Bitcoin QR Code Generator Click a QR code to upload it to Imgur.Find out more about Bitcoin.Bitcoin address: Size (px): Fork me on GithubOne of the most popular options for keeping your bitcoins safe is something called a paper wallet.Here we explain how to transfer all those digital coins into a physical paper form using just a printer.Note that in this guide we’ll be talking about bitcoin.However, the basic concepts apply to any other cryptocurrency; for example, litecoin.A bitcoin wallet consists of two ‘keys’.The one you’ll already likely be familiar with is the public key, which is your wallet address and is how other people send bitcoins to you.The other part of your bitcoin wallet is the private key.It is this that enables you to send bitcoins to other people.The combination of the recipient’s public key and your private key is what makes a cryptocurrency transaction possible.It is important to understand that, if anyone else obtains the private key of your wallet, they can withdraw your funds – this is why it’s absolutely essential that nobody else discovers it.

So, if you keep your coins in either an online wallet, or a hard-drive-based software wallet, you are vulnerable to attacks by hackers or malware that can log your keystrokes.Furthermore, a stolen PC or a hard-drive crash could also see you waving bye-bye to your digital treasure.ethereum miner programUsed with care, a paper wallet can protect you from these possibilities.bitcoin exchange mountA paper wallet is a document that contains copies of the public and private keys that make up a wallet.bitcoin on linux mintOften it will have QR codes, so that you can quickly scan them and add the keys into a software wallet to make a transaction.litecoin total blocks

The benefit of a paper wallet is that the keys are not stored digitally anywhere, and are therefore not subject to cyber-attacks or hardware failures.The disadvantage of a paper wallet is that paper and ink can degrade, and paper is relatively fragile – it’s definitely worth keeping well away from fire and water for obvious reasons.vodka for bitcoinFurthermore, if you lose a paper wallet, you’ll never be able to access the bitcoins sent to its address.litecoin first blockHere are 10 steps needed to create a paper wallet: For users of the Blockchain.info website, there is also a basic paper wallet option too.Click on the ‘Import/Export’ option, and look for the ‘Paper wallet’ link on the left-hand menu.This website offers a tamper-resistant design of paper wallet.It is also possible to order holographic labels to demonstrate that the wallet hasn’t been tampered with.

It also supplies a live-boot Ubuntu CD with paper-wallet software pre-installed.Given the implications and risks of storing large amounts of money, you may want to take serious precautions for how to go about creating your paper wallet and storing it afterwards.Tips for keeping your paper wallet safe If you want to create a paper wallet for a lesser-used currency that doesn’t have an address generator website, there is still a way to achieve this.What every alt-currency does have is a variation of the Bitcoin-Qt wallet application.The console will then display the private key of that wallet.You then have the public and private keys of the wallet.You can print these ‘as is’, or you can opt to generate QR codes to print.However, the wallet details will still exist in your computer.The only way to remove them it is to open your file explorer in the ‘C:\Users\[YourUsername]\AppData\Roaming\[Wallet App Name]\’ folder and delete the ‘wallet.dat’ file.NOTE: this will remove all addresses held in the software wallet, and you should make sure that there are no funds remaining in the other addresses you will be deleting.

Now you should be the proud owner of an unhackable paper wallet for your digital currency.If a paper wallet is not for you, however, you could use your own mind with a brain wallet.For more options, please see our guide to storing bitcoin.Wallet, lock icons and printer images via Shutterstock_ Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top up vote 5 down vote favorite 2 What are QR codes ?How do you use the QR code for payment function on the wallet ?When would you use it ?transactions wallet qrcode up vote 4 down vote When using bitcoin to pay at the point-of-sale or for a face-to-face transaction, there is the problem of how to communicate the Bitcoin address to be paid in a way that the person paying can use.A bitcoin address is just data, but it is between 27 and 34 characters so that is way to much info to expect the person paying to have to manually type in.

A QR code can easily represent this amount of data in a machine-readable manner and do so reliably.The QR code can contain other information as well -- such as an amount and a message and other fields as well -- thanks to a URI scheme for Bitcoin.So with a mobile, a convenient way to pass that data is for the payment recipient (e.g., a merchant) to display a QR code with the Bitcoin address for the transaction, and then for the person paying to scan that QR code to obtain the bitcoin address.A mobile app called Barcode scanner from ZXing is the most widely used app on Android for this.If you are paying using the Blockchain for Android mobile app, then that app will let you touch the QR code button to launch the Barcode scanner app.When the scan is complete, the Bitcoin address field (and amount field if the QR code contained the amount) will then be populated with the data from the QR code.The person paying then hits send and the bitcoin transaction gets created and broadcasted by the mobile app.

) can use a QR code as well, except the user may need manually do a paste of the clipboard contents after scanning.The merchant or trader might use the same mobile app (e.g., Blockchain for Android) which has a built-in method to create and display the QR code for the customer to send payment to which occurs in just one step.Many clients (including Bitcoin-Qt), EWallets and payment processors such as BitPay and WalletBit will show a QR code (or a method to get the QR code displayed) for receiving payment.For those wishing to create a QR code manually can do so using a web-based service such as Wolfram Alpha or several other methods.This does introduce a vulnerability however in that the provider of the QR code could detect that this is a Bitcoin address and maliciously interject another address that the provider controls -- thus directing the consumer to pay the wrong address.So using only a trustworthy source to generate the QR codes is recommended.up vote 3 down vote Nowadays pretty much every device has a camera built in so it is much easier to scan the QR code rather than typing very long Bitcoin account address.

If you have wallet in your mobile phone and you want to send money to someone he can email you the QR code and you will be able to scan it quickly with your phone and send the money.Without that you would have to type in on your phone the whole Bitcoin address.The same goes to receiving Bitcoins, you can easily send QR code to someone.If you make face to face transactions with Bitcoin you can exchange Bitcoin addresses just in few seconds, without typing./ or http://goqr.me/, after generating the code you can save it as a JPG file, print it and keep it in your wallet or even order a custom t-shirt so people can donate you some Bitcoins in the shopping centre just by pointing their cameras at you :D up vote 3 down vote As of November 2013, Bitcoin-qt generates a QR code.Click the Addresses button at the top of the window, highlight the wallet address you want, and then click the "Show QR Code" button at the bottom of the window.Add a message, if you want, or not, and then click the "Save As" button.