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1  Bitcoin / Development & Technical Discussion / Re: Using a One-time Pad to encrypt a paper wallet Private Keys on: May 21, 2013, 10:49:52 AM
1. Since private keys start with 5, you're going to be leaking the first digit of your OTP.
2. Using your OTP more than once can lead to it being compromised. You're lucky that the underlying private key data is random, but you're in trouble if one of your private keys is discovered.


2  Other / Beginners & Help / Re: Opensource project BitStamper for provably timestamping files using Bitcoin on: April 11, 2013, 12:33:07 PM
Could you not just use the sha256 sum of the file as a private key?
You can then get the public key (bitcoin address) from that.
Then you transfer money in and out through that address.
This way you're not destroying money, and can avoid the fees for small transactions.
3  Bitcoin / Development & Technical Discussion / Re: The minimum transfer fee is not trivial anymore on: April 02, 2013, 12:05:55 PM

Create a transaction A
Output - To whoever
Change - To you.
Fee - To Random Miner.

Send change in transaction B
Output to Mining pool you want to support.
Change - None.
Fee - To Random Miner.


This way the mining pool is incentivized to make sure both your transactions end up in blocks, but it doesn't really matter who puts them in.
You'll just need to set your fees low enough to get your transaction relayed, and if you can submit your transaction directly to a miner you might even be able to avoid needing to do that.
4  Bitcoin / Bitcoin Discussion / Re: Beware: "mtgox" yubikey trojan/phishing email on: November 19, 2011, 11:06:36 PM
I emailed leaseweb about it already. More complaints (to abuse@leaseweb.com ) wouldn't hurt, though.

The messages are still coming in. (to /dev/null at least)
I emailed a complaint.
5  Bitcoin / Bitcoin Discussion / Beware: "mtgox" yubikey trojan/phishing email on: November 19, 2011, 04:00:47 PM

I recently received an email claiming to be from mtgox (It most certainly isn't)

Quote
From: MtGox <noreply@mtgox.com>                                                 
Subject: Protect your Mt.Gox. account using Yubikey!                   
       
Protect your Mt.Gox. account using Yubikey!                                     
We have attached your own personal Yubikey.                                     
Download and install it.                                                       
Mt.Gox. Team

Content-Type: application/octet-stream; name="MtGoxYubikey.exe"

I've not been crazy enough to do anything with the exe file other than delete it.
6  Bitcoin / Bitcoin Discussion / Re: Unit name for 1e-8 BTC on: August 24, 2011, 05:33:00 AM
Stick with SI prefixes.

10-9 is nano

So the smallest (current) unit would be 10 nano(bit)coins.


Edit: It seems helloworld posted the same thing, but more quickly. I agree with him.
7  Bitcoin / Bitcoin Discussion / Re: Bitcoins, or the ultimate proof of ownership on: August 15, 2011, 06:04:26 AM
The same blockchain is used. All they do is to publicly declare, for example, this Bitcoin from this transaction to be the master BTC.

How do you prevent it being mixed with other coins?
8  Other / Archival / Re: delete on: August 13, 2011, 07:25:14 PM
Who is buying Ixcoins and why?
9  Bitcoin / Bitcoin Discussion / Re: Bitcoin2Cash having problems? on: August 07, 2011, 05:31:11 PM
the madhatter is part of the mybitcoin fiasco  ?

http://bitcoin.crimeunit.net/wiki/index.php/MyBitcoin    at the bottom says Tom Williams   Alias TheMadhatter    ?

off topic of this thread:
My reading of that page says that The Mad Hatter is an alias that is interesting.
Which is NOT that Tom Williams = TheMadHatter.


Edit / Disclaimer:
I'm not affiliated with bitcoin2cash in any way other than that I've been paid to change my sig to advertise bitcoin2cash.
If I discover something shady is going on I will change it.
Until then I'm prepared to give the guy a day or two to respond to this thread.
10  Economy / Service Announcements / Re: New, simple online wallet: www.instawallet.org - no signup required on: August 02, 2011, 05:04:13 PM
Click on home.

Thanks. It seems I had to also delete some old instawallet cookies, but now it gives me new addresses as I'd expect.
11  Economy / Service Announcements / Re: New, simple online wallet: www.instawallet.org - no signup required on: August 02, 2011, 04:09:04 PM
Is there a way to get a new instawallet address?
It keeps giving me the same address and I'd like a new one.
12  Bitcoin / Project Development / Re: UK exchange: Britcoin on: August 02, 2011, 08:06:13 AM
You guys (britcoin/intersango/etc) have offline backups of your wallet.dat files right?
13  Bitcoin / Bitcoin Discussion / Re: Britcoin V2 Community Input on: July 03, 2011, 02:37:04 PM
Surely this is a solved problem in the finance industry?

I think I like 3 the best but I'm still not entirely sure what the problem with it is.
14  Economy / Marketplace / Re: Show your firstbits - get 2 bitcents on: June 30, 2011, 08:02:14 PM
Watch out for that first step. It's a duzy!
15  Economy / Games and rounds / Re: Make me laugh for a bitcent on: June 28, 2011, 02:54:26 PM
Have you checked out http://witcoin.com/ where you can do just that.

(Edit: reward/earn bitcoins for good content. Not borrow thyme.)
16  Bitcoin / Development & Technical Discussion / Re: Add option to add a fee to dead transactions on: June 27, 2011, 06:20:24 AM
Why isn't a dependent transaction which pays a fee all that is needed? This requires no dropping of existing transactions.

1. A+B -> C + D
2. D+E -> F + (G - Fee)

In this case the Fee pays for both transaction 1 and transaction 2.
The only problem seems to be if you make a transaction with zero change and then want to add an additional fee. But that is up to the choice of the sender anyway.
17  Bitcoin / Bitcoin Discussion / Re: ClearCoin Closing on: June 26, 2011, 09:30:54 AM
Sounds like something that can be coded in a week...

It's thinking like that that got mtgox into trouble.
18  Bitcoin / Bitcoin Discussion / Re: How do wallets work? -- help the newbie with a multiple backups of diff. wallets on: June 24, 2011, 03:25:59 PM
EDIT: This wasn't completely his fault, since wallets are suppose to create 100 addresses for you to use, so the second address should have been in the backup, but there was a bug.

I'd just like to clarify this: There was NOT a bug. This happened before the 100 address pool code was added to the standard bitcoin software.

19  Other / Beginners & Help / Re: Proposal for secure, permanently offline wallet (with money sending support) on: June 24, 2011, 12:35:32 PM
I'm fairly sure they offline computer doesn't even need a copy of the block chain to send a transaction.

https://en.bitcoin.it/wiki/Transactions
20  Economy / Marketplace / Re: witcoin giveaway (faucet open) on: June 24, 2011, 06:11:08 AM
Remember you can always post in the 'free' section of witcoin for free and earn witcoins if people think you make good posts.
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