31

As the operator of the site I will try and answer the first question. Server Side The site currently runs on 4 dedicated servers, hosted in a locked cabinet. All servers run behind a dedicated cisco security appliance with intrusion detection. On the servers themselves various "booby traps" are set to alert the webmaster if an intrusion is detected. The ...


12

Accuracy not guaranteed Blockchain.info Wallets are json files. The json file is encrypted using AES (crypto-js) before the browsers asks that it be stored on the server. The wallet file is embedded in the login page as a html data attribute, the browser decrypts the file with the provided password and extracts a list of private keys and addresses. The ...


9

If you are missing the first word and you know the rest of the 11 words, there are 2048 possible mnemonics but only ~128 of them are valid. Using Python and this library you can print all the valid ones with this simple script: from btctools.HD import check, WORDS phrase = "{x} decrease enjoy credit fold prepare school midnight flower wrong false already" ...


7

Try using bitwasp. It seems to provide a lot of features you need. Try it and let us know if it works. https://github.com/Bit-Wasp/BitWasp https://bitcointalk.org/index.php?topic=109223.0


7

If you want to keep your private keys secret (on your phone, that is), I'd recommend Bitcoin Wallet for Android The app also does not imply any trust in single servers, as it manages the block chain on-device.


7

I have recently created a Faucet and an eWallet for the TestNet. It is very basic, but serves its purpose.


6

I'd recommend to read up on Bitcoin to understand what you're doing. Then you can find an overview of wallets on bitcoin.org, but for a quick start, the fastest way to get started is: Desktop (Windows/Mac/Linux) : Electrum or MultiBit Android : Bitcoin Wallet by Andreas Schildbach iOS : Bread Wallet Windows phone : Get an Android phone instead These are ...


6

Mt. Gox operates a hosted (shared) EWallet. That means that the bitcoin address provided to you for making deposits is not your address, it is instead Mt. Gox's address that they will monitor and credit your account for for any coins received at that address. But to withdraw, you are entirely at Mt. Gox's mercy. Their terms of service, shown when you ...


6

Mt Gox is large enough to attract regular hackers. I had my account liquidated recently by a thief. Whereas I think some of their extra security apps might be beneficial (e.g. Yubikey) I thought a $25 investment to protect a $50 account was silly. Now I'm $50 lighter, so maybe it was not as unwarranted as I first thought. Bottom line: Mind your security. My ...


6

I would recommend VirCurEx. You can use it as a wallet or trade between different currencies.


6

I built a dedicated testnet wallet during a weekend hackathon http://testnetwallet.com


5

Great resources here to help you select an individual wallet: https://bitcoin.org/en/choose-your-wallet Truthfully, having your own wallet that works across Windows/Android/Chrome might be on the tricky side for beginners. If you don't mind a web-based wallet where it's controlled by another party, I'd suggest using Coinbase, Xapo, or Circle as the easiest ...


5

The loss refers to a few things, all centered around the simple fact that using an online wallet creates a SPOF (single point of failure). Consider effects on your balance when: Online wallet operator incompetence enables Accidental deletion of private keys for addresses in which your balance is stored. Security vulnerabilities in proprietary code may let ...


5

I tested it by creating a secure wallet on BitGo. They gave a multisig address for deposits. 2/3 of keys are needed to withdraw Bitcoins. BitGo holds one key, you get private key and backup key. You don't need to printed private key to withdraw Bitcoins. the passphrase is enough (apparently the key is derived form the passphrase). BitGo cannot do Bitcoin ...


5

If it is a web wallet that holds your private keys, then it is certainly possible that the service is staking your coins for you, but this may or may not be a feature that the developers of the particular web wallet have implemented. It is also possible that the web wallet creators take the stake as a payment for their service, which I hope the service would ...


4

This will be the first site to get under attack by the governments when they start their attack on Bitcoin and you will lose all your deposits. :(


4

Satoshi dice uses the same address bitcoins were sent to send them back. There no wallet that does not permit that, how could you spend coins if at first you cannot receive them. The kind of "wallet" satoshi dice is refering to is like you try to spend bitocoin from a broker service (like Mt.Gox) the address they use is not assured to be yours (and the coin ...


4

BitLotto has the same restrictions and maintains a list of compatible wallets. Currently that list includes: Bitcoin-Qt/bitcoind (client) Electrum (client/server) Armory (client, Bitcoin client dependency) BitcoinJ (Client) MultiBit (Simplified payment verification/SPV client) Blockchain.info (Hybrid EWallet) Blockchain App for Android, iOS (Mobile app ...


4

For large numbers of coins, software wallets (online or desktop), no matter how well designed, are not safe. Online clients aren't safe because the ones that are encrypted your side (like blockchain) might somewhat be susceptible to man-in-the-middle attacks. As Lohoris mentioned, Blockchain uses js verification with Github, requiring both websites to be ...


4

At Justcoin.com, we've used a few different methods over the years: Generate addresses using bitcoind, now called bitcoin core, when we need them. To avoid key loss in the case of storage failure, we use a large key pool. The command is simply getnewaddress. Hierarchical deterministic wallets are much better and we use these for an increasing number of ...


4

Android Lightning Network wallets https://github.com/ACINQ/eclair-mobile https://lightning-wallet.com


3

"AML-compliant" bitcoins are not anonymous/anonymizable by definition since most AML laws require the origin of funds to be traceable to real person, at least for bigger transactions. The "tainted" bitcoins are completely different thing, you should be completely fine accepting them in good faith if you have sender's real life ID. Law does know nothing about ...


3

1 - If you don't want to use third party systems, you will need a server to host bitcoind. 2 - Install Bitcoin-QT. In your data directory, create bitcoin.conf with the following attributes (you will need more if you are trying to connect to bitcoind from outside of localhost): server=1 rpcuser=username rpcpassword=password 3 - Use the Bitcoin API to ...


3

It seems to be a good approach. The fundamental is keep a little bit "hot" to high liquidity and keep the rest into USB stickers + papers and if possible keep it safe in a vault or bank. Also, keep the anonymity and security of who has the access to the Bitcoins. Remember: Bitcoin is real money, and if you are working with a lot of money, it can be dangerous,...


3

Use Send Custom for full control over fees. Click Send Money tab, then on the left menu under Transaction Type click Custom. This URL might get you there. https://blockchain.info/wallet/login#send-custom


3

As someone that has implemented a small eWallet, I suppose I can answer this question from my perspective. An implementation of an eWallet is fairly simple. Using the official API makes everything come down to issuing correct JSON RPC calls. You generally have a bitcoind instance running on a server, along with your website front. The main problem is making ...


3

This is a project I discovered to be quite effective at evaluating the privacy provided by each wallet. Obviously in most cases, choosing a wallet is based on a trade-off between privacy/security and convenience and I found this particular repository to be useful at considering various aspects of a wallet. Open Bitcoin Privacy Project Various well-known ...


3

MtGox can disappear temporarily or permanently and take all your e-wallet bitcoins with it. Mt. Gox has been severely hacked, with a massive reserve of its bitcoins stolen. ... a massive hack that has stolen as many as 744,000 bitcoins, fully 6% of all bitcoins in existence. ... "MtGox can go bankrupt at any moment". Forbes 2/25/2014 I don't know of ...


3

Personally I would recommend Electrum, it's a local wallet, doesn't require you to download the entire blockchain, has good features with regards to recoverability and accessibility. Also you can run it in multiple locations at the same time (something the standard bitcoin wallet doesn't allow you to do), and you can also run it on your phone provided it's ...


3

No, Instawallet is a hosted (shared) EWallet. They do not provide to you the private key for the deposit addresses associated with your Instawallet. When you request a withdrawal, Instawallet processes that request and makes the transaction. There is no way for you to create a withdrawal transaction yourself for any funds in an Instawallet.


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