Bitcoin Forum
December 10, 2016, 03:14:36 AM *
News: To be able to use the next phase of the beta forum software, please ensure that your email address is correct/functional.
 
   Home   Help Search Donate Login Register  
Pages: « 1 2 [3] 4 »  All
  Print  
Author Topic: Physical Bitcoin Check Generator  (Read 7304 times)
error
Hero Member
*****
Offline Offline

Activity: 574



View Profile
February 28, 2011, 02:37:28 AM
 #41

So let's see if I understand it right.

You handle me one of those "checks", I go to some address input its serial # and the site tells me how much is in that "account".
I scan the QR-code containing the PK and that's it.
So if it was already "cashed-out", the serial # will tell me "nill", "zero".

right?
Yessir. That's absolutely correct.

So, in that case, the merchant could deny purchase.

You still have not addressed the fatal flaw here: Merchants will, sooner or later, stop verifying them at point of sale unless there's a technical requirement to do so. They will stop because they will trust the notes, because for a long time they all verify OK. At that point, I come along and pretend to be texting on my Android while I'm really snapping pictures of other people's QR codes and sending the Bitcoins to myself.

Worse, this system practically requires merchants to not only verify them at point of purchase, but to cash them out; otherwise an unscrupulous employee at the till can just take all the QR codes for himself. This is just too risky. I could not imagine accepting these as a merchant as-is.

15UFyv6kfWgq83Pp3yhXPr8rknv9m6581W
1481339676
Hero Member
*
Offline Offline

Posts: 1481339676

View Profile Personal Message (Offline)

Ignore
1481339676
Reply with quote  #2

1481339676
Report to moderator
1481339676
Hero Member
*
Offline Offline

Posts: 1481339676

View Profile Personal Message (Offline)

Ignore
1481339676
Reply with quote  #2

1481339676
Report to moderator
1481339676
Hero Member
*
Offline Offline

Posts: 1481339676

View Profile Personal Message (Offline)

Ignore
1481339676
Reply with quote  #2

1481339676
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1481339676
Hero Member
*
Offline Offline

Posts: 1481339676

View Profile Personal Message (Offline)

Ignore
1481339676
Reply with quote  #2

1481339676
Report to moderator
Anonymous
Guest

February 28, 2011, 02:37:54 AM
 #42

Wait a second, why do you need the public keys on the checks?
You don't. However, I prefer to give people an alternative to scanning the private key. You want to avoid copying the private key as much as possible.
Anonymous
Guest

February 28, 2011, 02:44:21 AM
 #43


You still have not addressed the fatal flaw here: Merchants will, sooner or later, stop verifying them at point of sale unless there's a technical requirement to do so. They will stop because they will trust the notes, because for a long time they all verify OK. At that point, I come along and pretend to be texting on my Android while I'm really snapping pictures of other people's QR codes and sending the Bitcoins to myself.

I don't believe merchants will be naive enough to start trusting them as-is. It simply isn't in the market's best-interest. Your ability to describe such a scenario so quickly simply proves it won't happen.

Why don't you start snapping pictures of people's credit cards then? I wish you luck.

Worse, this system practically requires merchants to not only verify them at point of purchase, but to cash them out; otherwise an unscrupulous employee at the till can just take all the QR codes for himself. This is just too risky. I could not imagine accepting these as a merchant as-is.

Employees have and can steal actual cash. There are systems to prevent this and they will be certainly made if the need arises for my checks. I don't see anything wrong with merchants just cashing them out digitally and destroying the note. It's actually more convenient in the end but still allows the average joe without a fancy smartphone to use Bitcoins anywhere.


Anonymous
Guest

February 28, 2011, 02:46:19 AM
 #44

We can list "what-ifs" all day. What if people mistake these notes for receipts and just throw them away? Honestly. : P

Anyways, I like the questioning-attitude.
error
Hero Member
*****
Offline Offline

Activity: 574



View Profile
February 28, 2011, 02:55:48 AM
 #45

(Quote elided)

You're assuming people will act perfectly in conformance with your protocols, and I am saying that the other six billion of us live in a world where that just isn't going to happen. No human is perfect, except perhaps yourself. Tongue When things go wrong -- and they WILL, despite your protestations -- it's your notes that will take the blame in many people's minds. (Whether that's fair or not is irrelevant.)

What I really don't understand is your apparent unwillingness to consider any security issues with respect to your notes. This really does not inspire confidence.

15UFyv6kfWgq83Pp3yhXPr8rknv9m6581W
Anonymous
Guest

February 28, 2011, 03:00:06 AM
 #46

(Quote elided)

You're assuming people will act perfectly in conformance with your protocols, and I am saying that the other six billion of us live in a world where that just isn't going to happen. No human is perfect, except perhaps yourself. Tongue When things go wrong -- and they WILL, despite your protestations -- it's your notes that will take the blame in many people's minds. (Whether that's fair or not is irrelevant.)

What I really don't understand is your apparent unwillingness to consider any security issues with respect to your notes. This really does not inspire confidence.

On the contray, I embrace the fact we are free-thinking (or sporadic to those who deny freewill) individuals. Yes, failure will occur just as wallets are stolen and how other heinous crimes occur. You could say life it self has serious "security issues".

I don't know how you expect me to fix facts of life. I can't prevent people from abusing something they inherently have physical access to.

Unless there are other "flaws" that haven't been covered, I think I've done all I could in reducing risk as much as possible.
BCEmporium
Legendary
*
Offline Offline

Activity: 938



View Profile
February 28, 2011, 03:07:28 AM
 #47



This would be a good start for an idea to print it. QR-Code stays under a scratch layer.
Anonymous
Guest

February 28, 2011, 03:12:17 AM
 #48



This would be a good start for an idea to print it. QR-Code stays under a scratch layer.

Haha, wow, thank you.

Hm, we could sell such notes separately for those who need that layer of security, since most people aren't willing to paint pieces of paper. There is also the possibility of Kiosks, but that's an expensive venture that won't have any return until far into the future.

Wonderful, nice concept.
Ryland R. Taylor-Almanza
Hero Member
*****
Offline Offline

Activity: 812



View Profile
February 28, 2011, 03:12:31 AM
 #49



This would be a good start for an idea to print it. QR-Code stays under a scratch layer.
Love it!
error
Hero Member
*****
Offline Offline

Activity: 574



View Profile
February 28, 2011, 03:13:23 AM
 #50

On the contray, I embrace the fact we are free-thinking (or sporadic to those who deny freewill) individuals. Yes, failure will occur just as wallets are stolen and how other heinous crimes occur. You could say life it self has serious "security issues".

I don't know how you expect me to fix facts of life. I can't prevent people from abusing something they inherently have physical access to.

Unless there are other "flaws" that haven't been covered, I think I've done all I could in reducing risk as much as possible.

But you have not done all you can (see the nice mockup directly above). I don't expect you to fix "facts of life" (whatever that means). As a potential user, I do expect some level of security against the most obvious attacks. As it stands, your system is unworkable in the real world. I expect the market will reject it outright.

15UFyv6kfWgq83Pp3yhXPr8rknv9m6581W
Anonymous
Guest

February 28, 2011, 03:16:09 AM
 #51

On the contray, I embrace the fact we are free-thinking (or sporadic to those who deny freewill) individuals. Yes, failure will occur just as wallets are stolen and how other heinous crimes occur. You could say life it self has serious "security issues".

I don't know how you expect me to fix facts of life. I can't prevent people from abusing something they inherently have physical access to.

Unless there are other "flaws" that haven't been covered, I think I've done all I could in reducing risk as much as possible.

But you have not done all you can (see the nice mockup directly above). I don't expect you to fix "facts of life" (whatever that means). As a potential user, I do expect some level of security against the most obvious attacks. As it stands, your system is unworkable in the real world. I expect the market will reject it outright.
Well, I have yet to see any objective reasoning for rejection. Feel free to provide.

I guess you don't like credit cards or checks, eh?
Anonymous
Guest

February 28, 2011, 03:16:52 AM
 #52

We could simply have a fold of paper that you can seal over the QR code. That solves that.
Sultan
Full Member
***
Offline Offline

Activity: 214


View Profile
February 28, 2011, 05:52:41 AM
 #53

If I were to use this, I'd go for the scratchpad rather than folded paper! Just a personal preference if there were competing services.

http://images.onbux.com/banner.gif
I then use the money to buy BitCoins. You can too!
ColdHardMetal
Hero Member
*****
Offline Offline

Activity: 701



View Profile
February 28, 2011, 08:30:07 AM
 #54

If I were to use this, I'd go for the scratchpad rather than folded paper! Just a personal preference if there were competing services.

Scratchpad looks cooler but then it can only be transferred once. With a fold over cover it could go through multiple hands before being redeemed.

rebuilder
Legendary
*
Offline Offline

Activity: 1618



View Profile
February 28, 2011, 08:49:31 AM
 #55

Scratchpad looks cooler but then it can only be transferred once. With a fold over cover it could go through multiple hands before being redeemed.

Surely not? The QR code would only be needed to access the BTC in the block chain - when that is done, the printed note becomes invalid.

One thing to keep in mind is this is likely to be highly illegal pretty much anywhere. At the very least any government would want you to register to handle financial transactions. At worst, they'll see this as a paper currency issued by Atlas. CYA.

Selling out to advertisers shows you respect neither yourself nor the rest of us.
---------------------------------------------------------------
Too many low-quality posts? Mods not keeping things clean enough? Self-moderated threads let you keep signature spammers and trolls out!
ColdHardMetal
Hero Member
*****
Offline Offline

Activity: 701



View Profile
February 28, 2011, 09:20:02 AM
 #56

Scratchpad looks cooler but then it can only be transferred once. With a fold over cover it could go through multiple hands before being redeemed.

Surely not? The QR code would only be needed to access the BTC in the block chain - when that is done, the printed note becomes invalid.


Yeah, that's true. If you can just check the balance is there with the serial number then the scratch part is safe..

ribuck
Donator
Legendary
*
Offline Offline

Activity: 826


View Profile
February 28, 2011, 09:58:28 AM
 #57

Also, 20 - (20 * .005) =/= 19.9 BTC, ribuck?

In your original post you wrote 0.005%, which equals 0.00005, not 0.005.
Anonymous
Guest

February 28, 2011, 11:04:54 AM
 #58

Dont make them look anything like fiat or write "cash" or "bank" on them.

I like the scratchcard idea.
Blitz­
Donator
Legendary
*
Offline Offline

Activity: 1596


"Cut Your Loose"


View Profile
February 28, 2011, 11:08:18 AM
 #59

Dont make them look anything like fiat or write "cash" or "bank" on them.

I like the scratchcard idea.
Second that. A scratchcard would be a fine solution. Also, people like scratching them up … At least I do. Cheesy

"Bitcoin had been transformed from an anarachistic challenge to the financial status quo, to the crypto spawn of Satan, fuelled by cut-throat greed and delusions of avarice." - MatTheCat
"these people don't seem to want to stop till Bitcoin is completely destroyed and left like an old cum rag in the corner of the room." - ShroomsKit
Anonymous
Guest

February 28, 2011, 11:22:44 AM
 #60

Dont make them look anything like fiat or write "cash" or "bank" on them.

I like the scratchcard idea.
Second that. A scratchcard would be a fine solution. Also, people like scratching them up … At least I do. Cheesy

Its some peoples favourite past time. Sitting down at the cafe drinking a coffee while scratching a 2 dollar ticket Smiley
Pages: « 1 2 [3] 4 »  All
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!