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Author Topic: HOWTO: create a 100% secure wallet  (Read 275351 times)
Phylli-Menke
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March 23, 2013, 01:07:36 PM
 #1901

One more question, how do I create a second wallet?

If I backup my current one, how do I get a separate one for daily use?
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hmmdlp
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March 23, 2013, 01:19:25 PM
 #1902

Hey guys, I've got a question for you.  How big is the block chain going to get?  I ask because I want to make sure the usb drive I use is actually large enough to encrypt an entire client indefinitely.  So I know that as blocks get very old they're no longer saved, but aren't the new blocks larger than the old blocks?  Meaning, won't the size of a full install always increase?

Or then there's the other option, of just using a 8 or 16 GB drive and using it as a full OS+bitcoin client.
mannsurjit
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March 23, 2013, 01:31:14 PM
 #1903

I downloaded BitCoin and installed the program, and it shows up in my C;/Program Files, but no where in there is a wallet.dat file. Does anyone know why?
rayallen
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March 23, 2013, 01:39:24 PM
 #1904

Encrypt your wallet...makes sense. Thanks for the post!
CCBing
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March 23, 2013, 11:43:03 PM
 #1905

Seems good...Since I won't have too many transactions...I don't have to backup frequently...So I would like to try safer ways...
Stacy_Santiago
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March 24, 2013, 12:46:35 AM
 #1906

There was some very helpful information in this thread. Thank you very much!
Lillian_Salinas
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March 24, 2013, 12:50:28 AM
 #1907

I think the guide to being secure doesn't need to be complex at all, though I don't know if the required technologies are available to write such a simple guide.

For example I think that an offline computer can send money without being connected to the internet. You just use your signing keys(you must also know manually how much bitcoins you have beforehand, without having any blockchain around. Here you can use blockchain.info to check that up, advised to access it through Tor. Then since you know how much you have, you use your private key on that offline computer and sign a transaction. Then you transfer that transaction with a usb key storage to your main computer which may be virus and trojan+keylogger infested and just execute the transaction. Voila!

Though are these technologies available. We would need a very simple program, one that doesn't like need the latest version of Ubuntu, not the full fledged bitcoin-qt, except if it can work in offline mode and it can allow to send Bitcoins without needing an internet connection.

The above are maybe a bit of half-baked thoughts.
pat
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March 24, 2013, 12:54:08 AM
 #1908

Very usefull information. Thank You
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March 24, 2013, 12:57:33 AM
 #1909

would you trust an online wallet with considerable amount of bitcoins?
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March 24, 2013, 01:00:23 AM
 #1910

Best way you be to just memorise if you can
kmalacath
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March 24, 2013, 01:03:53 AM
 #1911

Ok, here comes this newbie's first post....

A couple issues:

1)Typo: "walled.dat".

2)There's no protection against MITM attack when you download that LiveCD - people need to ensure that the LiveCD image they download hasn't been trojaned on its way to them.  Checking securely obtained SHA hashes, PGP/GPG keys ... very important and worth mentioning!  Ditto for the bitcoin client.
OP says: "I think it makes sense to trust both the Ubuntu LiveCD as well as the client from bitcoin.org for now."  Well, it makes sense if you ensure they are what you think they are -- you have to trust someone.
woodsyallin
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March 24, 2013, 01:07:49 AM
 #1912

The problem with tails is adding programs and saving the data.  They purposely make it difficult.  Better off using liberte.  much more robust.
loann
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March 24, 2013, 01:19:21 AM
 #1913

Thanks for the guide, i will for sure use this.
anniewattson
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March 24, 2013, 01:26:38 AM
 #1914

makes sense. Thanks for the post!
christop
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March 24, 2013, 01:42:12 AM
 #1915

I think the guide to being secure doesn't need to be complex at all, though I don't know if the required technologies are available to write such a simple guide.

For example I think that an offline computer can send money without being connected to the internet. You just use your signing keys(you must also know manually how much bitcoins you have beforehand, without having any blockchain around. Here you can use blockchain.info to check that up, advised to access it through Tor. Then since you know how much you have, you use your private key on that offline computer and sign a transaction. Then you transfer that transaction with a usb key storage to your main computer which may be virus and trojan+keylogger infested and just execute the transaction. Voila!

Though are these technologies available. We would need a very simple program, one that doesn't like need the latest version of Ubuntu, not the full fledged bitcoin-qt, except if it can work in offline mode and it can allow to send Bitcoins without needing an internet connection.

The above are maybe a bit of half-baked thoughts.
The Bitcoin-qt client can create a raw transaction offline with the createrawtransaction command (in the console window), and then it can send a raw transaction with the sendrawtransaction command.

See https://en.bitcoin.it/wiki/Original_Bitcoin_client/API_Calls_list for a list of commands.

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March 24, 2013, 01:54:11 AM
 #1916

Armory allows offline transactions.

tipton
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March 24, 2013, 04:07:34 AM
 #1917

Thanks for the info.
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March 24, 2013, 01:09:26 PM
 #1918

I downloaded BitCoin and installed the program, and it shows up in my C;/Program Files, but no where in there is a wallet.dat file. Does anyone know why?
If you r using win7 wallet.dat is located in users folder -> your account name -> AppData (NB! this is hidden folder) -> Roaming -> Bitcoin


 
 
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kzhang
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March 24, 2013, 03:32:49 PM
 #1919

Now I am using offline bitaddress + brainwallet to do all bitcoin things, so far so good.
Zackary
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March 24, 2013, 05:50:14 PM
 #1920

Here's my method on my Mac:

1) Login to wallet on blockchain.org and turn off WiFi
2) Navigate to "Receive Money" and generate a new address
3) Navigate to "Import/Export" and print paper wallet
4) Logout of blockchain.org and turn WiFi back on

The newly generated address was created offline and blockchain.info will not keep it since it never synced (online).
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