Bitcoin and Ethereum wallets are normally encrypted by you, the wallet owner.However, sometimes you forget or misplace your wallet password.This is a bad thing!Unless the password is recovered, you have no way to access any funds stored in that wallet.That money is lost forever.At today’s exchange rate, that might be a lot of money.Hopefully we can help you.We have created a service that can take your wallet information, your best guess at your remembered password/passphrase, and attempt a brute force decryption of your wallet.If you have no idea at all of your password, and it was more than a handful of characters long, then it is unlikely that we can help you.No-one in the world, including the NSA, CIA, D-Wave or anyone else can crack the encryption used in the Bitcoin or Ethereum wallet if the password is more than 15 fairly random characters.The wallet encryption is strong by design.There are no known flaws in the implementations, and many people have tried to break them!

However… do not despair… maybe your password wasn’t as secure as you thought, or maybe it was completely different from what you remember?If, however, you have a vague idea of your password, but can’t quite remember it… Then we can help you.We have created a highly optimized multi-threaded C++ program to perform the brute-force decryption.This service is designed right from the start to be a scalable solution - it runs on a cluster of high performance Linux boxes, hosted on the Amazon EC2 cloud.This enables us to scale up to nearly any number of computing cores.We have tested this with up to 100 8-core computers, but more can be brought online if required.Some of the wallet encryption formats are suitable for solving on GPU (video card) hardware.In these instances, we have hand-crafted highly optimized GPU software to provide huge speed advantages.The algorithms used to generate the password permutations are proprietary, but are designed to be flexible in order to handle unusual requirements.

The encryption used by the Bitcoin-core wallets is much harder to break than most encryption schemes.A technique known as ‘key hardening’ is utilized, so that it takes most home computers a full 0.1 seconds to check just one password for correctness.This is why an optimized, distributed, specialized program is required to attempt large numbers of brute force decryption attempts.que es minerar bitcoinWe can decrypt both bitcoin and litecoin wallets, ethereum pre-sale and Mist/Geth/Eth wallets and most of the other altcoin wallets.cex bitcoinDogecoin, Vertcoin, Peercoin, Mastercoin, Quark, Protoshares, Feathercoin, etc).bitcoin current value in inrWe support brain wallets and BIP38 encoded wallets too.The full list is here.Should you trust us with your wallet?

Why won’t we just steal your money?If you send us your wallet, and we decrypt the password, then it would be possible for us to steal the money that the wallet holds.(we won’t, but you can’t be sure of that).Fortunately, the design of the bitcoin-core wallet is such that you can send us just part of the wallet information.The part you send us allows us to decrypt the wallet, without giving us any opportunity to steal your money.See various detailed explanations on the bitcoin wallet design (google them).Refer to the wallets page for more detailed information.(Note that this applies to bitcoin-qt/bitcoind/litecoin/dogecoin and most other alt-coin wallets, but does not apply to blockchain.info or multibit or armory or electrum or BIP38 encoded wallets, nor the Ethereum wallets) We would like to decrypt your wallet to recover your lost Bitcoin funds.We want to do this because it is fun, it helps you, and we see the possibility of a monetary reward for us.You can pay in Bitcoins, Ether or other alt-coins (of course), typically from the funds in the recovered wallet.

Just send us the wallet details, and we’ll try our best to decrypt it.Generally, we ask for a fee of 20% of the value of the wallet, but this is payable ONLY if we succeed in decrypting your wallet and returning your funds to you., and we’ll work something out.If you have forgotten or misplaced your password, send us your wallet (or a subset of your wallet details for bitcoin-core wallets), and your best guess of the remembered wallet password or passphrase.Refer to our contact details for more detailed information.Two days ago “CoinWallet.eu” announced that they were going to do an “Ultimate” Bitcoin stress test, flooding the network with transactions.It looks like they are in fact going ahead with that.Specifically they claimed they would spend 20BTC - about $5kUSD - to create transactions with a fee of 0.1mBTC/KB.That works out to 200MB worth of transactions, which will take some time to be mined.Transaction fees are a supply and demand marketplace.On one side you have the supply - up to 1MB worth of transactions approximately every 10 minutes - and on the other side you have demand - what fee/KB people are willing to bid to get their transactions mined.

With few exceptions essentially all miners use the profit-maximizing algorithm in Bitcoin Core to choose transactions: start with the highest fee/KB transactions, working down to the lowest, stopping when you’re out of transactions or the block is full.Like any market place if you don’t pay a competitive fee your transaction simply won’t get mined until demand subsides.20BTC of fees is a lot of demand, so that might take a few days, or even longer!Like any market place, if demand is sufficiently high prices may never go down, similar to how it might be years, if ever, before you’ll be able to buy 1BTC for $1 again.What’s important is that by paying a competitive fee that outbids other transactions your transactions go to the head of the queue and will get mined immediately, much like how if you want to buy 1BTC right now, if you offer about $250 you’ll get a buyer on an exchange pretty much immediately.Concretely, the fee rate CoinWallet.eu claims they will use is such that an average Bitcoin transaction - 250 to 1000 bytes - needs to spend at least 0.6 to 2.5 cents in fees to outbid the tx flood.

For most transactions this isn’t a big deal, although extremely low-value transactions will be uneconomical.In a perfect world just like any other financial market getting a quote on how much a transaction will cost would be easy.Similar to when you buy bitcoins themselves data on prices would be readily available, such as estimated spot prices, as well as graphs of pending transactions and what fees they’re bidding.Because blocks are found in a random Poisson process it’s a little different from a standard market place - orders aren’t filled instantly - but the basic principles are pretty similar.When you send a transaction your wallet would have a threshold value for what level of fee you don’t care about - “if the fee costs less than 10 cents, don’t ask me for confirmation, just send it”.In cases where getting into the next block would cost more than your threshold setting, your wallet would let you know and give you an estimate for how long you might have to wait at various fee levels; because blocks are created randomly, fees have a certain probability of going down due to a bunch of blocks getting created in a row.

Equally, sometimes your original bid might be too low, perhaps because of an unexpected increase in demand, or miners having bad luck at finding blocks.In that case you’d have the option of resending your transaction with a higher fee to get back to the front of the queue.Even really basic things aren’t done right.For instance even though the fee/KB is the basis by which all miners evaluate what transactions to mine first, I don’t know of any block explorers that show the fee/KB for you - you have to calculate it yourself.Similarly, even though not all transactions are the same size most wallet software sets fixed fees, resulting in inconsistent fee/KB rates paid.Even worse, a lot of wallets give you few options with regard to what fee to pay, or even no options at all.This is not unlike having a self-driving car that could fill up at the gas station all by itself, yet regardless of how empty the tank was or what the current state of middle east politics was, always tried to pay the same amount of money.

If the gas station was unwilling to accept your price the car would just sit there for a few days or weeks until middle east politics improved, refusing to even let you get out your wallet and pay a few extra dollars.As for the information side of things, even basic stuff like websites with some charts of the minimum and average fees paid by transactions in blocks pretty much don’t exist right now.There’s lots of pretty graphs available of things like the number of transactions per block, or total transaction fees paid, but none of this stuff tells you what you actually care about: What fee/KB do I need to pay to get my transaction mined?Not only does our fancy self-driving car refuse to let us pay for gas, but no-one will tell you how much it actually costs anyway.Statistics for how many barrels of oil per day are consumed and how many cuddly marmots in wildlife refuges were killed extracting it are readily available, but the data you actually care about, how much did people pay for the stuff, just isn’t available.

I’d go on and talk about how the abiogenic petroleum crowd is going around trying to convince us that we’re all floating on an endless sea of underground hydrocarbons and gas should be free to all… but that’s enough for now.As of v0.10.0 Bitcoin Core estimates fees for you based on the supply and demand observed on the network.By default it tries to pay a sufficiently large fee to get into the next block, so as demand increases it pays higher fees to compensate.As of v0.93.2 released June 10th 2015 by default Armory uses Bitcoin Core’s estimatefees RPC to estimate fees.As with Bitcoin Core, your transactions should go through with no issues.Fees are set for you based on floating estimates, within a pre-defined sanity range.Fees are paid automatically for you based on floating estimates.They don’t give any details on how this works, other than saying that “Coinkite will calculate the optimum fee for you and we even handle the payment of that fee, to ensure timely processing of all your transactions.” “Coinbase pays the miner fees (typically 0.0002 BTC) on external transactions in order to ensure these transactions propagate throughout the bitcoin network quickly.” All these wallets, and many others, at least allow you to set fees in some way, e.g.

via a slider with some pre-defined “economic/normal/priority” settings, or by entering exactly what fee you want.The simplest thing to do for now is set a fee 0.2mBTC/KB or higher to be sure to outbid the CoinWallet flood.If your initial bid for blockchain space was too low and you’re transaction isn’t getting mined - in other words getting outbid - unfortunately there’s no easy answers right now.No wallets currently support an explicit way to increase a transaction fee after the fact; you can try to make use of Luke-Jr’s child-pays-for-parent patch - supported by a number of miners - to increase the transactions fee by respending the output, but that’s usually tricky as most wallets don’t give you that kind of control.tl;dr: Until wallets improve you’re probably going to just have to wait.:( If you’re feeling really adventurous and are using Bitcoin Core you can make use of first-seen-safe replace-by-fee, which F2Pool recently enabled.(credit goes to F2Pool themselves, as well as Marshall Long of FinalHash his big role in convincing them to adopt it) To do this you’ll need to compile and run a Bitcoin Core node with the RBF patch.

The patch automatically finds other RBF nodes and connects to them in addition to normal Bitcoin Core nodes; you can verify this by running the RPC command: bitcoin-cli getpeerinfo | grep 0000000004000001 If this returns a bunch of lines like the following, you’re connected to other RBF nodes: Next get my replace-by-fee-tools and use the bump-fee.py script to actually increase the fee on your transaction.It has two modes: full-RBF and first-seen-safe RBF.F2Pool supports the latter, so we’ll be using the -s switch to enable the first-seen-safe rules: $ ./bump-fee.py -vs cc056c60beee1a9bc05fcc0537cedf1755ce4b0cfb54c5a166aafc24a35ac3d8 DEBUG:root:First-seen-safe enabled: will not reduce change txout value below 0.01127058 BTC DEBUG:root:Old size: 0.521 KB, Old fees: 0.00000522, 0.00001001 BTC/KB, Desired fees: 0.00010019 BTC/KB DEBUG:root:Delta fee: 0.00004698 DEBUG:root:Adding new input 8e172a2f46a4ba99b957e523c398233a357ea997ff5880db89d2a7726584ff3a:0 with value 0.00301824 BTC DEBUG:root:Delta fee: 0.00006171 DEBUG:root:New size: 0.668 KB, New fees: 0.00006693, 0.00010019 BTC/KB DEBUG:root:Sending tx da3ccefb7b9dd1cd9a157cd7e210ead76c5f0bd48fe175bc1be00937e4ae9ab8 Basically we took transaction cc056c60, added an extra input to it, and increased the value of the change address such that the new fee/KB was 10x greater, producing a second transaction da3ccefb.

RBF supporting nodes see that tx2 pays more fees than tx1, so they relay it across the network.When it gets to RBF supporting miners they accept it into their mempools too, and with any luck the extra fees are enough to get bumped to the head of the queue.That said, be warned: ./bump-fee.py hasn’t been tested much, so don’t use it on a wallet whose funds you can’t afford to lose.Transaction fees aren’t going away, blocksize increase or not.CoinWallet.eu is only spending $5k flooding the network; even an 8MB blocksize increase can only raise the cost of that attack to $40k, which is still very affordable.For instance an attacker looking to manipulate the Bitcoin price could probably afford to spend $40k doing it with the right trading strategy; let alone governments, banks, big businesses, criminal enterprises, etc. to whom $40k is chump-change.Wallets need to become smarter about fees, as does the rest of the Bitcoin community.What we need to do: Add fee/KB displays to block explorers.