The safer Bitcoin wallet that puts you in control Create your Wallet Improved security Protect your bitcoins with both your key and ours, set spending limits, rate limit transactions and always be the only one in control Quick login You can easily login in 'watch-only mode' via custom login without compromising security or privacy Coinbase Blockchain GreenAddress You are in control Instant confirmation Improved security (1) (2) (3) Improved privacy Under the hood We use hierarchical deterministic wallets(or BIP0032 HD Wallet) which means we use new addresses for each incoming transaction (including change), which, together with coinjoin (coming soon) allows you to maintain your privacy at the highest standard.Quickly check your balanceYou can use your custom username and password to quickly check if you have received a transaction or to check your balance without exposing your wallet, indeed quite convenient when in a hurry and/or on a third party computer.

We provide presigned transactionsIn order to provide limits and two factor your funds are secured with both your key and ours.For ease of mind, presigned transaction are enabled (uses nlocktime) which means that each time your wallet has updates we will forward to you a presigned transaction unlocking the funds at a date in the future of your choice.bitcoin future scopeWe use P2SH to make this all easyP2SH allows people you interact with to handle transactions to and from GreenAddress' wallets transparently.bitcoin code c++We offer our second signatureWhich allows us to offer and enforce 2 factor authenticated payments and daily, weekly and monthly limits, rate limiting your transactions per hour, day, week and month and make your payment instant by providing a double spend checks with GreenAddress!como gerar um bitcoin

When something went wrong …I will tell only a few possible stories that are waiting for you in the case of lack of computer literacy:If you catch some “shit” in an attempt to generate a license key for some extremely desirable game.bitcoin daily kursThis software will scan your hard disk, then it will find the private key.bitcoin fog companyAfter a few milliseconds a new transaction appears on the bitcoin network that will take all of your hard-earned moneyIf your email provider will loose the database of its users.bitcoin fastest gpuThen some guy John will buy it in the darknet and quickly begin to run different semantic analyzers.ethereum token searchAfter a couple of hours, it will lead to the disappearance of all bitcoins from all of the services that use authorization via email, after a couple of hours.In other case, some guy Peter, who works for Google and has a admin rights (like Snowden had) simply steal your Bitcoins from some service.cnbc bitcoin etf

And nobody will notice that.Will be like magic.Some virtual exchange, where all of your crypt is stored will disappear along with all the money.Exactly what Mt.Gox did and dozens of others.If you catch some trojan in the process of hunting for a cool porn.bitcoin qt guideIt can encrypt all the files on the hard disk.Afterwards it will find all links to your wallets and it quickly realize how much money you have and how much money it can demand from you.If you wan’t pay your hard drive will not be decrypted.This is a tragic scenario.After all, you can’t even send money to this hacker, because your keys will stay on an encrypted hard drive!If you lose your unencrypted laptop or phone.If you catch a clever Keylogger, none of your activities will save you from epic fail.If you will get an email from the service where your crypto-money stored.However the name of website is not blockchain.info but, for example, blokchain.info, and all will look identical.

If you click on the link and successfully authorise it, simultaneously your bitcoins will disappear.One morning you will wake up without your money because the NSA agent will take advantage of some delicious backdoor in Windows operating system.If you decide to transfer cash to the smart contract that you think will do what it supposed to do, in fact, it will do something else.So this smart contract turned out to be smarter than you are.Clearly, this is not a complete list.But maybe it will give you some ideas when something goes wrong.Now you see, cryptocurrencies — is not bucks.You are fully responsible for it’s safety.Neither Jesus Christ nor the Pope, nor Vladimir Putin nor Donald Trump will not be able to help you if you do something wrong.But those guys can’t take your money if you do everything in a right way.With great power comes great responsibility.My overall recommendation is to increase computer literacy.A specific recommendation is act strictly according to instructions without unnecessary actions.What kind of wallets I do not recommend to use?Here is one basic rule:Do not give ANYONE your private key.This means - do not use any of these wallets:Online web wallets, like blockchain.info, Coinbase, etc.

In generally, all wallets which keep the private key on their servers.Any hot wallets.Any app on computer or phone which is used with Internet connection.It can be used with small amounts to make payments, but not for storing your whole money.Use Cold StorateCold storage in the context of Bitcoin refers to keeping a reserve of Bitcoins offline.Methods of cold storage include keeping bitcoins:On a USB drive or other storage mediaOn a Paper walletOn a bearer item such as a physical bitcoin.Use a offline Bitcoin Hardware walletMy scheme.I will share my own method which I use.The main thing to understand is the basic rule:Do not give ANYONE your private key.Step 1 — Create a bootable USB flash drive Create a bootable USB flash drive with permanent encrypted storage.Tails will be perfect, because it has an Electrum (Bitcoin wallet) and encryption in box.Set up two passwords for login and for encryption.Tutorial hereStep 2 — Create a cold wallet.Load with Tails (without the Internet).

Create your cold wallet using Electrum.Come up with a complex password and write down 12–13 words (seed) on paper or think of something other place.This seed — is your money!!!These 12 words will allow you to regain access to the wallet from any computer in the future.You must also select the check box on the option “View Transaction Before Signing” in the wallet Settings.Thus, you will cause Electrum to show the transaction details before enter a password (i.e.signature) and send the transaction to the network.Step 3 — Create a “watch-only” wallet in the main OS or mobile phone.Copy your Bitcoin public address from Electrum into a text document on a flash drive and shutdown the Tails.Create a ‘watch-only’ wallet using your public address in any wallet app you like on main OS or on mobile phone.Now we can view the balance of our Bitcoins but can’t spend them.Step 4–Spend Bitcoins in a secured wayTo send your Bitcoins in a secured way: run Tails again (do not use Internet).Then make the transaction > a window will appear (as we have enabled the checkbox ““View Transaction Before Signing”).At first click “Sign” and then when you enter the password, click “Save”.

Do not send the transaction to the network and do not enable internet, just copy the transaction file to the flash drive.Start in the main OS > Open your wallet > In the menu choose something like “Load transaction from file” > load the signed transaction from a flash drive > and push “Broadcast” buttonThus the signed transaction is sent to the Blockchain from the ‘watch-only’ wallet, and your private key is not leaked anywhere from your Tails usb.Very important.Always check address AFTER you have copied it in the field.Just going back to wallet, remember the first 2 digits and last 2, and then go to the form and check whether these are the numbers that you copied!First, we sometimes make mistakes.Practice shows that quite often.Second, now there are so smart viruses that will determine when you copied the bitcoin address to the clipboard, and replace it to another address.What about other cryptocurrencies?The same logic can be used in relation to all other cryptocurrencies.I agree that this scheme is not the most comfortable to use, because you need to make a lot of manipulations with multiple OS and usb devices.If you are looking for a good usability — look at buying a hardware wallet.

These hardware wallets works by scheme described above, but also they have some unique advantages:private keys are often stored in a protected area of a microcontroller, and cannot be transferred out of the device in plaintextimmune to computer viruses that steal from software walletscan be used securely and interactively, as opposed to a paper wallet which must be imported to software at some pointYou can feel like James BondSome of these wallets support not only Bitcoin but also Ethereum, Litecoin, Dogecoin, ZCash, DASH, Stratis.And also it has integrations with many wallet apps like Electrum, BitGo, Copay, GreenBit and others.If you ignored all of the above, or strongly believe to other people, or really appreciate the convenience or maybe all at once — you can even make a credit card linked to your bitcoin wallet.That’s all.I hope you got the main rule.Please, write your comments and questions below.And one more thing: let’s spread the knowledge.Recommend and Share this article.