How would you like to design a bitcoin banknote?

[pazor]

bitcoin does not need a printed banknote !

e-currency need only electric power

 


btw:
nice drawings!

[1714777816]

1714777816

[1714777816]

1714777816

[casascius]

My note generator for C# does encrypted notes. This would be safer to carry as a 50 BTC note.

[jl2035]

bitcoin does not need a printed banknote !

e-currency need only electric power

 

I agree but they are very good for the permanent storage so they have a point.

I think phisical bitcoins shouldn't be standardized. There can be many variations, the only important thing is how the private key is handled.

[salfter]

They're absolutely beautiful, thank you so much! tip sent

Thanks!

I'm thinking, besides handing out quarter bitcoin notes to people, I'd like to keep a larger note in my wallet, like say a 50btc. The idea is to hopefully spark the idea in people's minds that bitcoin isn't just "play" money. A 50 btc bill is 500 euros, if people can "get" emotionally that this is as real as it gets, that would be a big step forward. The drawback is I wouldn't normally carry a 500 euro bill in my wallet though, so I'm a little ambivalent about the idea.

Is there such a thing as a €500 note?  The largest denomination produced here is $100 (mirrored in my collection by the BTC10 note), though denominations up to $10k have circulated in the past:

http://en.wikipedia.org/wiki/Large_denominations_of_United_States_currency

None of this is to say we couldn't make large-denomination Bitcoin notes, of course. 

Edit: I just noticed, you edited the slightly more saturated ones, I was hoping to use the more subdued colors...any chance you could add the gold B to the more subdued ones please? thanks

I've taken the other colors I've done in the past and given them the same treatment; they're uploaded to Dropbox at the link given earlier.

[Richy_T]

How about some odd values like 3.14159 btc? Or 4.20 for those silk-road purchases

[Ignore@YourPeril]

Actually, I deliberately designed my 1 BTC coin to be generic enough that others could use it.  It does not say Casascius on it, even though it could.  The only coins I make where I put Casascius on the metal itself are the silver and gold (Casascius is embedded in the binary on the back of the silver, and on the front of the gold).

I was thinking of having all of the business part of the coin on the hologram side. This would not only make them easy to reuse, but also open some precious space for advertising on the all metal side (A circulating bitcoin-bill would lend itself very well to be financed this way). The future designated ad-space would naturally first be used for artwork on coins intended for gifting.

[Ignore@YourPeril]

I think phisical bitcoins shouldn't be standardized. There can be many variations, the only important thing is how the private key is handled.

In a situation of hyperinflation of the official currency you will find that goods like cigarettes and brandy naturally are promoted as a replacement. A uniformly designed physical unit, recognized by the public as a container of bitcoin, could easily also be put into circulation in a crisis (and is way superior as a currency)

[Tacticat]

I was wondering something:

Any chance we can use Encrypted QR codes, so that only people who know the passphrase can use the note?

Would it be difficult to implement that into current Bitcoin Smartphone applications? I mean, the scanning and decrypting.

[casascius]

I was wondering something:

Any chance we can use Encrypted QR codes, so that only people who know the passphrase can use the note?

Would it be difficult to implement that into current Bitcoin Smartphone applications? I mean, the scanning and decrypting.

I of course would second this: the relevant technical information is at https://en.bitcoin.it/wiki/BIP_0038

[phelix]

My note generator for C# does encrypted notes. This would be safer to carry as a 50 BTC note.

this would be an awesome option but I guess the encrypted ones are much more difficult to redeem?

[casascius]

My note generator for C# does encrypted notes. This would be safer to carry as a 50 BTC note.

this would be an awesome option but I guess the encrypted ones are much more difficult to redeem?

Until more people implement BIP 38, the only way to redeem my notes is to use my generator app to decrypt it into an unencrypted private key.  Other than that limitation, and assuming you're able to run my app, it's not all that difficult.  I have recently added a "decrypt key" screen on the tools menu so it's easier to figure out what to do.

I have faith though... when I started making physical bitcoins, I was speaking along the same lines... telling people they had to use a patched copy of bitcoind in order to redeem private keys of any kind, encrypted or not.  Nowadays, there's at least half a dozen good places you can redeem them.  My canvassing works... eventually.

[K1773R]

My note generator for C# does encrypted notes. This would be safer to carry as a 50 BTC note.

this would be an awesome option but I guess the encrypted ones are much more difficult to redeem?

Until more people implement BIP 38, the only way to redeem my notes is to use my generator app to decrypt it into an unencrypted private key.

You should implement a C library for BIP 38 since such a library can be used in any language. therefore it would be much easier to implement and would therefore push products/development.

[casascius]

You should implement a C library for BIP 38 since such a library can be used in any language. therefore it would be much easier to implement and would therefore push products/development.

The friction isn't so much in the difference between C and C#, but rather, in getting equivalent crypto functionality in the other languages.  If the core of BIP 38 is scrypt, one would be better off using a native implementation of scrypt in the target language, rather than making any attempt to port the one in mine.  The  reference implementation of scrypt itself, as I understand it, is already C, but the implementation that might have the most practical value (besides C) would be one written in javascript.

[Tacticat]

This is why I would love to see BIP 0038 implemented.

PROOF OF CONCEPT: Ignore shitty perspective and other details



In a real case I would probably place the Spend code, together with the written encrypted key on the back. But it's only to show that Paper wallets can also be Plastic Wallets!

[K1773R]

This is why I would love to see BIP 0038 implemented.

PROOF OF CONCEPT: Ignore shitty perspective and other details



In a real case I would probably place the Spend code, together with the written encrypted key on the back. But it's only to show that Paper wallets can also be Plastic Wallets!

2. Wrong! Use a chip who signs the transaction internal.

[Tacticat]

This is why I would love to see BIP 0038 implemented.

PROOF OF CONCEPT: Ignore shitty perspective and other details



In a real case I would probably place the Spend code, together with the written encrypted key on the back. But it's only to show that Paper wallets can also be Plastic Wallets!

2. Wrong! Use a chip who signs the transaction internal.

It's just a cheap way for a discardable plastic / cardboard /paper card. Just print your card on a piece of paper or plastic and keep switching cards or keys as much as you want.

It is supposed to be an in-between a real debit card and a paper note, for those of us who can't manufacture or buy or own chipped cards. Something more tangible and durable than paper, easy to store in a real wallet.

[ercolinux]

This is why I would love to see BIP 0038 implemented.

PROOF OF CONCEPT: Ignore shitty perspective and other details



In a real case I would probably place the Spend code, together with the written encrypted key on the back. But it's only to show that Paper wallets can also be Plastic Wallets!

2. Wrong! Use a chip who signs the transaction internal.

Cards with chips will cost more, and requires expensive readers to works while qrcode can be decoded by a smartphone or a barcode reader.

[Red Emerald]

I'm interested in business card sized designs.  Then we can print more per page.  It's also easy to buy paper that is already perforated for business cards.

[odolvlobo]

Here is something similar to the card/business card form factor idea: http://www.paymyaddress.com/

[kangasbros]

Wrote a blog post about paper wallets: http://localbitcoins.blogspot.fi/2012/11/start-your-own-money-press.html

What do you mean "Printer manufacturers are controlled by reptilians"? Is it actually insecure to print something sensitive, then connect the printer to an internet-connected machine? Even when power cycling it?

Joke, I myself believe that method to be safe. But some people are always commenting about the issues with printers (closed source etc).