Bitcoin Forum
December 08, 2016, 10:31:58 PM *
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 5 »  All
  Print  
Author Topic: Casascius Bitcoin POS system  (Read 9335 times)
casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
September 30, 2011, 11:33:39 PM
 #1

Requesting comments on the following:

https://en.bitcoin.it/wiki/Casascius_Bitcoin_POS_system


Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
1481236318
Hero Member
*
Offline Offline

Posts: 1481236318

View Profile Personal Message (Offline)

Ignore
1481236318
Reply with quote  #2

1481236318
Report to moderator
1481236318
Hero Member
*
Offline Offline

Posts: 1481236318

View Profile Personal Message (Offline)

Ignore
1481236318
Reply with quote  #2

1481236318
Report to moderator
1481236318
Hero Member
*
Offline Offline

Posts: 1481236318

View Profile Personal Message (Offline)

Ignore
1481236318
Reply with quote  #2

1481236318
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1481236318
Hero Member
*
Offline Offline

Posts: 1481236318

View Profile Personal Message (Offline)

Ignore
1481236318
Reply with quote  #2

1481236318
Report to moderator
1481236318
Hero Member
*
Offline Offline

Posts: 1481236318

View Profile Personal Message (Offline)

Ignore
1481236318
Reply with quote  #2

1481236318
Report to moderator
1481236318
Hero Member
*
Offline Offline

Posts: 1481236318

View Profile Personal Message (Offline)

Ignore
1481236318
Reply with quote  #2

1481236318
Report to moderator
Littleshop
Legendary
*
Offline Offline

Activity: 1316



View Profile WWW
September 30, 2011, 11:43:09 PM
 #2

Requesting comments on the following:

https://en.bitcoin.it/wiki/Casascius_Bitcoin_POS_system


Pretty detailed!  Does this exist or are you setting specifications?

slothbag
Sr. Member
****
Offline Offline

Activity: 369



View Profile
October 01, 2011, 12:30:13 AM
 #3

Sounds great.  If "Somebody, Inc" can be configurable in the device so its possible to set up your own "Back end/Processing" service.  And that communication is done via standard JSON rpc or something similar to make it easy. 

You'd probably sell a whole bunch Smiley
casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
October 01, 2011, 02:11:54 AM
 #4

This is something I'd like to coordinate being put together as an open-source project.

The Vx510 and Vx570 are programmed in C, using a proprietary unix-like OS.  The same codebase could be easily adapted to other hardware.

EDIT: added this photo. OK, the software in its fully working form isn't real, but this photo IS real (including the real deal on the screen - it is just the beginning - I'll post the code to github)


Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
Littleshop
Legendary
*
Offline Offline

Activity: 1316



View Profile WWW
October 01, 2011, 02:44:31 AM
 #5

I like your ideas on the qr printout and ways of operation. 

This does seem like a large project.

BurtW
Legendary
*
Offline Offline

Activity: 1792

All paid signature campaigns should be banned.


View Profile WWW
October 01, 2011, 02:49:25 AM
 #6

I am interested in joining in the fun.

Our family was terrorized by Homeland Security.  Read all about it here:  http://www.jmwagner.com/ and http://www.burtw.com/  Any donations to help us recover from the $300,000 in legal fees and forced donations to the Federal Asset Forfeiture slush fund are greatly appreciated!
Stephen Gornick
Legendary
*
Offline Offline

Activity: 2002



View Profile
October 01, 2011, 02:53:15 AM
 #7

Quote
a payment rejection is the receipt of another confirmed transaction on the Bitcoin network that purports to spend the same funds to a different payee, invalidating the original transaction paying you.

How about a payment that just isn't confirming.  For example, let's say no fee was paid and no miners have included it?

cbeast
Donator
Legendary
*
Offline Offline

Activity: 1722

Let's talk governance, lipstick, and pigs.


View Profile
October 01, 2011, 03:55:31 AM
 #8

Too complex for most cashiers. I would have 2-3 modes.
1. A QR self-service smartphone type.
2. Pre-loaded bitbills-type cards that have the entire balance transfered and then change returned to the consumer's public address on their ID.
3. Possibly the ability to return change to a semi-secure paper bitbill that is printed (I don't trust magnetic strips) and a backup sent to an escrow that will expire if spent or not claimed within a reasonable time.

[Edit] After seeing the photo, I see what you are talking about. I would buy these and use them just to sell bitcoin stored value cards.

Any significantly advanced cryptocurrency is indistinguishable from Ponzi Tulips.
casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
October 01, 2011, 04:12:50 AM
 #9

Quote
a payment rejection is the receipt of another confirmed transaction on the Bitcoin network that purports to spend the same funds to a different payee, invalidating the original transaction paying you.

How about a payment that just isn't confirming.  For example, let's say no fee was paid and no miners have included it?

Then it remains unconfirmed until it confirms, just like on the Bitcoin client.  If not enough of a fee was paid to even get it relayed, it wouldn't have heard about the transaction.  Keep in mind that this is a spec - my imagination for how such a product should work in the end - not how it actually does.

Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
Steve
Hero Member
*****
Offline Offline

Activity: 868



View Profile WWW
October 01, 2011, 04:17:12 AM
 #10

Would it be able to handle credit/debit cards as well?  Or would the device have to be bitcoin only?

(gasteve on IRC) Does your website accept cash? https://bitpay.com
casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
October 01, 2011, 04:21:54 AM
 #11

Would it be able to handle credit/debit cards as well?  Or would the device have to be bitcoin only?

Depends on how it gets written and how nicely it plays with the VeriFone multi-application coordinator.  It's definitely possible in theory - but there is also another practical hurdle.  It only runs signed code, and if you get a terminal from a bank, the terminal may only run code signed by the bank, if they have enabled this feature.  On the contrary, if you have an "unlocked" terminal (like I have, and like most terminals actually are), the code still has to be signed, but with a key they give away freely in their SDK.

Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
Littleshop
Legendary
*
Offline Offline

Activity: 1316



View Profile WWW
October 01, 2011, 04:26:58 AM
 #12

The VX570's are about $250 refurbed on ebay.  While it would be ideal to have the same machine do standard credit cards, it would probably not be able to do them as Casacius says above.  Having a second machine would not be too hard for most stores if it saved them a few percent on some sales. 

casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
October 01, 2011, 04:36:05 AM
 #13

The VX570's are about $250 refurbed on ebay.  While it would be ideal to have the same machine do standard credit cards, it would probably not be able to do them as Casacius says above.  Having a second machine would not be too hard for most stores if it saved them a few percent on some sales.  

The Vx510s are cheaper and are exactly the same but without a USB port.  (other minor cosmetic differences too, but same capabilities).

EDIT: The Vx570s, having a USB port, can also take their programming from a USB flash drive.  This makes tinkering a whole lot easier if you don't have the SDK and all the gear (these are normally flashed via serial or via dialup modem).  If you pick up a Vx570, I can compile and sign a binary, send it to you, and you can just flash your own unit through the USB port.  Of course, I do own a dialup server that also incorporates the dialup flashing, so assuming this ever takes off, I will have the means to help you flash your units you buy on eBay or whatever.

By the way, all of these terminals can be acquired either new, or well-refurbished, in the $200 to $300 price range.  Refurbished terminals often look very good, because they get acquired when merchants go out of business or upgrade, and the refurbishers often completely replace the exterior parts (which will make them appear new - it depends on the refurbisher).  Buy them only from people who are selling the terminal straight-out, not from somebody who also sets up merchant accounts.

Be aware that Ethernet is an option on these models (the standard comm is dialup), so if you ever have the urge to buy one of these, make sure you get the model with Ethernet (also known as dual comm or abbreviated DC).

Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
October 01, 2011, 04:37:12 AM
 #14

Here is the code for what I have so far (which is essentially a hello world) and what went into the image above... also meant as an introduction to the programming environment used on these.

https://github.com/casascius/vfbitcoin

Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
WiseOldOwl
Full Member
***
Offline Offline

Activity: 224



View Profile
October 01, 2011, 05:46:14 AM
 #15

*Applaud!!!*
Nice Work

http://cryptoswap.com
XRP/BTC/LTC/BTE
casascius
Mike Caldwell
VIP
Legendary
*
Offline Offline

Activity: 1344


The Casascius 1oz 10BTC Silver Round (w/ Gold B)


View Profile WWW
October 01, 2011, 07:13:15 AM
 #16

I was able to incorporate qrencode into the source, and got it to print the QR codes on the printer, as well as show one on the screen.  This is the first time I have ever made a VeriFone POS machine render a QR code, but it seems to have worked pretty well.

I pushed the relevant code to github.


Companies claiming they got hacked and lost your coins sounds like fraud so perfect it could be called fashionable.  I never believe them.  If I ever experience the misfortune of a real intrusion, I declare I have been honest about the way I have managed the keys in Casascius Coins.  I maintain no ability to recover or reproduce the keys, not even under limitless duress or total intrusion.  Remember that trusting strangers with your coins without any recourse is, as a matter of principle, not a best practice.  Don't keep coins online. Use paper wallets instead.
finway
Hero Member
*****
Offline Offline

Activity: 714


View Profile
October 01, 2011, 07:39:14 AM
 #17

Nice work.

Villem Anton
Newbie
*
Offline Offline

Activity: 29


View Profile
October 01, 2011, 09:08:28 AM
 #18

What/who do you need to trust,
* As a merchant?
* As a customer?
* Man in the middle attacks?
ThomasV
Legendary
*
Offline Offline

Activity: 1722



View Profile WWW
October 01, 2011, 11:32:09 AM
 #19

lovely!!!
now that you're done with this, here is your next homework: https://en.bitcoin.it/wiki/Smart_card_wallet

Electrum: the convenience of a web wallet, without the risks
ercolinux
Hero Member
*****
Offline Offline

Activity: 910



View Profile WWW
October 01, 2011, 01:28:30 PM
 #20

That's really a nice idea, and for what I could read very well designed.
I'm thinking on proposing that to some shops near where I live (even if there are very few bitcoin user here): it could be a "reverse promotion" of bitcoins, instead of being the customers to ask to the shop owners to implement bitcoin, it could be the shop holder to propose to customers to use them.

Bitrated user: ercolinux.
Pages: [1] 2 3 4 5 »  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!