I have tried several QR decoders that are free on the internet and none seem to be able to read the images or cropped images. Has anyone been able to decode these QR images?
+1, QR decoder libraries
Topic: Printing bitcoins, an implementation - page 5. (Read 17784 times)
+1, QR decoder libraries
I have tried several QR decoders that are free on the internet and none seem to be able to read the images or cropped images. Has anyone been able to decode these QR images?
+1, QR decoder libraries
I have tried several QR decoders that are free on the internet and none seem to be able to read the images or cropped images. Has anyone been able to decode these QR images?
How does one convert those paper bitcoins back to electronic ones?
EDIT: Just found this thread. Seems complicated.
EDIT: Just found this thread. Seems complicated.
(The notes above are real. The first person to take them gets them.)
user Hal organized a similar quest on weekend
his was a bit more complicated (he provided us with a base58 encoded pvt key and for the first round with an invalid key : )))
at least 2 people have a valid implementation for spending transactions based on private key
if they find out, they might claim your bitcoins instantly by reusing what they wrote for the Hal challenge.
So how should I use this without the according public key? I like this idea though. You could use that as a physical backup if combined with the public key.
The public key is derived from the private key.
So how should I use this without the according public key? I like this idea though. You could use that as a physical backup if combined with the public key.
There has been much talk about printing bitcoins. Here is a program to do it.
http://bitcoin.modernjob.info/print.html
It takes a wallet.dat file and generates PDF and EPS bitcoin cheques looking like this:
Each bitcoin address in the wallet with available coins gets a note containing the amount and the private key that controls it, both human readable and in QR Code.
(The notes above are real. The first person to take them gets them.)
Edit: PDF / EPS link.
http://bitcoin.modernjob.info/print.html
It takes a wallet.dat file and generates PDF and EPS bitcoin cheques looking like this:
Each bitcoin address in the wallet with available coins gets a note containing the amount and the private key that controls it, both human readable and in QR Code.
(The notes above are real. The first person to take them gets them.)
Edit: PDF / EPS link.
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