Litecoin offers the greatest independence from Bitcoin due to Litecoin's use of the scrypt mining algorithm.
Since Litecoin is very similar in use, Bitcoin-accepting merchants and payment processors can support Litecoin payments with minor modifications to the software they are using though at this time only a small number of businesses accept Litecoin.
Development
The core client Litecoin-qt/litecoind is based on Bitcoin-qt/bitcoind. It is currently at version 0.6.3 and is based on the same Bitcoin software version. It is 8 months behind the current Bitcoin client. The Litecoin codebase is maintained at https://github.com/litecoin-project/litecoin as a fork of the https://github.com/bitcoin/bitcoin project. While the same revision control system is in use, the current development model lacks the formal testing and release verification of bitcoin-qt/bitcoind.
Outside the core client codebase, many of the documents and websites created when Litecoin was launched remain untouched, display incorrect information, or have disappeared completely though a number of new sites and services have appeared in recent weeks.
Service Availability
While Litecoin services such as a block explorer, historical charts, and an Instawallet-like web wallet do exist, there are a number of important services that are not yet available. There is no client-side encrypted web-based wallet comparable to Blockchain.info/wallet or the extensive macroeconomic charts at that same site. Mobile software is also limited to a few mining programs with no mobile wallet or exchange rate monitor apps available. Finally, exchange volume is highly centralized on the BTC-e exchange and there is no payment processor that provides any functionality similar to Bit-Pay or Coinbase.
Conclusion
This report has provided information on the Litecoin peer to peer Internet currency and will likely be obsolete within hours of its release in many of the figures quoted. The reader is encouraged to retrieve updated information from the sources included in the report as they will undoubtedly affect any decision on whether to support Litecoin.
submitted by dsterry to litecoin [link] [comments]

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