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Author Topic: HOWTO: create a 100% secure wallet  (Read 249478 times)
flatfly
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May 17, 2012, 02:46:08 PM
 #721

For me the client is useless if i can't import and use my own keys. Maybe i can do that using linux and than using the so created electrum.dat with the (flatfly) windows build. I dont know if that works but anyway it is quite a detour.  Undecided

hi,

1/ you can import your addresses using my build, I just tried that again with 0.49 and it works, but:
 - the wallet must be unencrypted at the time of import
 - you won't see any feedback on the command prompt. but when you open the GUI, the imported address will be there.

2/ indeed my build doesn't support text (console) mode yet.
   full command-line support is on my to-do list and will be hopefully ready soon.

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flatfly
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May 17, 2012, 03:07:30 PM
 #722

Hello! Due to the newbie restrictions, i can't post this in the "electrum" thread, so i post it here:

Electrum is an awesome client but there seem to be some bugs in the "flatfly" windows build:
  • It only generates new addresses (new wallet) with an online connection. And if the client is closed and then started without a connection, the gui doesnt show the addresses anymore, though they are still in the wallet.dat.
  • The command line parameters (eg. import, addresses, ..) dont work!

It doesnt matter, if the wallet is encrypted or not.
I use electrum 0.49 - Win Vista

With the "old" build from btcurious, it worked!



BTW, which version of the btCurious build were you using?
Some early versions did have command line support but didn't work well with Windows XP,
while the later (Cameyo-based) ones, XP-compatible, no longer supported console mode either, IIRC.

But I'm close to finding a solution to that problem.

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bitcats
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May 17, 2012, 04:19:09 PM
 #723


1/ you can import your addresses using my build, I just tried that again with 0.49 and it works, but:
 - the wallet must be unencrypted at the time of import
 - you won't see any feedback on the command prompt. but when you open the GUI, the imported address will be there.

2/ indeed my build doesn't support text (console) mode yet.
   full command-line support is on my to-do list and will be hopefully ready soon.

How can i import an address from the GUI (without the command line)? How can i display the private keys without the command parameters (console)?

I think the last btcurious version i used was 0.40

I hope you will soon succeed with the full command-line support. It would be a big gain.

I look forward to make a donation to your addr. Grin

"Unser Problem ist nicht ziviler Ungehorsam, unser Problem ist ziviler Gehorsam."  - Howard Zinn
flatfly
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May 17, 2012, 08:53:59 PM
 #724


1/ you can import your addresses using my build, I just tried that again with 0.49 and it works, but:
 - the wallet must be unencrypted at the time of import
 - you won't see any feedback on the command prompt. but when you open the GUI, the imported address will be there.

2/ indeed my build doesn't support text (console) mode yet.
   full command-line support is on my to-do list and will be hopefully ready soon.

How can i import an address from the GUI (without the command line)? How can i display the private keys without the command parameters (console)?

I think the last btcurious version i used was 0.40

I hope you will soon succeed with the full command-line support. It would be a big gain.

I look forward to make a donation to your addr. Grin

Thanks for planning to donate, that's a real motivator to
help me prioritize my to-do list Smiley

In the meantime, here's how you would import a key with the
current build (0.49b):

0. Make sure you're online. This build won't work in offline mode.

1. Open a standard command prompt (Start Menu, Run, type cmd, click OK)
2. Drag the Elec049b.exe icon to the command prompt window. This will insert the full path to the executable.
3. add a space, type "import YourAddress:YourPrivKey" and hit Enter.
 
 ( So, if your Elec049b.exe file is on your desktop, your command will look something like this: C:\Documents and Settings\bitcats\Desktop\elec049b.exe import YourAddress:YourPrivKey )

4. That's it! Open the Electrum GUI by clicking the EXE file normally,
   and you should be able to see and use your imported address.

(5. Repeat as needed, for each address you would like to import)

Regarding your second request (how to display your private keys), this
will be possible when full command-line support is ready.

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bitcats
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May 17, 2012, 09:43:20 PM
 #725

I did it now exactly as described. No import!
I tried with de- and reinstallation, but again the same: the import command is not working. Could it be a Vista problem?

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flatfly
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May 17, 2012, 09:47:11 PM
 #726

I did it now exactly as described. No import!
I tried with de- and reinstallation, but again the same: the import command is not working. Could it be a Vista problem?

I don't think so but I'm suspecting a codepage issue. Is your OS in English?

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bitcats
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May 17, 2012, 09:51:54 PM
 #727

No its German.

Another point: I would prefer to import my own keys in offline mode. Thats how I did it with the btcurious build.

-> afk

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flatfly
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May 17, 2012, 10:07:07 PM
 #728

No its German.

Another point: I would prefer to import my own keys in offline mode. Thats how I did it with the btcurious build.

-> afk

Ok, I will do some testing and let you know of what I come up with by tomorrow...

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flatfly
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May 18, 2012, 06:08:19 AM
 #729

OK you're lucky, I couldn't manage to sleep so I spent all night working
on a special build of release 0.49b that finally includes a console. Smiley

Please download and try it from:
 http://win-electrum.googlecode.com/files/elec049b3.exe
 SHA-1: 6f1a8f787b76c9544399fdaa62e4d92788a174d7
 VirusTotal report: here

Notes:
To access the console: just hold down the SHIFT key while launching electrum.
Also, when typing commands, enclose electrum with parentheses (as shown in the example screenshot)

I'm not sure it will work for you right away, but at least you should get some more detailed error messages if it doesn't. Don't hesitate to report any errors.


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splat44
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May 18, 2012, 08:19:58 AM
 #730

Hi,

For the same reasons that you made this post, I just created a small program that generates bitcoin addresses and saves the keypair as an encrypted wallet file. It's basically a tool for the overly paranoid, since it doesn't create any unencrypted intermediate files and doesn't require the full bitcoin client just to generate an address. It also generates just 1 address, so it's impossible for somebody to steal your keys from an "old backup".

https://github.com/vegard/mkbtcaddr

Disclaimer: There is no warranty, etc., and I am not responsible if something goes wrong, etc.

I've tested it myself and it worked for me, but please scrutinise the source code before using it.


Vegard

Did some one tried this program using ubuntu live CD?

I find instructions rather a bit confusing which caused asking questions.

Do dependencies and programs mentioned already on ubuntu CD?
It would be great to how perform what being mentioned via gui!

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bitcats
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May 18, 2012, 08:58:06 AM
 #731

...
I'm not sure it will work for you right away, but at least you should get some more detailed error messages if it doesn't. Don't hesitate to report any errors.

Switching to this threat: https://bitcointalk.org/index.php?topic=73651.80

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cleanbit
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May 20, 2012, 01:29:35 AM
 #732

I would think a truecrypt container and an encrypted .dat file should be enough to prevent any thief who at least does not have physical access to your computer.

cleanbit
Hand-transacted clustered wallet mixing service with rotating IP addresses, PGP encryption of transactions, strict data removal procedures, and a guarantee not to receive your original coins back after mixing.
xbuzzx108
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yo yo yo!


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May 20, 2012, 07:27:23 AM
 #733

Thanks for the tutorial. I don't have a ton of BC yet, but I'm still interested in being as safe as possible.
Garr255
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What's a GPU?


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May 20, 2012, 07:47:29 AM
 #734

Great tutorial for teh nubs :3

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10below
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May 20, 2012, 12:15:18 PM
 #735

How important is it to encrypt your wallet if you will only be using it for small transactions? Putting money in then immediately spending it?
malaimult
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May 20, 2012, 02:01:15 PM
 #736

well it's not so important if you receive small amounts but if you deal with large trades or store your btc for a long time its very important to keep this dates in a secure way.

i recommend that you should try at least this secure methods and after that decide if you want to go with the non secure way

centralplan
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May 20, 2012, 09:07:06 PM
 #737

Great!
ajstar
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May 21, 2012, 01:09:24 AM
 #738

Is this solution secure enough?

Create new virtual PC, put there some linux (Mint/Ubuntu/whatever) a install bitcoin client. Run it only few times a month just to sync with network (or made some payments). Most of the time have this whole virtual PC stored on HDD and/or external memory. I guess the trojans aren't clever enough to mount virtual disk file and steal from wallet saved on that virtual disk, or are they?
Garr255
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What's a GPU?


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May 21, 2012, 02:06:39 AM
 #739

I'dn't be surprised if there were trojans capable of this.

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Monetizer
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Keep on Keepin' on


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May 21, 2012, 02:29:13 AM
 #740

Thanks for this tutorial! I will be sure to do this!

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