Hello.
I thought of an interesting idea.  If a person were to encrypt a wallet and print the encrypted data as a barcode, this could work like a money order, but more secure.  The encrypted wallet could be mailed and the encryption key could be given over the phone, through an email, through the website in which you have placed your order, or simply be memorized and given in person.  This could also allow a person to carry paper Bitcoin money with little chance of the money being stolen even if robbed.  This would also prevent someone with a camera from being able to steal you wallet in barcode form.  This could even make Bitcoin easy to use for people that aren't very computer savvy.  A person could just go to his/her bank and have Bitcoin money printed.

Hi cindy
Thanks for your nice sharing.As QR Code has a wide valid data scope, thus, people often encode a website link into QR Code. Then one can easily visit this website by just scanning the QR code barcode, instead of entering the url in the web browser. Therefore, QR Code has been widely used in the marketing and advertising field as a promotion tool. So i want to know that if you know any free trial from qr code barcode generater.Thanks a lot.

 Problem:

You wish to pay a friend with Bitcoin.
 
You have saved your password for MyBitcoin.com except for the last 3 letters into your mobile phone memory to save time,

 but the Bitcoin address is still very long to type in.

How can this be better?

 Barcodes.

There are 2 sections to this problem:

1) Generate a barcode for a bitcoin address.

2) Read a barcode using a mobile phone camera.

There are apps that can read barcodes (http://scan.jsharkey.org/) but what I'm looking for is one that runs in the background and types in the barcode number into the webbrowser. I haven't found that yet. Here's a starter on how you might make that:

You don't need an Android phone to make an Android app. See this article:
http://news.softpedia.com/news/How-to-Run-Android-Applications-on-Ubuntu-115152.shtml

You can run an emulator on your linux or Windows box straight away, including using a PC connected webcam (see http://scan.jsharkey.org/ )

Somebodies already on the barcode scan API:
http://code.google.com/p/zxing/

It should be a simple feat to use that for copy the results from zxing into the copy/paste buffer for easy copying into the web browser.

2) Making your own Bitcoin address barcode.

Here's the list of barcode types useable with zxing:
    * UPC-A and UPC-E
    * EAN-8 and EAN-13
    * Code 39
    * Code 93
    * Code 128
    * QR Code
    * ITF
    * Codabar
    * RSS-14 (all variants)
    * Data Matrix
    * PDF 417 ('alpha' quality)
    * Aztec ('alpha' quality)

I'm now looking up how to make these....

There are cross platform webcam solutions, although the multi platform part may narrow the usable hardware list. We definitely intent to support webcam interfaces for QR code scanning in the future, so don't despair just yet.

Is there a paper wallet with big QR codes? My Samsung Galaxy S2 can't scan the QR codes of the Bitaddress.org paper wallet and derivative wallets (such as the Dr. Evil one). My iPad can. It suck a bit if I give my relatives a paper wallet and their phone can't scan the QR code because it is too small.

I have two printers, a Canon MP550 inkjet scanner/printer and a Brother HL1250 laser printer. Paper wallets printed with either of them can't be scanned by the Samsung Galaxy S2 with the Android Bitcoin app.

Ok, I have an idea that I figured I would throw out here to see if it would pass muster.

tl;dr  Create an Android app that scans barcodes at stores and allows you to buy instantly in bitcoins and have the products delivered.



Basically I would have a simple website, for merchants and as a gateway for Android users. On the merchant side I would have a list of barcodes scanned by users and have a list of what items are popular along with data on how much money someone could make by selling them. Make it as easy as possible for a newb with a garage to see that he could make X amount of bitcoins selling X widget.

On the consumer side you can go into a store, say you are doing your Christmas shopping, you see an item you like, you scan the barcode and either enter the store price for comparison or not. It would have the item name, a rating for the seller, a sliding bar for price based on how many days you are willing to wait to receive the item, and a "Buy" or "Don't Buy" option at the bottom. If you buy, the item is added to your bit-pay cart. You can then go throughout the store adding more items to your BTC cart until you have everything you need, then you just checkout and send in your payment. Walk out of the store with no bags and your shopping done.

Ideally, on the merchant side, if this were to take off you would have small start-ups all over the country selling goods for bitcoins which would then turn into huge warehouses of goods to the point where Walmart will start losing market share to people just coming in to scan products for their bitcoin purchases.

Ideally, on the consumer side, you would be able to get all of the items you want at a store at a lower price with the ability to pay in bitcoins. With the convenience of having it all delivered to you at your front door.

Thoughts? Ideas?

I could probably code up a basic prototype.