Topic: How would you like to design a bitcoin banknote? - page 18. (Read 94792 times)

+1

I haven't read the whole thread, so maybe someone else already suggested this: don't be limited to paper only in the designs. Banknotes could also be printed on transparency film.

That way, QR-codes and privkeys can be broken up into grids of small squares and printed twice onto the banknote. One field contains half the squares, the second field the rest. You then need to fold the node so that the two layers create the complete code again. That way, a quick glance at the QR-code or the privkey isn't useful anymore.

Or print on two completely separate sheets. Store one in your safe, the other one somewhere else. You need both of them to redeem the coins then. Or it can be used as some sort of escrow: hand over sheet 1 and after the deal is done sheet 2 too. When the public code is on both, anybody can change the balance, but only when you have both sheets you can redeem it.

Using such plastic would also allow the user to cover the important codes with a paint that is soluble in water. Black paint covering black toner. You have to wipe it off to scan the redeem code for example.

This project, if I understand it correctly, is a "print-your-own Bitcoin banknote".  I don't have a method of applying scratch-off material, and even if I did I would not want someone else figuring out how to defeat this defense without it being obvious my scratch-off layer had been tampered with, and then the notes continue to circulate even though a would-be criminal has begun accumulating the private keys.   I couldn't prove that it wasn't me who was the first to redeem the code and transfer the funds back to myself.

There is one use case, however, that suggests a change that might be useful with these banknotes:

   Space for a custom message.  Like a memo field on a check.

If I am giving these out as a gift, printed on the back of a customer invoice, for instance, I know there will be many of these that will never be redeemed. Since I can keep a copy of the keys, I could reclaim any funds that were not redeemed after a certain expiration date.  A memo field would allow me to print a "Redeem by: " date or other way to explain expiry.

Perhaps it might be more interesting to design a bitcoin checkbook, seeing as banknotes are designed to be reusable by many people and a BTC note with a private key more or less makes it anything but a banknote.

So why not instead a checkbook? Something where each check has the bitcoin private key obscured by some scratch off material like instant win lottery cards, and when you write this check, it tears out of the checkbook leaving a stub where you can keep track of transactions.

The back of the checkbook could contain a list of all the account numbers so you could easily check the balances. Or perhaps the producers of the check book could offer a web app where you can log in to your 'virtual checkbook' to keep track of what balances have been 'cashed'.

I still think the private key should be obscured or covered. Some tamper evident way. This way if the private key is exposed you know it could be worthless.

SVG with text


If you're not seeing the image above you should update your browser.

Direct link to download http://clinicadosom.com/downloads/Bitcoin-note-with-text-small.svg.zip

As usual, tips will be appreciated @ 1EUbpbRV68Rap4JcQFkfxd2urgv9hLy2uu

Cross-posted to http://www.rugatu.com/questions/1833/how-would-you-like-to-design-a-bitcoin-banknote/2095

my design is simple
copy an european note

You can submit your design on our banknote contest and have the chance to win an extra 1.50 btc, or have it tipped by members who appreciate your work  

Hey Mike! People are talking about Server side stuff. I am still available if you want to branch off and create a separate product

I think if someone can make a web app that can take My own Atlas Face and  put it on that bill, we'd have something really cool here

web app makes a pdf. And sells it for 0.001BTC a page

0.1BTC for 100pages

4billsApage* 100pages *0.01BTC funding each

4.1BTC = 40.00$ worth with your face on it!

I would give it away to friends and family

 

Not quite. But thanks.
The lines on the background are still a raster image and so is the equation.
I didn't figure how to paste an object into a layer on the svg, hence the fact that the SVG only has 1 layer with several objects, 2 of them raster images.

Guys, don't forget to show your love to DOCTOR_75R @ 1EUbpbRV68Rap4JcQFkfxd2urgv9hLy2uu

psy you did a decent job on the SVG! Holy Crap!

OK, this is the SVG I managed to create with what I got. Only the text is missing, not because I couldn't do it but because I figured some persons will wish to change it, so the graphics are enough.
Tell me what you think. Gfx is not my thing, so this was the best I could do with what I got. (GIMP/Inkscape)

http://clinicadosom.com/downloads/Bitcoin-note.svg_1.zip

It is also posted alongside the PSD @ http://ocantinhodadama.clinicadosom.com/2012/07/20/bitcoin-note-design-psd-file/

Donations to the designer can be sent to: 1EUbpbRV68Rap4JcQFkfxd2urgv9hLy2uu

Thank you.

just info if someone need a banknote custom sizes for printing
size of a euro banknote
EUR 500. Color: Purple. Size: 160 x 82 x 0.12 mm
EUR 200. Color: Yellow-brown. Size: 153 x 82 x 0.12 mm
EUR 100. Color: Green. Size: 147 x 82 x 0.12 mm
EUR  50. Color: Orange. Size: 140 x 77 x 0.12 mm
EUR  20. Color: Blue. Size: 133 x 72 x 0.12 mm
EUR  10. Color: Red. Size: 127x 67 x 0.12 mm
EUR    5. Color: Grey. Size: 120x 62 x 0.12 mm

size of a dollar banknote
US Dollar Bill is 66.294 mm wide by 155.956 mm long.

+1

This statement is false by definition:  The definition of what is a concern for the purpose of my reward/bounty/contest is purely my choice, which may or may not be arbitrary.  I am the judge, jury, and executioner in that respect.

But just to be clear, my concern was less "this uses too much ink", but rather that the ink cost doesn't add an offsetting artistic value.  The choice that uses the most ink happens to spend that ink on a fractal-based image, which has a high level of visual appeal, invokes the semblance of visual features present in cash, and has good relevance to the discipline of mathematics being referenced here.  I am not asking how many pixels are white, I am asking if the person who prints the note is going to get a good return on his ink investment, as measured in visual appeal.

That said, if you, for example, altered the curves behind Alan Turing's head and changed them to something that uses the ECDSA curve as a theme (discussed and illustrated earlier in the thread - it is a curve with points labeled P and a Q) the appeal will jump up quite a bit.  And there IS a very real demand for an artistic banknote that uses the least possible ink - and you're doing fairly well in that respect with your most recent submission.  If it were feasible, I'd much like a portrait of Turing made out of line art (sort of what's on submission #1), rather than a greyscale photograph.

If you're going to use Alan Turing, I would also add "(1912-1954)" to make clear we are honoring a dead pioneer of some sort, rather than what some might think is the "president" of the "Bitcoin corporation".

The easiest way would be to write in after you print it, like a check, or candidates 2, 3, or 4 for the contest. That's what I had originally intended, but if you want I can create a psd file for you that would have an amount you could edit before printing

EDIT: Oh, the QR code part, unless I'm mistaken, will be part of the solution provided by bitaddress.org- if they don't choose my design, then you can edit one of the PSD files I have provided at http://dropcanvas.com/jfp75

But how it works? If I want to write the amount or to put my QR code I have to edit the PSD file? It doesn't seem easy for everybody.

I assure you your concerns regarding ink usage are unfounded. Here is a detailed analysis showing my image to be the one that uses the least amount of ink compared to all the currently qualified candidates. REPORT HERE: http://i.imgur.com/BjJs0.jpg

Despite this, I have also developed an "Ink Conservative" alternative version of my note, displayed below. While obviously I prefer my colored version, this may be valuable to those working on a limited budget.



PS unclemantis, I have heard and value your opinion, thank you.

Still looking for constructive criticism

Cheers,
rxw

I say scrap it and try a different attack all together.