A "Real" Paper/Physical Wallet | Bitcointalksearch.org

glitch003

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Quote from: johnniewalker on May 04, 2013, 05:17:21 AM

Hi everybody,
I have seen people trying to sell a "Personal Bitcoin Card". All it is is a card with 2 QR codes-1 is public address, the other is private key. So obviously it's just like a paper wallet. I would be very hesitant to buy such a thing, because you are eternally using the same key pair. To me, paper wallets are great "one time use" devices.
So, am I being paranoid about reusing and reusing key pairs, or is there something to the argument?
Thanks!

Check this out: http://piperwallet.com/

With it, you could essentially print an equivalent to a "personal bitcoin card" for each individual transaction. So for example, you could load 0.1 BTC onto 10 paper wallets generated by Piper (1 BTC total), and then each key pair is a one-time use where after you've drained the 0.1BTC you just throw out that paper wallet and print a new one.

So no need to reuse a key pair as long as you have a way to easily print many paper wallets.

johnniewalker

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Yes, I humbly admit that I cyber-nutted myself in the face. To other posters-thanks for the advice..

freethink2013

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your other personality doesn't like you so you are right being paranoid.

dave111223

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lol, you gave yourself a thumbs down icon, then pissed that someone gave you a thumbs down? Cheesy

wopwop

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lol fail

jl2012

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Quote from: johnniewalker on May 04, 2013, 05:27:18 AM

First of all-you just suck if you're the one who gave this a thumbs down.

Anyways, to elaborate,
I keep ALL of my bitcoins physical (maybe I really am paranoid by nature), except about .25BTC in an online hot wallet. I have bills (part of the reason I do like this is because I like designing the bills) of denominations from .1-25BTC. I keep them in a safe place, and when I want to buy something I just redeem it to my hot wallet.

So, I guess my question is basically this: am I a weirdo for doing this, or is there any way reusing keypairs could be dangerous?

Unless you are worrying about quantum computer, reuse keypair is safe as long as you keep the private key safe.

BTW, the thumb down is given by yourself

johnniewalker

legendary

Activity: 896

Merit: 1000

First of all-you just suck if you're the one who gave this a thumbs down.

Anyways, to elaborate,
I keep ALL of my bitcoins physical (maybe I really am paranoid by nature), except about .25BTC in an online hot wallet. I have bills (part of the reason I do like this is because I like designing the bills) of denominations from .1-25BTC. I keep them in a safe place, and when I want to buy something I just redeem it to my hot wallet.

So, I guess my question is basically this: am I a weirdo for doing this, or is there any way reusing keypairs could be dangerous?

johnniewalker

legendary

Activity: 896

Merit: 1000

Hi everybody,
I have seen people trying to sell a "Personal Bitcoin Card". All it is is a card with 2 QR codes-1 is public address, the other is private key. So obviously it's just like a paper wallet. I would be very hesitant to buy such a thing, because you are eternally using the same key pair. To me, paper wallets are great "one time use" devices.
So, am I being paranoid about reusing and reusing key pairs, or is there something to the argument?
Thanks!

Topic: A "Real" Paper/Physical Wallet (Read 1498 times)