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Questions tagged [qrcode]

A kind of two-dimensional barcode that can be scanned by many smartphones. They can be used to encode URLs or Bitcoin addresses.

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16 votes
1 answer

Given a private key, how do you get a public address [duplicate]

Possible Duplicate: How are public & private keys in an address created? I am scanning in a private key from a QR code in an app I am writting to handle the import of physical bitcoins. ...
RobKohr's user avatar
  • 622
11 votes
7 answers

What additional benefits can QR codes bring to Bitcoin applications beyond payment requests?

Anyone who has recently used one of the Bitcoin wallets on a mobile device (and some desktop clients) will have seen a Bitcoin QR code. Clearly, QR codes allow for a succinct method for transferring ...
Gary's user avatar
  • 7,593
5 votes
4 answers

Bitcoin QR codes: raw address or Bitcoin URI scheme

I am the author of bitcoinaddress.js library and I am wondering what's the best content for Bitcoin QR codes. What Bitcoin QR codes should contain (for mobile wallet apps and other barcode scanners): ...
Mikko Ohtamaa's user avatar
2 votes
3 answers

How can I securely create a QR code from a bitcoin address?

My Problem I am trying to generate a QR code for a public bitcoin address, preferably using command-line tools. The process poses a security risk because malicious software can generate a QR code that ...
Adam Matan's user avatar
0 votes
0 answers

If I scanned my QR Code once with my android phone from a paper wallet, but now it wont..Why

I can no longer scan QR code from my paper wallet that I purchased from kiosk atm machine. I was able to scan it once, now the paper wallet has smears, rubbed off sections, etc. The kiosk machine's ...
Jenniffer Baskin's user avatar