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Author Topic: HOWTO: create a 100% secure wallet  (Read 249546 times)
MrSam
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June 19, 2011, 02:39:21 PM
 #161

Better to be safe then sorry! Good intel!
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jack_jones
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June 19, 2011, 04:35:22 PM
 #162

Thanks for this post!
ivank2139
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June 19, 2011, 11:36:24 PM
 #163

There really is no such thing as 100% secure.  Not for your wallet, a web site or anything else.

Security is an interesting business, currently the attackers have the upper hand, and the defenders are playing catchup.  This has been going on since the first guy picked up a stick to whack his enemy with only to find his enemy came back with a shield and a stick.  Eventually the defenders will catch up since this is really a vital issue, not just for bitcoins but for all aspects of life, including of course our digital lives.
stabaho
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June 20, 2011, 12:10:28 AM
 #164

Thanks for this write up. Great work.

If you want to send me some coins: 1M1RFqdDHZQCezWZ9CrKvQav1MgriqjCK1
Mousepotato
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June 20, 2011, 04:07:10 AM
 #165

Thanks for the EDU on this!  I'm still a little foggy about wallet.dat though.  Suppose I want to move my Bitcoin wallet to an encrypted drive that's taken offline/unplugged when I'm not using it.  Do I simply move wallet.dat, or do I have to move the entire directory that it resides in?  Also, what would happen if my wallet.dat was on a USB drive that was offline/unplugged and I disbursed BTC from my pool account to my wallet?

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cypherdoc
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June 20, 2011, 04:37:10 AM
 #166

i have a question:

when in Ubuntu live cd after having opened up bitcoin client and clicked in a few new addresses; why not download entire block chain and send coins to one of those addresses and wait for confirmation to verify that everything is working with the new wallet before saving the wallet.dat file to the usb stick?

i worry about a bunch of unclaimed coins sitting on the block chain which i might not claim for 10 yrs or so.
HatlessCat
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June 20, 2011, 06:32:27 AM
 #167

thank you very much for the information, i was looking for this!
Bitfox
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June 20, 2011, 08:08:42 AM
 #168

Thank you for the very practical solution! Just one minor clarification for those who need anonimity:

Don't send those bitcoin addresses to yourself by e-mail because you may be traced that way
Just copy and paste them onto SD card

Also try to remember the first 6 characters of an address, it enables you to search for it in blockexplorer.com and see the received bitcoins for that particular address. Knowing those 6 characters is useful because that way you can use any mobile phone with web browser to see your received bitcoins

P.S. If blockexplorer.com displays more than one address starting with the same 6 characters (never happened to me yet) you should stil be able to identify yours by "first seen" and/or by some known transactions 

valtiel
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June 20, 2011, 08:49:49 AM
 #169

some recomendation for encrypticng program in linux? im not linux user. but i know how install and run ubuntu at least. sadly i dont know how install packaged directly only using synaptic.
arkados
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June 20, 2011, 11:34:36 AM
 #170

some recomendation for encrypticng program in linux? im not linux user. but i know how install and run ubuntu at least. sadly i dont know how install packaged directly only using synaptic.
For GNU/Linux and Windows: TrueCrypt.
You can mix keyfiles and password, against keyloggers. But don't forget to dismount all volumes after use Smiley
sodgi7
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June 20, 2011, 12:13:50 PM
 #171

Best just to but it on a hidden encrypted volume inside a hidden virtual machine that has encrypted archive file that doesn't seem like a archive file Smiley
arkados
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June 20, 2011, 12:41:24 PM
 #172

Best just to but it on a hidden encrypted volume inside a hidden virtual machine that has encrypted archive file that doesn't seem like a archive file Smiley
I've better: LiveCD system accessing physically encrypted volume (external hard drive with fingerprint recognition ?), inside of which there is some trap files plus a TrueCrypt volume named "Pr0n.zip" containing a BtrFS filesystem, inside of which there is a volume with some random porn pics in it "to make sure the kids/woman don't find out" plus a hidden volume with a read-only wallet.dat which name has been changed to Thumbs.db.
adamncsu
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June 20, 2011, 01:51:33 PM
 #173

this is exactly what i needed. thanks!
btcsquirrel
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June 20, 2011, 08:36:29 PM
 #174

Truecrypt is just awesome for this sort of thing.  I have 3 tc files on 3 different removable media.  The wallet.dat doesn't exist anywhere else.  Why 3 different copies?  Fear of one of them going bad, getting smashed/wet, etc.
ZareliMan
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June 21, 2011, 12:25:17 AM
 #175

Truecrypt does work like charm...

Donate to  1FCtkTwsxD57VXQpXPvwYd1Rze6yeXAyuX
tominator
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June 21, 2011, 02:51:58 AM
 #176

Here's what I did to secure my wallets:

1. Installed Dropbox on home/work computers.
2. Installed Truecrypt on my home/work computers.
3. Created two different Truecrypt containers, each one only 2 megs in size.
4. Placed the encrypted container files inside of Dropbox.
5. Mounted the first container on drive Z: and moved my wallet.dat from my work computer into it (after turning off the bitcoin client, of course).
6. Dropped to a command line and used the "mklink" command to create a symbolic link between the wallet.dat file inside the Truecrypt container and the wallet.dat pointer in my bitcoin user data folder. Note: If you want to store *everything* in your encrypted container, and not just the wallet, you can alternately just run "C:\Program Files\Bitcoin\bitcoin.exe -datadir=Z:\" when launching the Bitcoin client, but I like to just symlink the wallet file so the encrypted container can remain small and lightweight inside of Dropbox.

Now, whenever I want to open one of my wallets, I just mount it's corresponding container using Truecrypt and launch Bitcoin. Using this method, I can very easily and securely switch between multiple wallets from multiple computers. I can mount my work computer's wallet using my home computer and vice versa. As soon as I'm done with whatever transactions I need to do, I turn off the Bitcoin client and un-mount the wallet container.

If you want to keep the Bitcoin client open and running (so that it is always up-to-date with the block chain), just create a new, blank dummy wallet and corresponding container and mount that. Just make sure that you don't ever store any BTC in it or actually use it for anything, since it will be mounted at all times and if your machine was compromised someone could easily send out any money stored in it.

And that's all I have to say about that... until I post another reply, that is.
KMBTC11
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June 21, 2011, 05:23:47 AM
 #177

Thanks for posting this info.  I'm not up on the latest security and want to make sure my meager BCs are safe.

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Jessica
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June 21, 2011, 12:18:17 PM
 #178

This is a really useful guide, thanks!
Anyone know if MyBitCoin is secure enough?
Brutus
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June 21, 2011, 06:37:51 PM
 #179

+1 for the OP and TrueCrypt is good sauce.

...
EmilyClark
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June 21, 2011, 09:11:25 PM
 #180

omg.. the client should automatically encrypt your wallet for you and make your life as easy as possible..
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