Topic: Bitcoin Checks : R3 - page 4. (Read 13559 times)

I got to mine with the LED flash on my phone... just in time for new ones.

I really shouldn't made as many as I did before getting any orders, specially when I knew they would be subject to change... 

Just got a PM that new checks are being sent, so I'm guessing OP found a quick fix for the issue (either that or the misprinted samples I got were old and the problem was already fixed).

Updates will come as soon as I've got 'em!

Got the misprinted samples today and I can definitely say you might want to put a matching set of holographic stickers on the back, or perhaps print some kind of random pixels over that area in the back. I put the check on top of my phone's flash and at the lowest brightness setting I could almost make out the privkey. Cranked all the way up, I could read it clearly. Since this tends to be a "pics or it didn't happen" sort of crowd....


This is at the lowest setting.


This is at the highest setting


Here I've flipped the above image for those of you who can't read backwards


And just in case anyone couldn't read the portion of the key visible in the pic, I've crappily traced the visible characters in red.


Here I've copied the entire privkey down via the method above just to generate an address and make sure it matches what's on the check. The only character not easily discerned via the above method was the lowercase j, because it was on the border of the two stickers. Still, it didn't take but a few tries to guess that character right (two, actually, since the only other thing it looked like at all was an i)

Also keep in mind that this was just the two little surface mount LEDs. I can get a flashlight at 7-11 for $5 that has several times as many. It could also be feasible (though I don't have the equipment to test) to use a flatbed scanner with a lid-light (the kind used for scanning slides, transparencies and negatives) and a little photoshop magic to make this a 3-second process instead of sitting hunched over with a flashlight reading the key off one character at a time for several minutes.

Other than that, these are pretty fantastic little checks and thus far I've not found any other problems.

Peer review FTW  

just got mine today, looks just like the one in the picture. The paper is thick and of good quality. I tried to get the private key without scratching the stuff off but you absolutely cannot see through it.

Overall it is pretty cool!

nice

Just provide people with the firstbits from your check and they can fund it until you decide to redeem it.

I am starting to think these might be a really good Idea for like giving some one a bond. Fill one and give it to some one to hold onto say 10 years when hopefully BTC will be 20 or 30 USD each! Wishful thinking.
I might order some to do this with.. Thanks again for the check..  Are you able to load the one I have?

New checks will have mini private keys. ...except i still have like 300 checks already made.

Thanks to everyone that provided feedback for my samples! Maybe I'll get some legitimate orders now. 

I'll take a crack at it. PMing my shipping info. 

Got mine today too. Very nice I am impressed. Thanks!

Got the freebee today. Looks pretty nice, I have to say.

I ordered a freebie. Thanks

I still have a few of the misprinted ones if anybody wants to try their luck hacking a check w/o ruining their own.

Ordered my freebee. Thanks

https://twitter.com/cryptocoinmedia/status/211665217782947840

Posted, and ordered a freebie 

Nice service.

Agreed, but doesn't quiet work with the current design. Since not everyone can scan, I need the QR and plain text to be functional, but thats to many stickers... These weren't meant to be mass imported, I'd have to make one specifically for that. But when you go down that road I think Casascius has the best idea, paper wise. https://en.bitcoin.it/wiki/Casascius_Bitcoin_POS_system

Qr codes work great

Unfortunately I cant seem to get that much information, that small and consistently legible by a scanner as a barcode... I might have a new idea that'll do something like this, We'll see.

Lmao